Thursday 14 April 2011
Thursday 7 April 2011
Sunday 13 March 2011
Mobile phones could run for months between charges
It focuses on changing the way a device's digital memory works, as this consumes much of the charge.
At the moment mobile phone memories contain thin metal wires. Every time information is accessed, electricity is passed through them to retrieve the data.
The electrical engineers thought that if the size of the components used to store and retrieve the information could be reduced, so could the amount of electricity.
They have discovered a way of using carbon nanotubes - tiny tubes 10,000 times thinner than a human hair - instead.
Feng Xiong, a graduate student on the team who was lead author on a paper, to be published in the journal Science, explained: "The energy consumption is essentially scaled with the volume of the memory bit.
"By using nanoscale contacts, we are able to achieve much smaller power consumption."
Prof Eric Pop, who led the project, said: "I think anyone who is dealing with a lot of chargers and plugging things in every night can relate to wanting a cell phone or laptop whose batteries can last for weeks or months."
He thought that the method could improve a mobile phone's efficiency so much that they could be made to run simply by harvesting heat, kinetic energy or solar energy.
Japan earthquake: how Twitter and Facebook helped
Websites, powered by broadband connections, became a lifeline for many when mobile phone networks and some telephone landlines collapsed in the hours following the 8.9 scale earthquake.
For many, Twitter, the microblogging site and Facebook, have become the easiest, quickest and most reliable way of keeping in touch with relatives as well as providing emergency numbers and information to those in stricken areas.
Even the US State Department resorted to using Twitter to publish emergency numbers, and informing Japanese residents in America how to contact families back in Asia. Relief organisations used Twitter to post information for non-Japanese speakers to lists of shelters for those left homeless.
Skype, the phone service that operates over the internet, and Google, the information website, also became invaluable resources for those searching for missing relatives.
Many mobile phone networks are unable to cope in the immediate aftermath of a crisis, if hundreds of thousands of customers try to make a call or send a text at the same time, as many Londoners discovered during the July 2007 terrorist incidents.
In Japan mobile phone carriers were limiting voice calls on congested networks, with NTT DoCoMo restricting up to 80 per cent of voice calls, especially in Tokyo. Softbank and Au, rival phone companies, were also affected, with Tokyo residents unable to send text messages to friends and relatives.
Skype, however, continued to work well, as did Facebook and Twitter as well as Mixi, Japan's most popular social networking site. Jill Murphy, a teacher from Liverpool, said she kept in touch with her 15-year-old cousin via Facebook chat – an instant messaging service run by the popular website. "She was Facebook chatting from under her desk at Yokohama International School, while the quake was going on. It was absolutely amazing.
"She couldn't contact her parents a few miles away – the phones were down and the trains had stopped running – but we knew she was OK on the other side of the world. Facebook and Twitter are automatically the first place you now go to to find out what is going on."
Twitter, which allows users to post very short messages – no longer than 140 characters long – became very popular with people trying to find out news. People in Japan used it to post news about how serious the situation was where they were, along with uploads of mobile videos they had recorded.
Frequently these videos were viewed by hundreds of thousands of people before the mainstream media had picked up on them and rebroadcast the footage.
Within an hour, more than 1,200 tweets a minute were coming from Tokyo. By the end of Friday, American time, a total of 246,075 Twitter posts using the term "earthquake" had been posted.
The Red Cross was initially overwhelmed with people using its Family Links website, which helps track people during an emergency. Within a couple of hours Google stepped in, launching a version of its person finder tool for the earthquake, Person Finder: 2011 Japan Earthquake. Offered in both Japanese and English web sites, the tool has a link for people seeking information about friends and loved ones in areas affected by the quake and tsunami and it had another link for people wanting to post information about individuals.
Technology helped in other ways. NHK, the Japanese government television broadcaster, was streaming footage via iPhone applications to viewers on the other side of the world, allowing people thousands of miles away, and even those without televisions, to watch live pictures.
EMAIL Unlimited Attachment limit & Unlimited Storage
During 2006, Lycos introduced several media services, including Lycos Phone which combined video chat, real-time video on demand, and an MP3 player. In August of the same year, a new version of Lycos Mail was released, which allowed sending and receiving large files, including unlimited file attachment sizes. In November 2006, Lycos began to roll out applications centered around social media, including the first "watch and chat" video application with the launch of its Lycos Cinema platform. In February 2007, Lycos MIX was launched, allowing users to pull video clips from YouTube, Google Video, Yahoo! Video and MySpace Video. Lycos MIX also allowed users to create playlists where other users could add video comments and chat in real-time.
As part of a corporate restructuring to focus on mobile, social networks and location-based serves, Daum sold Lycos for $36 million in August 2010 to Ybrant Digital, an internet marketing company based in Hyderabad, India.
Starting in May 2007, Yahoo! started to roll out to its users an unlimited amount of e-mail storage.
Yahoo! Mail has the following features:
Free version
- Unlimited Mail Storage.
- 25 MB attachments
- 100 filters to automatically sort incoming messages
- Protection against spam and viruses.
- Advertising is displayed on the screen while working with the e-mail account. Text ads are not within the e-mails themselves, and they are now added to the footer of outgoing messages, as of February 2011.
- POP3 support, Mail Forwarding facility, and SMTP support in some countries (but not in the US). Current and new accounts can not order the free POP3 / forwarding service – attempts give acurrently not for sale error.
- Accounts not logged into for four months get deactivated (the account can be retrieved but all stored data, such as e-mails, are lost).
- Early in 2006, Yahoo! Mail introduced aliases to its repertoire of features. Users could now add a alias username containing a dot character for a pre-existing account.
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