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China needs online games rating system: Study
BEIJING: Parents in China are in dire need of a sound age-rating system for online games in order to protect their children, says a new study.
China does not have a unified content rating system for the online games industry, which relies on individual games developers to class their own products into suitability-related groups, Xinhua said.
According to the report by the government-backed www.youth.cn, only 39 per cent of 423 games were age-rated by the developers.
Moreover, 51 per cent of those labelled with an age restriction failed to pass a third party evaluation on their ratings, the report said.
The report said that 78 per cent of the games should be restricted to adult players above 18, while only two percent were good for children above six.
About 80 percent of China's over 560 million internet users are minors, who definitely need more children-friendly or teenager-friendly games, it said.
The report, however, said the major problems for online games were not violence, pornography or horror elements, and only three percent of the games failed to pass the tests.
Electronic chips that can repair themselves

WASHINGTON: A team of engineers at the California Institute of Technology (Caltech) have for the very first time developed self-healing integrated chips.
The team, made up of members of the High-Speed Integrated Circuits laboratory in Caltech's Division of Engineering and Applied Science, has demonstrated this self-healing capability in tiny power amplifiers.
The amplifiers are so small, in fact, that 76 of the chips--including everything they need to self-heal--could fit on a single penny.
In perhaps the most dramatic of their experiments, the team destroyed various parts of their chips by zapping them multiple times with a high-power laser, and then observed as the chips automatically developed a work-around in less than a second.
"It was incredible the first time the system kicked in and healed itself. It felt like we were witnessing the next step in the evolution of integrated circuits," Ali Hajimiri, the Thomas G. Myers Professor of Electrical Engineering at Caltech said.
"We had literally just blasted half the amplifier and vaporized many of its components, such as transistors, and it was able to recover to nearly its ideal performance," he said.
Until now, even a single fault has often rendered an integrated-circuit chip completely useless.
The Caltech engineers wanted to give integrated-circuit chips a healing ability akin to that of our own immune system--something capable of detecting and quickly responding to any number of possible assaults in order to keep the larger system working optimally.
The power amplifier they devised employs a multitude of robust, on-chip sensors that monitor temperature, current, voltage, and power.
The information from those sensors feeds into a custom-made application-specific integrated-circuit (ASIC) unit on the same chip, a central processor that acts as the "brain" of the system.
The brain analyzes the amplifier's overall performance and determines if it needs to adjust any of the system's actuators--the changeable parts of the chip.
Interestingly, the chip's brain does not operate based on algorithms that know how to respond to every possible scenario.
Instead, it draws conclusions based on the aggregate response of the sensors.
Looking at 20 different chips, the team found that the amplifiers with the self-healing capability consumed about half as much power as those without, and their overall performance was much more predictable and reproducible.
The Caltech team chose to demonstrate this self-healing capability first in a power amplifier for millimeter-wave frequencies.
Such high-frequency integrated chips are at the cutting edge of research and are useful for next-generation communications, imaging, sensing, and radar applications.
By showing that the self-healing capability works well in such an advanced system, the researchers hope to show that the self-healing approach can be extended to virtually any other electronic system.
The research is published in the journal IEEE Transactions on Microwave Theory and Techniques.

Google planning to kill passwords
HOUSTON: Web giant Google is researching to build a more secure hardware device which in future can be used to login to a computer or an online account, thus eliminating the need for a password.
Designed in the shape of rings which can be worn on fingers, these hardware devices will aid in logging in to a computer or online account.
The search engine first revealed its plans to put an end to passwords in an academic paper published online in January.
The effort focused on having people plug a small USB key that provides their credentials into a computer.
The possibility of using special jewellery in a similar manner was mentioned in that paper.
According to Google's principal engineer, who specialises in security, Mayank Upadhyay at the RSA security conference in San Francisco last week, "Using personal hardware to log in would remove the dangers of people reusing passwords or writing them down."
"Everyone is familiar with an ATM. What if you could use the same experience with a computer?" Upadhyay said, adding that Google's trial was focused on a slim USB key that performs a cryptographic transaction with an online service to prove the key's validity when it's plugged into a computer.
The key also has a contactless chip inside so that it can be used to log in via mobile devices. Tokens like the ones Google is testing do not contain a static password that could be copied.
The cryptographic key unique to the device is stored inside and is never transmitted.
When the key is plugged in, it proves its validity by correctly responding to a mathematical challenge posed by the online service it is being used to log into, in a way that doesn't produce any information that could be used to log in again.
Google is already talking with other companies to lay the groundwork for using the technology to access different services and websites.
"It's extremely early stages, and we're trying to get more partners," said Upadhyay.
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