Who needs a peep hole when a wifi network will do? Researchers from MIT have developed technology that uses wireless signals to see your silhouette through a wall—and it can even tell you apart from other people, too.
The team from MIT’s Computer Science and Artificial Intelligence Lab are no strangers to using wireless signals to see what’s happening on the other side of a wall. In 2013, they showed off software that could use variations in wifi signal to detect the presence of human motion from the other side of a wall. But in the last two years they’ve been busy developing the technique, and now they’ve unveiled the obvious — if slightly alarming — natural progression: they can use the wireless reflections bouncing off a human body to see the silhouette of a person standing behind a wall.
Not only that, the team’s technique, known is RF-Capture, is accurate enough to track the hand of a human and, with some repeated measurements, the system can even be trained to recognise different people based just on their wifi silhouette. The research, which is to be presented at SIGGRAPH Asia next month, was published this morning on the research group’s website.
– CDC Says Ebola Droplets Can Only Travel 3 Feet … But MIT Research Shows Sneezes Can Travel Up to 20 Feet (Washington’s Blog, Oct 28, 2014):
Checking the CDC’s Math
This week, the Centers for Disease Control (CDC) admitted that Ebola can travel through the air in aerosols, but claims that it can never go more than 3 feet.
Let’s check their math …
But the CDC itself admits that flu droplets can travel 6 feet.
Mythbusters demonstrated that sneezes can nail people some 17 feet away:
How? Continue reading »
– The Only Email System The NSA Can’t Access (Forbes, May 19, 2014):
When the NSA surveillance news broke last year it sent shockwaves through CERN, the particle physics laboratory in Switzerland. Andy Yen, a PhD student, took to the Young at CERN Facebook group with a simple message: “I am very concerned about the privacy issue, and I was wondering what I could do about it.”
There was a massive response, and of the 40 or so active in the discussion, six started meeting at CERN’s Restaurant Number 1, pooling their deep knowledge of computing and physics to found ProtonMail, a gmail-like email system which uses end-to-end encryption, making it impossible for outside parties to monitor.
Encrypted emails have actually been around since the 1980s, but they are extremely difficult to use. When Edward Snowden asked a reporter to use an end-to-end encrypted email to share details of the NSA surveillance program the reporter couldn’t get the system to work, says Yen. Continue reading »
– Encryption is less secure than we thought (MIT News, Aug 14, 2013):
For 65 years, most information-theoretic analyses of cryptographic systems have made a mathematical assumption that turns out to be wrong.
Information theory — the discipline that gave us digital communication and data compression — also put cryptography on a secure mathematical foundation. Since 1948, when the paper that created information theory first appeared, most information-theoretic analyses of secure schemes have depended on a common assumption.
Unfortunately, as a group of researchers at MIT and the National University of Ireland (NUI) at Maynooth, demonstrated in a paper presented at the recent International Symposium on Information Theory (view PDF), that assumption is false. In a follow-up paper being presented this fall at the Asilomar Conference on Signals and Systems, the same team shows that, as a consequence, the wireless card readers used in many keyless-entry systems may not be as secure as previously thought.
– Neuroscientists plant false memories in the brain (MIT News, July 25, 2013):
The phenomenon of false memory has been well-documented: In many court cases, defendants have been found guilty based on testimony from witnesses and victims who were sure of their recollections, but DNA evidence later overturned the conviction.
In a step toward understanding how these faulty memories arise, MIT neuroscientists have shown that they can plant false memories in the brains of mice. They also found that many of the neurological traces of these memories are identical in nature to those of authentic memories.
“Whether it’s a false or genuine memory, the brain’s neural mechanism underlying the recall of the memory is the same,” says Susumu Tonegawa, the Picower Professor of Biology and Neuroscience and senior author of a paper describing the findings in the July 25 edition of Science.
– How to turn living cells into computers (Nature, Feb 13, 2013):
Genetic system performs logic operations and stores data in DNA.
Synthetic biologists have developed DNA modules that perform logic operations in living cells. These ‘genetic circuits’ could be used to track key moments in a cell’s life or, at the flick of a chemical switch, change a cell’s fate, the researchers say. Their results are described this week in Nature Biotechnology1.
Synthetic biology seeks to bring concepts from electronic engineering to cell biology, treating gene functions as components in a circuit. To that end, researchers at the Massachusetts Institute of Technology (MIT) in Cambridge have devised a set of simple genetic modules that respond to inputs much like the Boolean logic gates used in computers.
