Slashdot is powered by your submissions, so send in your scoop

 


Forgot your password?
Close
typodupeerror
×
Transportation

Tethered, Water-Powered Jetpack Provides Two Hours of Flight Time 170

Posted by Soulskill from the fun-on-the-lake dept.
arshadk writes "Unlike 'ordinary' jetpacks, the JetLev is actually two vehicles, tethered by a hose the thickness of your thigh. On the water is a small speedboat-like unit which contains a 250 horsepower motor and a pump. This is connected to the pack — into which you strap your frail body — by a 10-meter hose. The water is pumped from the sea or lake below up to the nozzles on the jetpack, providing a 1,900-Newton thrust, enough to lift a human weighing up to 150 kilos."
Science

'Invisibility Cloak' Created Using Crystals 98

Posted by Soulskill from the keep-this-discovery-away-from-the-klingons dept.
Zothecula writes "The quest to build a working 'invisibility cloak' generally focuses on the use of metamaterials – artificially engineered materials with a negative refractive index that have already been used to render microscopic objects invisible in specific wavelengths of light. Now, using naturally occurring crystals rather than metamaterials, two research teams working independently have demonstrated technology that can cloak larger objects in the broad range of wavelengths visible to the human eye. PDFs of the two similarly named research papers are available through arXiv.org."
Math

Euler's Partition Function Theory Finished 117

Posted by Soulskill from the that-was-quick dept.
universegeek writes "Mathematician Ken Ono, from Emory, has solved a 250-year-old problem: how to exactly and explicitly generate partition numbers. Ono and colleagues were able to finally do this by realizing that the pattern of partition numbers is fractal (PDF). This pattern allowed them to find a finite, algebraic formula, which is like striking oil in mathematics."
Games

Adding an Olfactory Dimension To Games 108

Posted by Soulskill from the secret-cow-level-not-so-alluring-anymore dept.
cylonlover writes "California-based company Scent Sciences is looking to bring an olfactory dimension to computer games with its ScentScape personal digital scent delivery system. The ScentScape Gaming Suite system consists of a unit that plugs into a PC or gaming console via USB and generates smells using scent cartridges. As well as aiming for the development of ScentScape-capable games from games developers, the system also allows gamers to add scents to existing games and share these with other ScentScape system users."
It's funny. Laugh.

Stars Remain In Their Usual Places; People Panic 468

Posted by timothy from the why-is-the-alphabet-in-that-order? dept.
asheller writes "The Star Tribune tells us the zodiac signs have shifted. Earth's wobble has shifted the signs, a new one's been added and many of us have changed signs. Formerly a Cancer, I've apparently been upgraded to Gemini and am now married to an Ophiuchus, a new sign. What's yor sign? The new Zodiac Chart is pretty interesting." Here are some priceless reactions to this celestial development. As long as the Chinese Zodiac is unaffected, I'll still be able to accurately judge people based on when they were born, so please indicate in comments your (new) sign and birth year animal, so we'll be able to know where you're coming from.
Sci-Fi

Doctor Marries Doctor's Daughter, TARDIS Explodes 326

Posted by CmdrTaco from the try-saying-that-five-times-fast dept.
techmuse writes "In a veritable Who's Who of Doctor Who, 10th Doctor David Tennant is marrying Georgia Moffett, the daughter of 5th Doctor Peter Davison, who played the Doctor's daughter in an episode of Doctor Who. Except that the Doctor's daughter was a clone of the Doctor, which meant that she really was Who. So a newer Doctor is marrying an older Doctor's daughter, who is a clone of the newer doctor, but only has half the DNA of the older Doctor."
Image

Real-Life Frogger Ends In Hospital Visit Screenshot-sm 314

Posted by samzenpus from the going-for-the-logs dept.
BigSes writes "A 23-year old man has been hospitalized after police in South Carolina say he was hit by an SUV while playing a real-life version of the video game Frogger. Authorities said the 23-year-old man was taken to a hospital in Anderson after he was struck Monday evening. Before he was hit, police say the man had been discussing the game with his friends. Chief Jimmy Dixon says the man yelled 'go' and darted into oncoming traffic in the four-lane highway. Has it come time to ban some of the classics before someone else goes out and breaks a few bricks with their heads after eating a large mushroom?"
Input Devices

