Smart bracelet protects aid workers

A hi-tech bracelet could soon be helping civil rights and aid workers at risk of being kidnapped or killed.

When triggered, the personal alarm uses phone and sat-nav technology to warn that its wearer is in danger.

Warnings are sent in the form of messages to Facebook and Twitter to rally support and ensure people do not disappear without trace.

The first bracelets are being given out this week and funding is being sought to make many more.

The bracelets have been developed by the Civil Rights Defenders campaign group in a bid to help workers in war zones and other areas of conflict.

The chunky bracelet has mobile phone technology buried within it that can send prepared messages when the gadget is triggered.

Alerts can be sent manually by a rights worker if they feel under threat or are triggered automatically if the bracelet is forcefully removed. The alarm sends out information about its owner and where they were when they were attacked. Other staff nearby will also be alerted so they can start to take action to help anyone in distress.

Civil Rights Defenders wants people to sign up to monitor the bracelets of individual rights workers via social media. It hopes the global involvement will act as a deterrent to anyone planning attacks on aid workers.

"Most of us, given the chance, would like to help others in danger," said Civil Rights Defenders' executive director Robert Hardh. "These civil rights defenders are risking their lives for others to have the right to vote, or to practice religion or free speech."

Those who monitor bracelets can also help bring pressure to bear on governments to find or release people abducted or jailed. In total, 55 bracelets will be given out by the end of 2014.

The rights group started work on the gadget in the wake of the kidnapping and murder of Chechen rights worker Natalia Estemirova in 2009. Ms Estemirova had been involved in documenting the alleged abuse of civilians by government-backed militias.

Will we ever… communicate telepathically?

There’s tantalising evidence that technology could one day allow us to transmit thoughts telepathically between two brains. The question is how far can we go?

In a lab at Harvard Medical School, a man is using his mind to wag a rat’s tail. To send his command, he merely glances at a strobe light flickering on a computer screen, and a set of electrodes stuck to his scalp detects the activity triggered in his brain. A computer processes and relays the electrodes’ signal to an ultrasound machine poised over the rat’s head. The machine delivers a train of low-energy ultrasound pulses into the rat’s brain, stimulating its motor cortex – the area that governs its movements. The pulses are aimed purposely at a rice-grain-sized area that controls the rat’s tail. It starts to wag.

This link-up is the brainchild of Seung-Schik Yoo, and it works more than 94% of the time. Whenever a human looks at the flickering lights, the rat’s tail almost always starts to wag just over a second later. The connection between them is undeniably simple. The volunteer is basically flicking a switch in the rat’s brain between two positions – move tail, and don’t move tail. But it is still an impressive early example of something we will see more of in coming years – a way to connect between two living brains.

Science-fiction is full of similar (if more flamboyant) brain-to-brain links. From the Jedi knights of Star Wars to various characters in the X-Men comics, popular culture abounds with telepathic characters that can read minds and transmit their thoughts without any direct physical contact or the use of their senses. There’s no evidence that any of us mere mortals share the same ability, but as Yoo’s study shows, technology is edging us closer in that direction. The question is: how far can we recreate telepathy using electronics? A human wagging a rat’s tail is one thing. Will we ever get to the point where we can share speech or emotions or memories?

The first step would be to decode what someone is thinking. Neuroscientists have made substantial progress in deciphering images from patterns of brain activity, and several groups are working on decoding inner speech. People have managed to commandeer computer cursors, artificial limbs and virtual drones through brain-computer interfaces (BCI), which use brain activity to control man-made devices. But to achieve true telepathy, brain activity has to be decoded and used to influence another brain. “We’ve got brain-to-computer interfaces, but we need the other side of it – computer-to-brain interfaces,” says Yoo.

Last year, Christopher James from the University of Warwick built a very rudimentary one. He used scalp electrodes to mentally control a set of LEDs, which flashed at one speed when James thought about moving his left hand, and at another when he imagined moving his right hand. James’ daughter was watching the LEDs, and though she couldn’t consciously distinguish between the two flashing speeds, her visual cortex – the part of the brain that processes sights – registered the difference. By measuring the activity in her brain, another set of electrodes could work out what the LEDs were doing.

This may have been an electronic link-up between two human brains, but as James points out, it’s not telepathy. “It’s not like someone sits there imagining a complex thought, and it appears in the other person’s head,” he says. “My daughter was completely unaware. At no point did she say ‘Left’ or ‘Right’. It would have been more informative to put the words on the screen.” She also had to look at the LEDs to register what was happening, which violates the “no senses allowed” rule of true telepathy. 

10 of the most powerful nuclear bomb, nuclear and hydrogen bomb ever have on earth

10. Little Boy 

Sure about the "little guy" have information. Bomb the United States dropped on Hiroshima to end World War. On the first atomic bomb was dropped on a large human population and its code name was "Little Boy" . The bomb, however, the second artificial nuclear explosion in history as well. Explosion in a few seconds, kills more than 100 thousand people. The explosion was powerful 16 kilo tones.