The new molecules are known as ‘graphene fragments,’ because they largely consist of flat sheets of carbon (which are attached to zinc atoms). That makes them easier to align during deposition, which could simplify the manufacture of molecular memories. Graphic: Christine Daniloff/MIT
– Storing data in individual molecules (MIT News, Jan 23, 2013):
Moore’s law — the well-known doubling of computer chips’ computational power every 18 months or so — has been paced by a similarly steady increase in the storage capacity of disk drives. In 1980, a hard drive could store about a half-megabyte of data in a square inch of disk space; now, manufacturers are closing in on a million megabytes of data per square inch.
An experimental technology called molecular memory, which would store data in individual molecules, promises another 1,000-fold increase in storage density. But previous schemes for molecular memory have relied on physical systems cooled to near absolute zero. In the Jan. 23 online edition of Nature, an international team of researchers led by Jagadeesh Moodera, a senior research scientist in the MIT Department of Physics and at MIT’s Francis Bitter Magnet Laboratory, describes a new molecular-memory scheme that works at around the freezing point of water — which in physics parlance counts as “room temperature.”
Moreover, where previous schemes required sandwiching the storage molecules between two ferromagnetic electrodes, the new scheme would require only one ferromagnetic electrode. That could greatly simplify manufacture, as could the shape of the storage molecules themselves: because they consist of flat sheets of carbon atoms attached to zinc atoms, they can be deposited in very thin layers with very precise arrangements.
– MIT discovers a new state of matter, a new kind of magnetism (Extreme Tech, Dec 20, 2012):
Researchers at MIT have discovered a new state of matter with a new kind of magnetism. This new state, called a quantum spin liquid (QSL), could lead to significant advances in data storage. QSLs also exhibit a quantum phenomenon called long-range entanglement, which could lead to new types of communications systems, and more.
Researchers have discovered that there’s enough power in living trees to run an electric circuit.
– Electrical device plugs directly into trees for power (Mother Nature Network, Sep 10, 2012):
In today’s world of high-tech portable gadgets, iPods and cell phones, we’ve become dependent upon readily accessible electric outlets to power our devices and charge our batteries. But now researchers at the University of Washington have discovered nature’s alternative to the power outlet: living trees.
That’s right, living trees. UW engineers Babak Parviz and Brian Otis have invented an electrical device that can be plugged directly into any tree for power. “As far as we know this is the first peer-reviewed paper of someone powering something entirely by sticking electrodes into a tree,” said Parviz.
The research was based upon a breakthrough study last year out of MIT, when scientists found that plants generate a voltage of up to 200 millivolts when one electrode is placed in a plant and the other in the surrounding soil. Those researchers are already designing devices which act as forest sensors powered entirely by this new method. But until now, no one has applied these findings to the development of tree power.
– New energy source for future medical implants: sugar (MIT News, June 12, 2012):
Implantable fuel cell built at MIT could power neural prosthetics that help patients regain control of limbs.
MIT engineers have developed a fuel cell that runs on the same sugar that powers human cells: glucose. This glucose fuel cell could be used to drive highly efficient brain implants of the future, which could help paralyzed patients move their arms and legs again.
The fuel cell, described in the June 12 edition of the journal PLoS ONE, strips electrons from glucose molecules to create a small electric current. The researchers, led by Rahul Sarpeshkar, an associate professor of electrical engineering and computer science at MIT, fabricated the fuel cell on a silicon chip, allowing it to be integrated with other circuits that would be needed for a brain implant.
– All Hail the Robotic Farmers and Pilots of the Future (Wired, May 1, 2012):
NEW YORK — Fighter pilot Mary “Missy” Cummings saw it coming while landing her F/A-18 supersonic jet on a Navy aircraft carrier — the world-changing disruption barreling toward the present.
Instead of landing the multi-million-dollar machine on the small deck of the ship herself in the 1990s, a computer accomplished the tricky feat for her.
“Here the computer was taking off better than I could, landing itself better than I could and doing the mission better than I ever could,” Cummings said Tuesday during the Wired Disruptive by Design business conference. “It was really humiliating. That was what used to make me better than everyone else.”
