If cultured fish is fed with wild stock, are we doing more harm than good when we buy fresh from the farm?
By Jen TrolioPosted 03.14.2006 at 2:00 am 0 Comments
The fact that nearly three quarters of the world's fisheries are dangerously close to depletion makes aquaculture seem like our only chance at meeting the ever-growing demand for seafood. But it takes fish to grow fish: Most of the fish meal used in today's aquaculture feed is made from small, oily specimens such as anchovies and sardines. A huge load of these "forage" fish-roughly a third of the global catch-is turned into fish meal every year. The Pew Ocean Commission estimates that it takes four pounds of wild fish to produce one pound of farmed fish. So what's the deal?
Transparent OLEDs could turn your living-room window into a high-def TV
By Elizabeth SvobodaPosted 03.13.2006 at 2:00 am 0 Comments
Sleek, wall-mounted plasma screens might seem like viewing nirvana now, but what if a picture window could double as a flat-screen TV? Or what if your car´s GPS system could be displayed on your windshield? Researchers at the Fraunhofer Institute in Germany have invented a transparent OLED (organic light-emitting diode) that will allow just that, transforming any clear surface into a see-through display.
If you strike a pedestrian, this pyrotechnic-powered hood pops up to pack a softer punch
By Matthew PhenixPosted 03.10.2006 at 2:00 am 0 Comments
It sounds like something out of a Bond flick: a car with a hood that´s launched open by a pair of explosive charges. But Jaguar´s Pedestrian Deployable Bonnet System (PDBS) isn´t intended to thwart bad guys. Its purpose is to soften the impact on the unfortunate soul who gets hit by the European version of the 2007 Jaguar XK. PDBS is Jaguar´s response to new European Union legislation that requires automobiles to be gentler on pedestrians in the event of a collision (exploding hoods have not been greenlighted in the U.S.).
Learn to power small networked devices (like security cameras) with an Ethernet cable
By Paul WallichPosted 03.10.2006 at 2:00 am 1 Comment
Quick, how many cables go into the back of a wireless (a.k.a. Wi-Fi or 802.11) netcam? That would be one: a power cord.
How many cables go into the back of a wired netcam, which hooks directly into your ethernet? Also one, if you´re using PoE (power over ethernet). PoE takes advantage of the fact that only two of the four twisted pairs of wire (connected to pins 1/2 and 3/6) in a standard Cat5 ethernet cable carry signals. The other four wires are available to deliver power to your camera or whatever other AC-powered device you have on the network.
The Cassini spacecraft has found evidence of geysers on Enceladus, a strange, cold moon of Saturn. This discovery brings the total number of places in the known universe with liquid water to two: there and Earth. (Mars had liquid water long ago, and Jupiters moon Europa is only suspected of having a liquid ocean buried under ice.) Carolyn Porco, the always-enthusiastic Cassini imaging team leader, describes the findings thusly in her e-mail announcement:
What we have discovered about the story of Enceladus is thrilling beyond imagination: more heat emerging from the south polar region, per square meter, than from the Earth and, possibly, subterranean organic-rich bodies of liquid water only tens of meters beneath the south polar terrain. If we did nothing else, these findings alone would have made the Cassini mission worthwhile.
Weve written about Cassini twice in recent years: a preview of the mission as it arrived in July 2004 and an update on its incredible findings in April 2005. Perhaps its time for another look. —Michael Moyer
The Roomba's new serial interface lets you use the little vacuum for any robotics task you like, controllable through preprogrammed instructions or over Bluetooth from a laptop. We wrote about some 'bots you could make with this in the January issue's How 2.0 section, but the obvious outcome was finally realized last night at ETech: Roomba cockfighting. More photos as well as videos (including some from the Roomba's point of view) here.
Tactical UAV or serious toy spy plane? Keep up withâ€”and keep tabs onâ€”the Joneses
By Eric AdamsPosted 03.09.2006 at 2:00 am 1 Comment
It takes two sets of wings to Tango-this unmanned aerial vehicle (UAV) from Draganfly Innovations uses tandem front and rear wings pitched in opposite directions (front set up, rear set down) to significantly increase its stability in the air, which makes it easier to control. Available as either a remote-controlled UAV or a fully autonomous drone, the fiberglass Tango uses a camera [A] in its underbelly and a 2.4-gigahertz radio antenna to send TV-quality live video to your computer.
Inexpensive and efficient, the smallest cars are finally available in the U.S.
By Stephan WilkinsonPosted 03.09.2006 at 2:00 am 0 Comments
Small streets and pricey fuel have shaped the European car market to favor smaller cars. In fact, what we call a compact car is a midsize on the continent. But now that Ameri- cans are feeling the burn of expensive gas, automakers have responded by bringing a fleet of smaller-than-subcompact vehicles to our shores. Unlike previous stripped-down econoboxes, these will be equipped to appeal to both the budget-minded and the car-savvy consumer.
In what is being touted as the Internets largest digital image
ever, two software engineers have posted an ultra-high-resolution
picture of the Earths surface as a demo of their high-res-image-serving software. The 3.7-gigapixel image—weighing in at approximately 10.7 gigabytes—is taken from NASAs Blue Marble
program, which uses Earth-imaging satellites to extensively photograph
and study the planet. The software, which was originally commissioned
by London's National Gallery to serve zoomable large-scale images of
artwork over the Web, divides the main image into thousands of smaller
mosaic tiles and serves them as needed depending on the location and
zoom level relative to the original image. The system is also used to
display images from the Hubble telescope, which can be zoomed in on to
reveal ridiculous levels of detail.
Its amazing to think that for all but a fraction of world history,
no one knew what the planet Earth looked like from space. And now, a
detailed satellite view of practically every inch of the planet—previously
available only to privileged government agencies—is accessible to
anyone through the Web. —John Mahoney