According to Mohd Abubakr from Microsoft Research in Hyderabad, the table can be improved by arranging it in circular form. He says this gives a sense of the relative size of atoms--the closer to the centre, the smaller they are--something that is missing from the current form of the table. It preserves the periods and groups that make Mendeleev's table so useful. And by placing hydrogen and helium near the centre, Abubakr says this solves the problem of whether to put hydrogen with the halogens or alkali metals and of whether to put helium in the 2nd group or with the inert gases.
That's worthy but flawed. Unfortunately, Abubakr's arrangement means that the table can only be read by rotating it. That's tricky with a textbook and impossible with most computer screens.
The great utility of Mendeleev's arrangements was its predictive power: the gaps in his table allowed him to predict the properties of undiscovered elements. It's worth preserving in its current form for that reason alone.
Germany’s Werner Mehl is the talented engineer who created the PVM-21 infrared chronograph, in many respects the most sophisticated ballistic speed-measuring system currently available to the general public. Werner runs a company, Kurzzeitmesstechnik, which specializes in high-tech ballistic measuring systems and ultra-high-speed photography. Werner has engineered camera and lighting systems that can literally track a bullet in flight, millimeter by millimeter, with eye-popping resolution. Werner employs digital cameras that record up to 1 million frames per second, with effective shutter speeds as fast as 1.5 nano-seconds. The videos produced by Werner’s systems are amazing. Below are two short samples. The first shows a 7mm bullet penetrating cardboard. Note you can clearly see the engraving of the rifling on the bullet.
The ability to digest the milk sugar lactose first evolved in dairy farming communities in central Europe, not in more northern groups as was previously thought, finds a new study led by UCL (University College London) scientists published in the journal PLoS Computational Biology. The genetic change that enabled early Europeans to drink milk without getting sick has been mapped to dairying farmers who lived around 7,500 years ago in a region between the central Balkans and central Europe. Previously, it was thought that natural selection favoured milk drinkers only in more northern regions because of their greater need for vitamin D in their diet. People living in most parts of the world make vitamin D when sunlight hits the skin, but in northern latitudes there isn't enough sunlight to do this for most of the year.
In the collaborative study, the team used a computer simulation model to explore the spread of lactase persistence, dairy farming, other food gathering practices and genes in Europe. The model integrated genetic and archaeological data using newly developed statistical approaches.
An analysis by Chas Egan of the Australian National University in Canberra and Charles Lineweaver of the University of New South Wales in Sydney indicates that the collective entropy of all the supermassive black holes at the centers of galaxies is about 100 times higher than previously calculated. Because supermassive black holes are the largest contributor to cosmic entropy, the finding suggests that the entropy of the universe is also about 100 times larger than previous estimates, the researchers reported online September 23 at arXiv.org.[...]
In the case of the universe, Egan says, “we'd like to know [when and] if the entropy will eventually reach a maximum value, marking the end of all dissipative processes, including life.” Physicists have dubbed that maximum entropy “heat death.”
The cannon is mostly used on weekends to attract people to Gill's Farm Market on Route 209 in Hurley, but sometimes the guys get together at the 1,500-acre farm and blast it when nobody's around. Just for fun.
They've shot pumpkins, scuba tanks and a basketball filled with corn and foam insulation. They once scattered some geese by accidentally shooting into the flock. Then there's the time they shot a bowling ball more than a mile.
"The first time we shot a bowling ball, that's was probably the worst thing we ever did," Arold says. "It kept going and going and going."
NS 999 is an entirely electric locomotive that uses a lead-acid energy storage system comprised of 1,080 12-volt batteries to operate in railroad switching applications without the use of a diesel engine and with zero exhaust emissions. The plug-in locomotive also can regenerate dynamic braking energy through a system provided by Brookville Equipment Company. The recovered dynamic braking energy continually replenishes the energy storage system, and uses this recovered energy for tractive effort in rail operations. The batteries are carefully monitored and controlled through an elaborate battery management system to assure safety and maximum battery life, and when fully charged NS 999 is able to operate three shifts before recharging is required.
Surrounded by crinolines and corset dresses sculpted out of wickerwork (think bread basket) and stuffed with round and shapely loaves, the French designer emphasized the finesse it had taken to create the show at the Cartier Foundation for contemporary art (until Oct. 10). The exhibition includes a sculpted dress with two brioches to create Gaultier's famous pointed-bosom gown for Madonna and a Kelly bag, lovingly shaped and baked, to celebrate his current role as designer for Hermès. Add umbrellas, hats and the signature matelot stripes re-created with inky dye.
The little two-wheeled robot can roam through the blaze spraying water from a fire hose and looking for trapped people. Its onboard light and camera helps firefighters pin-point people before they enter the building themselves. The robot also gives them enough information to decide on the safe routes, and quickly develop a rescue plan.
The Firefighters Assistance Robot is a small device resembling a miniature tank and measuring just 12.5 cm in diameter and weighing 2 kg. It can travel at 1 foot per second and withstand a fall of over six feet. It can also survive temperatures as high as 160 C (320 F). The operating time of the robot inside a burning structure is up to 30 minutes.