Eventually Cummings took a step back, told herself the heyday of fighter pilots was over and joined the robots. She’s now an aeronautics professor at MIT working to tackle the monotonous work of flying, farming and other industries with autonomous drones. Continue reading »
– LED’s efficiency exceeds 100% (PhysOrg.com, Mar 5, 2012):
For the first time, researchers have demonstrated that an LED can emit more optical power than the electrical power it consumes. Although scientifically intriguing, the results won’t immediately result in ultra-efficient commercial LEDs since the demonstration works only for LEDs with very low input power that produce very small amounts of light.
The researchers, Parthiban Santhanam and coauthors from MIT, have published their study in a recent issue of Physical Review Letters.
As the researchers explain in their study, the key to achieving a power conversion efficiency above 100%, i.e., “unity efficiency,” is to greatly decrease the applied voltage. According to their calculations, as the voltage is halved, the input power is decreased by a factor of 4, while the emitted light power scales linearly with voltage so that it’s also only halved. In other words, an LED’s efficiency increases as its output power decreases. (The inverse of this relationship – that LED efficiency decreases as its output power increases – is one of the biggest hurdles in designing bright, efficient LED lights.)
In their experiments, the researchers reduced the LED’s input power to just 30 picowatts and measured an output of 69 picowatts of light – an efficiency of 230%. The physical mechanisms worked the same as with any LED: when excited by the applied voltage, electrons and holes have a certain probability of generating photons. The researchers didn’t try to increase this probability, as some previous research has focused on, but instead took advantage of small amounts of excess heat to emit more power than consumed. This heat arises from vibrations in the device’s atomic lattice, which occur due to entropy.
“As such, it is perhaps the most promising tool for behavioral change to have come along in decades.”
– Harnessing the Power of Feedback Loops (Wired, June 19, 2011):
The premise of a feedback loop is simple: Provide people with information about their actions in real time, then give them a chance to change those actions, pushing them toward better behaviors. Photo: Kevin Van Aelst
In 2003, officials in Garden Grove, California, a community of 170,000 people wedged amid the suburban sprawl of Orange County, set out to confront a problem that afflicts most every town in America: drivers speeding through school zones.
Local authorities had tried many tactics to get people to slow down. They replaced old speed limit signs with bright new ones to remind drivers of the 25-mile-an-hour limit during school hours. Police began ticketing speeding motorists during drop-off and pickup times. But these efforts had only limited success, and speeding cars continued to hit bicyclists and pedestrians in the school zones with depressing regularity.
So city engineers decided to take another approach. In five Garden Grove school zones, they put up what are known as dynamic speed displays, or driver feedback signs: a speed limit posting coupled with a radar sensor attached to a huge digital readout announcing “Your Speed.”
– Protecting medical implants from attack (MIT News, June 13, 2011):
Millions of Americans have implantable medical devices, from pacemakers and defibrillators to brain stimulators and drug pumps; worldwide, 300,000 more people receive them every year. Most such devices have wireless connections, so that doctors can monitor patients’ vital signs or revise treatment programs. But recent research has shown that this leaves the devices vulnerable to attack: In the worst-case scenario, an attacker could kill a victim by instructing an implantable device to deliver lethal doses of medication or electricity.
At the Association for Computing Machinery’s upcoming Sigcomm conference, researchers from MIT and the University of Massachusetts-Amherst (UMass) will present a new system for preventing such attacks. The system would use a second transmitter to jam unauthorized signals in an implant’s operating frequency, permitting only authorized users to communicate with it. Because the jamming transmitter, rather than the implant, would handle encryption and authentication, the system would work even with existing implants.
The researchers envision that the jamming transmitter — which they call a shield — would be small enough to wear as a necklace or a watch. A device authorized to access the implant would send encrypted instructions to the shield, which would decode and relay them.
On the day the tsunami hit it was known that there was a meltdown going on and the cover-up is still ongoing:
Listen to the interview with the former editor of the Japan Times Yochi Shimatsu on March 12:
Radioactive byproducts indicate that nuclear chain reactions must have been burning at the damaged nuclear reactors long after the disaster unfolded
Nuclear reactors produce radioactive by-products that decay at different rates. One common by-product is iodine-131 which has a half life of about 8 days while another is cesium-137 with a half life of about 30 years.
When a reactor switches off, the iodine decays more quickly so the ratio between these two isotopes changes rapidly over a period of days. That’s why measuring this ratio is a good way to work out when the nuclear reactions terminated.