9. Fat Man

"Fat Man" bomb was code-named others that America dropped on Japan's citizens. One of the most devastating bombs have been used throughout history. The low altitude of the city exploded in Nagasaki, more than 50 thousand people in the immediate vanishing and 30 were injured and thousands were injured. It is said in the statistics that many were killed and injured many more, but Americans never accepted it. The explosion was the 21 kilo tons, the equivalent of 75 million simultaneous explosion of dynamite sticks.

 8. Ivy Mike

Nuclear explosions of giant mushrooms, they know more. This fungus is formed after Ivy Mike nuclear test. The nuclear bomb of two types: nuclear fission and nuclear fusion. The explosive power of the bomb was the second between 10.5 to 12 mega tonnes estimated. This test Enewetak in a region called the Pacific Islands took place.

 7. Hurricane 

Learn about the first nuclear bomb test by Great Britain. It exploded in 1952 using plutonium in Montebello Islands in the West Australian took. The bomb, Fat Man, was similar in terms of technology.

 6. Mark-21

The bomb was built in 1955 by America is one of the strongest gravity bombs in 1954 in "Operation Castle" exploded. 4.5 meters long and weighed 6,800 pounds and the power of the explosion was equivalent to 4 mega tone. However, only one of which was extremely dangerous bombs were made ​​in that period.

 5. Mark-36 

Here is the heaviest and most powerful nuclear bomb in its own time, we design a system that is based on secondary chain reactions and nuclear fusion takes place. Powerful explosion equivalent to 10 mega tons and weighs about 8000 kilograms. This generation of nuclear bomb makers, all Mark-21 Series experience in designing it was to become one of the most notorious.

 4. Castle Bravo

What set it apart from others is that this bomb on the first hydrogen bomb was tested. Year Explosion, 1954 and it was the Marshall Islands. The explosion was the equivalent of 15 mega tons of his time was up, and of course the manufacturer, United States. 4.5 meters long and weighed 10,700 pounds, and it exploded, leading to the emergence of severe radioactive contamination.

 3. B-53 

Here is one of the world's most powerful barrel bombs have been designed during the Cold War and its production had reached about 340 pieces to 1997, These design changes later, became one of the most powerful time bomb, but the power of this sample, weighing 4010 kg and length 3.8 m, 9 mega tons.

2. B-41 

The nuclear bomb was tested in the early 1960s and was more powerful than its predecessors. A 25 mega-tonne bomb that was set during the Cold War and weighing about 4,850 kilograms, 3.8 meters in length. 500 in the bomb was produced until 1976 and had served in America's military.

1.Tsar Bomba

The Tsar bomb that had the most powerful Bombs exploded in human history, nicknamed King bombs and if you think that Americans made it and test, have to inform you that we need to take our Northern neighbor, Russia, (former Soviet Union) that in the year 1961 explode.

The bomb that 100 Mega Watts of power explosive in the experiment with 50 Mega Watts of power exploded.

Maybe for your is interesting that you know, idea behind this project that was an explosion in the healthy radioactive pollution to be done and it was clear that, this work was done with success and the bomb was one of the Most Pure samples of test-in terms of radioactive pollution.

New Portable Charger for your iphone which can easily fit in your wallet

If you go out for a purpose, only to discover that your smartphone is just about dead. You're not going to bring a charging cable and wall unit with you -- who can fit all of that in their pocket? so you just dim the screen, turn off email and hope that the slim sliver of red battery bar will last you the rest of your evening, or at least until that special someone gives you a call or a text.

The inventors of a new, cleverly-named device called the Charge Card think they have the anecdote to this all-too-familiar modern quandary: It's a portable iPhone or Android charger shaped like a credit card, designed to be slim enough to fit in your wallet. One edge of the Charge Card plugs into your smartphone and there are versions of the charger that work with Android and both the old and new iPhone chargers and a small rubberized strip pops out from the center of the card and acts as a USB charger. That means you can charge your phone, so say the entrepreneurs behind the Charge Card, in almost any laptop, computer monitor, USB-equipped car, Xbox, point-of-sale cash register, or, realistically, wherever you can find an open USB port.

The Charge Card gained notice this past year as part of a super-successful Kickstarter campaign that raised over $160,000 for the project, more than triple the $50,000 goal. Now, the Charge Card team  three California twenty somethings named Noah Dentzel, Adam Miller and Brian Hahn are preparing to send the first units to the customers, with the goal of shipping by the end of January.

The fledgling startup has already sold 9,000 Charge Cards, Dentzel told in an interview at the Consumer Electronics Show in Las Vegas last week, and they have begun to take fresh orders at their website. One Charge Card costs $25 and, for now, it is only available online.