Cutting Edge

"Fetch" and "heel" may be the latest commands to join the military lexicon, with the arrival of Rex, a small, six-wheel-drive load-bearing robotic vehicle designed to follow squad-size units in response to voice commands.

Envisioned as a robotic "beast of burden" for the modern soldier, Rex can carry more than 400 pounds, a typical load for groups of 3 to 10 ground soldiers, for 72 hours at a time without refueling, according to developer Israel Aerospace Industries.

"The robotic vehicle follows the lead soldier from a given distance, utilizing technology developed and patented … Read more

Sex with oneself in the world of plants and animals is called, fittingly, "selfing." The offspring of selfing females share 100 percent of their mothers' genes, and they can go on to produce their own offspring.

The offspring of "outcrossing" (the sexy science term for mating) males and females, on the other hand, share 50 percent of each parent's genes. Some offspring, naturally, are males that cannot bear offspring.

Of the two systems, it turns out that outcrossing produces offspring whose more diverse genetic codes lead to greater chances for longer lives, lower susceptibility to … Read more

It looks as if Photoshop, already famous for its ability to make people look thinner and skies look bluer, could take digital erasure of unsightly objects to an entirely new level.

A feature called "content-aware fill" described in an Adobe video published Tuesday shows the technology used to remove buffalo, telephone wires, and a tree from various images and to clean up stray hairs from an imperfect scan of a print. Photoshop's existing cloning and spot-healing tools can take care of this to some extent, but the new version adds a lot of smarts to the process. … Read more

I have tried to avoid the Balloon Boy, his dad, and all who sail in this online/offline/out-of-line clattermaran.

However, thanks to CBS News, I have learned that Richard Heene once appeared on a fine YouTube extravaganza called The Psyience Detectives and offered 15 reasons why our haggard old world will end on December 21, 2012.

I have no idea if the world will end in 2012, though I suspect Richard Heene doesn't know either. And yet there is something quite eerie that he should assault our eyes and ears in the same week that a movie called &… Read more

KENNEDY SPACE CENTER, Fla.--NASA's towering Ares I-X rocket was hauled to the launch pad early Tuesday for blastoff October 27 on a $445 million unmanned test flight that likely will play a major role in the ongoing debate about NASA's post-shuttle manned space program.

The slow trip to pad 39B began at 1:39 a.m. EDT Tuesday when a powerful crawler-transporter carrying the Ares I-X rocket and its mobile launch platform slowly pulled out of the Vehicle Assembly Building at the Kennedy Space Center. Powerful spotlights illuminated the vehicle as it emerged from the VAB, providing … Read more

Twelve days after it launched WorldView-2 into orbit, DigitalGlobe has released its first images from the satellite, which will supply high-resolution photography for Google's and Microsoft's online mapping services.

The first images are of two locations in San Antonio, Texas, where the company is showing off its work at the GeoInt 2009 Symposium this week, and of Dallas Love Airport.

The quality of the images should improve over these first shots, taken Monday. "More refinements to early-stage images can be expected as the ongoing check-out and calibration continues," DigitaGlobe said.

Microsoft and Nokia sponsored the WorldView-2 launch, … Read more

It may look like something your kids brought home from shop class, but this rugged, French-designed micro air vehicle (MAV) could be a missing link between smooth, steady hover and fast, forward flight.

The inventor, Dr. Jean-Marc Moschetta, professor of aerodynamics at the Institut Superieur de l'Aeronautique et de l'espace in Toulouse, France, created what he calls the MAVion with both commercial and military markets in mind.

A mere 30 centimeters long, the MAVion combines fixed wings with two counter rotating propellers, allowing it to operate with high aerodynamic efficiency--even in adverse conditions, according to the professor.

"… Read more

Researchers in California are developing a simple robot cockroach that can be assembled in an hour, move quickly, and survive 92-foot falls.

The Dynamic Autonomous Sprawled Hexapod, or DASH, is a neat example of the insectile robotics from UC Berkeley's Biomimetic Millisystems Lab.

Robot cockroaches have been designed before, but DASH seems relatively simple to put together before it can be used to creep everyone out.

The 4-inch, 16-gram bug is put together by folding cardboard and polymer sheets. A DC motor runs the six legs while a servomotor bends the frame to induce left or right turns.

It … Read more

So you're a programmer deciding where to invest your energy. What's a better idea: the latest Apple device, where hot new games can mean big bucks and millions of users, or a calculator introduced 10 years ago?

Most go for iPhones and iPods. But another community thrives in its own way. These are the folks who spend hours trying to elevate their Texas Instruments calculators to a level far surpassing their modest roots.

Among their achievements: adding new features, creating new operating systems, connecting the calculator to keyboards and other hardware, playing a video excerpt from "The Matrix," and even running Nintendo Game Boy video games. Not bad for calculators such as the $100 TI-83 Plus, introduced in 1999 with a Z80 processor running at 6MHz, 24KB of memory, 160KB of flash memory, and a 96x64 pixel display.

Why all this work for projects that realistically are not going to reshape the future of computing? Much of the motivation parallels mountaineer George Mallory's rationale for climbing Mount Everest: "Because it's there."

TI's graphing calculators are programmable, affordable, and widely used in schools--a lot more approachable than a Himalayan peak. That doesn't mean they're easy. The calculators must be programmed in assembly language--a slightly more human-readable version of the very basic machine code the calculators execute, but hardly something more easily read and debugged such as C or Java. … Read more