There are some complicating factors, however. The most important of these is that the ratio of iodine-131 and cesium-137 to start with depends on how long the reactor has been operating and so is not constant.
Boston Dynamics, the military engineering firm best known for its four-legged BigDog robot, has been awarded two contracts by DARPA to develop a pair of new robots: an agile humanoid called ATLAS and a speedy, animal-inspired quadruped called CHEETAH.
ATLAS looks like a headless Terminator, with a torso, two legs and two arms, all controlled by an array of servos, pistons and robotic muscles. His killer feature is lifelike agility, and will be able to tackle difficult terrain by walking upright, sidling through narrow passages and using his hands for balance, support and grip.
“ATLAS will walk like a man, using a heel-to-toe walking motion, long strides and dynamic transfer of weight on each step,” explains Rob Playter, the ATLAS principal investigator and VP of Engineering at Boston Dynamics. Dynamic agility systems will allow the robot to use his own momentum to throw or swing himself across gaps and between handholds. It’s not entirely clear why he lacks a head.
CHEETAH, on the other hand, is about pure velocity. Named after the planet’s fastest land animal, Boston’s big-cat-inspired robot will sprint faster than the quickest human athletes. It doesn’t sacrifice maneuverability though, as the robot is being designed to take tighter turns so it can zigzag to chase and evade. “It will accelerate rapidly, starting and stopping on a dime,” says Boston Dynamics in a statement.
Ramesh Raskar explains how the camera can shoot around corners
A camera that can shoot around corners has been developed by US scientists.
The prototype uses an ultra-short high-intensity burst of laser light to illuminate a scene.
The device constructs a basic image of its surroundings – including objects hidden around the corner – by collecting the tiny amounts of light that bounce around the scene.
The Massachusetts Institute of Technology team believe it has uses in search and rescue and robot vision.
“It’s like having X-ray vision without the X-rays,” said Professor Ramesh Raskar, head of the Camera Culture group at the MIT Media Lab and one of the team behind the system.
(NaturalNews) Splicing and dicing natural plant compounds and patenting them for profit may be a thing of the past for drug companies, at least in terms of them having to do it manually in a laboratory. It might seem like something out of a science fiction movie, but a team of scientists from the Massachusetts Institute of Technology (MIT) has actually developed a way to genetically engineer plants that are programmed to create pharmaceutical drugs instead of their natural healing compounds.
You read that right. Sarah O’Connor and her colleagues from MIT added bacterial genes to periwinkle plants that altered their natural alkaloid production system, causing them to accept external chemical additions. Chemists then added halogens like chlorine and bromine to the plants’ biosynthetic mechanisms, which altered the composition of the final alkaloids. So instead of producing their natural alkaloids, the altered periwinkles literally started producing synthetic pharmaceutical drug versions of those alkaloids instead.
The process is similar to the type of genetic engineering that takes place with food crops, except this process goes a step further. Dubbed “metabolic engineering”, the process of altering the actual molecular output of plants shapes the very compounds they produce. And by manipulating these expressions, scientists can induce plants to grow a variety of different synthetic compounds that can be patented by drug companies.
The work is highly disturbing because periwinkles and other plants already produce natural, safe compounds that serve a therapeutic purpose. Vinblastine, the alkaloid naturally produced by periwinkles that was manipulated as part of the study, is already effective at treating cancer, for instance.
Paul Craig Roberts was Assistant Secretary of the Treasury during President Reagan’s first term. He was Associate Editor of the Wall Street Journal. He has held numerous academic appointments, including the William E. Simon Chair, Center for Strategic and International Studies, Georgetown University, and Senior Research Fellow, Hoover Institution, Stanford University.
Paul Craig Roberts
Last week on NPR a professor in the Sloan School of Management at MIT explained that what is really at stake in the health care bill is the US government’s ability to borrow. In other words, the bill is about cutting health care costs, not about providing hard-pressed Americans with health care.
The professor said that if we didn’t get health care costs under control, in 30 years the US government would not be able to sell Treasury bonds.
It is not at all clear that the Treasury will be able to sell its debt instruments in 30 months, and it has nothing to do with health care costs. The Treasury debt marketing problem has to do with two back-to-back US fiscal year budgets, each with a $2 trillion deficit. The size of the US deficit exceeds in these troubled times the supply of world savings available to fund the US government’s wars, bailouts and stimulus plans. If the Federal Reserve has to monetize the Treasury’s new borrowings by creating demand deposits for the Treasury (printing money), America’s foreign creditors might flee the dollar.