Elliptic Labs To Bring Touchless Gestures To iPad 55

Posted by timothy from the unhand-me-sir-unhand-me dept.
An anonymous reader writes "Elliptic Labs will reveal their Touchless Gesture User Interface technology at CES 2011. Elliptic Labs sprung forth from the signal processing environment at the University of Oslo and what they've come up with is an [iPad] dock which creates a 'touchless zone' that extends out about 1 foot in front and to the sides of the iPad screen. Users can then initiate a number of gestures, much like on Microsoft Kinect, to manipulate onscreen content."
Image

8-Year-Olds Publish Scientific Bee Study Screenshot-sm 174

Posted by samzenpus from the write-of-the-bumblebee dept.
flintmecha writes "A group of British schoolchildren may be the youngest scientists ever to have their work published in a peer-reviewed journal. In a new paper in Biology Letters, children from Blackawton Primary School report that buff-tailed bumblebees can learn to recognize nourishing flowers based on colors and patterns. The paper itself is well worth reading. It's written entirely in the kids' voices, complete with sound effects (part of the Methods section is subtitled, ''the puzzle'duh duh duuuhhh') and figures drawn by hand in colored pencil."
Math

Mathematics As the Most Misunderstood Subject 680

Posted by timothy from the philosophical-engagement dept.
Lilith's Heart-shape writes "Dr. Robert H. Lewis, professor of mathematics at Fordham University of New York, offers in this essay a defense of mathematics as a liberal arts discipline, and not merely part of a STEM (science, technology, engineering, mathematics) curriculum. In the process, he discusses what's wrong with the manner in which mathematics is currently taught in K-12 schooling."
The Military

North Korea Says War With South Would Go Nuclear 608

Posted by Soulskill from the cruisin'-for-a-bruisin' dept.
A reader writes "According to reports from the Uriminzokkiri, the official website of the Democratic People's Republic of Korea, a war with South Korea would involve nuclear weapons, and '[will] not be limited to the Korean peninsula.' The article goes on, 'The Korean peninsula remains a region fraught with the greatest danger of war in the world. This is entirely attributable to the US pursuance of the policy of aggression against the DPRK (North Korea).'"
Classic Games (Games)

Pac-Man's Ghost Behavior Algorithms 194

Posted by Soulskill from the i-hate-the-pink-one dept.
An anonymous reader writes "This article has a very interesting description of the algorithms behind the ghosts in Pac-Man. I had no idea about most of this information, but that's probably because it's difficult to study the ghosts when I die every 30 seconds. Quoting: 'The ghosts are always in one of three possible modes: Chase, Scatter, or Frightened. The "normal" mode with the ghosts pursuing Pac-Man is Chase, and this is the one that they spend most of their time in. While in Chase mode, all of the ghosts use Pac-Man's position as a factor in selecting their target tile, though it is more significant to some ghosts than others. In Scatter mode, each ghost has a fixed target tile, each of which is located just outside a different corner of the maze. This causes the four ghosts to disperse to the corners whenever they are in this mode. Frightened mode is unique because the ghosts do not have a specific target tile while in this mode. Instead, they pseudorandomly decide which turns to make at every intersection.'"
Books

Greg Bear, Others Cry Foul on Project Gutenberg Copyright Call 721

Posted by timothy from the hey-man-I'm-still-using-that dept.
Nova Express writes "Recently a lot of science fiction stories from the 1950s and 60s (including work from still-living authors like Frederik Pohl and Jack Vance) have been showing up on Project Gutenberg as being in the public domain. However, according to science fiction writer Greg Bear and his wife Astrid Anderson Bear (daughter of Poul Anderson, some of whose works were among those put up), Project Gutenberg has made a mistake: 'After conducting legal research on the LEXIS database of legal cases, decisions, and precedents, we have demonstrated conclusively that PG was making incorrect determinations regarding public domain status in many, many works that originally appeared in magazine form ... In general, Project Gutenberg is doing a tremendous service by making available texts that have truly long since fallen out of copyright, but they are clearly overstepping their original mandate. They are not merely exploiting orphan works, but practicing a wholesale kidnapping of works that are under copyright protection.'"

Slashdot Top Deals

Don't panic.

Close