The professor didn’t seem to know anything about this and gave Washington 30 more years before the proverbial hits the fan.
One looks in vain to the US financial media for accurate economic information. Currently, Wall Street, the White House, and the media are hyping a new sign of economic recovery–”surging” June home sales. John Williams at shadowstats.com predicted this latest reporting deception.
Here is the way Williams explains how statistics can produce false signs of recovery. The economy has been contracting for so long that a plateauing of the falloff in home sales compared to the previous time period’s more rapid contraction can appear like a gain.
Thing of the past? The new mobile phone batteries will be recharged in just 10 seconds
A revolutionary mobile phone battery that recharges in 10 seconds instead of several hours has been created by scientists.
The new device charges 100 times as fast as a conventional battery and could also be used in phones, laptops, iPods and digital cameras within just two or three years, they say.
The same technology could even allow an electric car to be charged up in the same time that it takes to fill a conventional car with petrol – removing one of the biggest obstacles to green, clean motoring.
The quick-charge battery is the brainchild of engineers at the Massachusetts Institute of Technology.
The MIT team say their invention uses materials already available to battery manufacturers and would be simple to mass produce.
The invention is based on conventional lithium ion rechargeable batteries found in most cameras, phones and portable computers.
Spencer Ahrens, a 23-year-old mechanical engineer, was on MIT’s campus last week, holding a wooden plank, surrounded by onlookers.
Slowly, he turned that wooden plank before a series of mirrors that had been placed inside an aluminum frame, until the wood caught fire.
That was quite a moment, recalled Matthew Ritter, one of the onlookers.
“Let’s just say it was a small combustion for wood materials, but a giant explosion of solar energy,” he said.
Ahrens, Ritter and the other people who helped create the solar-powered dish that harnessed the sunlight that eventually burned the wood say they’ve just created the world’s most cost-efficient solar power system.
They also say these dishes may revolutionize global energy production.
“You can stick these things wherever there is a piece of sunlight, and power a home or an industrial plant,” said Ahrens, who just received his master’s degree from MIT.
Since January, he’s been working with Ritter, an Olin College student; Micah Sze, a recent graduate of MIT’s Sloan School of Management; University of California-Berkeley graduate and Broad Institute engineer Eva Markiewicz and MIT materials science student Anna Bershteyn.
Together, they built a 12-foot wide solar panel by piecing together lightweight aluminum tubes to make the frame. Inside, they arranged a series of mirrors and then attached a water-filled coil at the bottom of the frame.
When the frame is properly positioned, the mirrors will direct concentrated sunlight toward the coil.
As the water heats up, it is converted to steam, and that steam, the creators say, can be used to generate electricity to heat and cool homes and power machines.
They now say its design is so simple, it can be built and placed just about anywhere the sun shines.
“We made it by hand and transported the parts by car or by bike,” Ritter said.
The crew spent about $5,000 to build the dish, and according to MIT Sloan School of Management lecturer David Pelly, it is the cheapest way he’s seen to harness that much sun power.
“I’ve looked for years at a variety of solar approaches, and this is the cheapest I’ve seen,” he said.
Ahrens, Ritter and the others are now packing up and moving to California, where they plan to mass-produce the dishes, probably for less than it cost to build the first one.
Their new company is called RawSolar, and Ahrens said its possibilities are endless.
“The energy crisis affects so much of what we do,” Ahrens said. “It’s driving food prices and water problems and airline fares, and we are trying to work through these things in an environmentally and economically sustainable way.”
After all, he said, “Sunlight is free.”
Source: Boston Herald
What the student, Wilken-Jon von Appen, received in return was a letter that not only turned him down but added an ominous warning from John M. Busch, a security administration official: “I have determined that you pose a security threat.”
Similar letters have gone to 5,000 applicants across the country who have at least initially been turned down for a Transportation Worker Identification Credential, an ID card meant to guard against acts of terrorism, agency officials said Monday. Continue reading »
Think U.S. health authorities have never conducted outrageous medical experiments on children, women, minorities, homosexuals and inmates? Think again: This timeline, originally put together by Dani Veracity (a NaturalNews reporter), has been edited and updated with recent vaccination experimentation programs in Maryland and New Jersey. Here’s what’s really happening in the United States when it comes to exploiting the public for medical experimentation:
(1845 – 1849) J. Marion Sims, later hailed as the “father of gynecology,” performs medical experiments on enslaved African women without anesthesia. These women would usually die of infection soon after surgery. Based on his belief that the movement of newborns’ skull bones during protracted births causes trismus, he also uses a shoemaker’s awl, a pointed tool shoemakers use to make holes in leather, to practice moving the skull bones of babies born to enslaved mothers (Brinker).
New York pediatrician Henry Heiman infects a 4-year-old boy whom he calls “an idiot with chronic epilepsy” with gonorrhea as part of a medical experiment (“Human Experimentation: Before the Nazi Era and After”).
Harvard professor Dr. Richard Strong infects prisoners in the Philippines with cholera to study the disease; 13 of them die. He compensates survivors with cigars and cigarettes. During the Nuremberg Trials, Nazi doctors cite this study to justify their own medical experiments (Greger, Sharav).
Dr. Hideyo Noguchi of the Rockefeller Institute for Medical Research publishes data on injecting an inactive syphilis preparation into the skin of 146 hospital patients and normal children in an attempt to develop a skin test for syphilis. Later, in 1913, several of these children’s parents sue Dr. Noguchi for allegedly infecting their children with syphilis (“Reviews and Notes: History of Medicine: Subjected to Science: Human Experimentation in America before the Second World War”).
Medical experimenters “test” 15 children at the children’s home St. Vincent’s House in Philadelphia with tuberculin, resulting in permanent blindness in some of the children. Though the Pennsylvania House of Representatives records the incident, the researchers are not punished for the experiments (“Human Experimentation: Before the Nazi Era and After”).
Dr. Joseph Goldberger, under order of the U.S. Public Health Office, produces Pellagra, a debilitating disease that affects the central nervous system, in 12 Mississippi inmates to try to find a cure for the disease. One test subject later says that he had been through “a thousand hells.” In 1935, after millions die from the disease, the director of the U.S Public Health Office would finally admit that officials had known that it was caused by a niacin deficiency for some time, but did nothing about it because it mostly affected poor African-Americans. During the Nuremberg Trials, Nazi doctors used this study to try to justify their medical experiments on concentration camp inmates (Greger; Cockburn and St. Clair, eds.). Continue reading »
Tags: acne, Agent Orange, AIDS, American Cancer Society, Bacteria, BBC, biological warfare, blood poisoning, BP, brainwashed, Cancer, cancer cells, cancer patients, Central Nervous System, Chemical Warfare, Chevron, Children, cholera, CIA, Clinton, Columbia University, comas, Dani Veracity, dengue fever, Depression, dioxin, Dow, Dow Chemical, drugged, DuPont, electroshock, Epilepsy, experimental drugs, experimentation, Exxon, FDA, fenfluramine, Fluoride, food poisoning, Gardasil, George Bush, Gonorrhea, Guinea Pig Kids, Guinea pigs, Gulf War, Gulf War Syndrome, Harvard, hepatitis, hepatitis B vaccine, Herpes, HIV, homosexuals, Honeywell, HPV, hypnotized, Immune System, Inmates, insulin, Iodine, Iodine-131, J. Marion Sims, Kaposi's sarcoma, Lockheed Martin, LSD, Manhattan Project, measles vaccine, Medical Experiments, Merck, Mescaline, Mind-Control, Minorities, MIT, MKULTRA, Monsanto, mustard gas, myelin, Nazis, nuclear detonations, Pellagra, perchlorate, Philippines, Plutonium, Procter & Gamble, pyridostigmine, Radiation, radioactive, radioactive iron, raped, respiratory problems, Rockefeller Institute for Medical Research, Syphilis, threatened, thymidine, thyroid cancer, Torture, tuberculin, Uranium, Vaccination, Vaccine, yellow fever
Phone makers own scientists discover that bedtime use can lead to headaches, confusion and depressionRadiation from mobile phones delays and reduces sleep, and causes headaches and confusion, according to a new study.
The research, sponsored by the mobile phone companies themselves, shows that using the handsets before bed causes people to take longer to reach the deeper stages of sleep and to spend less time in them, interfering with the body’s ability to repair damage suffered during the day.