Tuesday, January 25, 2011

Unified memory heralds green PCs

A new form of computing memory which could lead to faster starting, user-friendly computers has been developed by US researchers.

The device, developed by a team at North Carolina State University, claims to combine the advantages of two commons forms of memory used today.

The "unified" memory device, outlined in the journal IEEE Computer, is still undergoing testing.

But the team believe it could form the basis of PCs that start immediately.

Permanent speed

Currently, computers rely on two distinct forms of memory: volatile and non-volatile.

The type of memory used depends on whether data needs to be accessed quickly or stored permanently.

Volatile technologies such as random access memory (RAM) or its newer variation DRAM, store data in such a way that it can be read and written rapidly, making it ideal for rapid computations. But the data is lost when the power is switched off.

By contrast, non-volatile memory devices, such as the flash drives found in memory cards, USB dongles and MP3 players, can retain information for long periods without power.

But the device created by Dr Paul Franzon and his team combines the speed of DRAM while being able to switch to a more persistent mode of storage.

That would potentially enable computer makers to build machines that boot up almost instantly, as the information needed to start up the machine could be stored in fast memory, said Dr Franzon.

It could also lead to servers that can be powered down, when not in use.

Currently, the servers found in most data centres continue to slurp energy even when their processors are idle because the server memory cannot be turned off without affecting performance.

Lasting memory

The device developed by Dr Franzon's team - known as a double floating-gate field effect transistor - stores data in the form of a charge, like non-volatile memory but uses a special control gate to enable the stored data to be accessed quickly.

Today's flash memory devices use a single floating gate to store an electric charge, which represents data. "We realised that a second gate would allow us to transfer charges really quickly," said Dr Frazon.

His team have shown they can transfer charges - in effect change the data - in around 15 nanoseconds. "That's comparable with DRAM speeds," he added.

When in non-volatile mode, the data will be stored safely for a couple of years.



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Law firm stops chasing 'pirates'

A lawyer has dramatically withdrawn from pursuing alleged illegal file-sharers in the middle of a court case he brought.

The patent court in London is currently scrutinising 26 cases brought by ACS: Law on behalf of its client MediaCAT.

The law firm had sent thousands of letters to alleged file-sharers.

Those who received such letters may pursue ACS: Law for harrassment, said law firm Ralli, which represents some of the defendants.

In a statement read to the court, solicitor Andrew Crossley said he had now ceased all such work.

He cited criminal attacks and bomb threats as reasons.

"I have ceased my work...I have been subject to criminal attack. My e-mails have been hacked. I have had death threats and bomb threats," he said in the statement, read to the court by MediaCAT's barrister Tim Ludbrook.

"It has caused immense hassle to me and my family," he added.

In September, ACS: Law was the victim of a cyber attack and it accidentally exposed thousands of its e-mails online when its website went live again.

These e-mails detailed all the people it was pursuing and the pornographic films they were accused of downloading for free.

The data breach is the subject of an ongoing investigation by the Information Commissioner, and Mr Crossley could face a hefty fine.

ACS: Law hit the headlines when it began sending thousands of letters to alleged file-sharers, on behalf of client MediaCAT.

Consumer group Which? has accused it of sending letters to innocent people, while some ISPs have refused to hand over details about their customers.

"It can be incredibly upsetting for people to recieve these letters and they may well have a claim in harrassment," said Michael Forrester, a solicitor at law firm Ralli, which represents some of the defendants in the current case.

Groups such as the BPI, which represents music labels, have criticised its methods.

Judicial scrutiny

Those methods hinge on a partnership between ACS: Law and MediaCAT, which in turn has signed deals with various copyright holders allowing it to pursue copyright infringement cases on their behalf.

Analysis

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The case of MediaCAT versus 26 alleged illegal file-sharers is proving as dramatic as a Dickensian court drama.

Judge Birss described the twists and turns as "mind-boggling" as more details emerge about how ACS: Law and its colourful solicitor Andrew Crossley went about chasing alleged pirates.

But among the debates about the competence of ACS: Law and its real motives, is some evidence which could provide an interesting test of such cases in the future.

Both barristers for the defendants have questioned whether IP addresses - the numerical code which identifies the network connection - can be used as evidence and Judge Birss has raised doubts about whether accusing someone of "allowing" their network to be used for illegal file-sharing is a watertight argument.

With the government pledging to get tough on net pirates, there will be many waiting to see what Judge Birss says when he delivers his judgement in a few days.

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The court heard that copyright owners receive a 30% share of any recouped revenue while ACS: Law takes a 65% share.

Members of the public who received letters were given the choice of paying a fine of around �500 or going to court.

Detractors have accused Mr Crossley of seeking to make money with no intention of taking any cases to court.

In his statement, Mr Crossley denied this.

"It has always been my intention to litigate and, but for the fact that I have ceased this work, my intention was to litigate forcefully in these 26 cases," he said.

Mr Crossley is subject to an ongoing investigation by the Solicitors Regulation Authority.

Even before Mr Crossley's statement, the court case had been highly unusual.

ACS: Law's client MediaCAT wants to drop the cases, and letters have already been sent to the defendants informing them that action against them has been dropped.

Not happy

"Start Quote

I am getting the impression with every twist and turn since I started looking at these cases that there is a desire to avoid any judicial scrutiny"

End Quote Judge Birss

But Judge Birss said granting permission to discontinue the cases was not a simple matter, due largely to the fact that the actual copyright holders were not in court.

This meant that, in theory, these copyright holders could continue to pursue cases against the 26 defendants.

"Why should they be vexed a second time?" he asked.

Judge Birss also questioned why MediaCAT wanted to drop the cases.

"I want to tell you that I am not happy. I am getting the impression with every twist and turn since I started looking at these cases that there is a desire to avoid any judicial scrutiny," he said.

The case was made more complicated by the fact that a new firm, GCB Ltd, had begun sending similar letters, including one to one of the defendants who had been told just the day before that no further action would be taken.

Judge Birss said he was considering banning MediaCAT from sending any more such letters until the issues raised by the cases had been resolved.

Doing so, he said, would be a highly unusual move but one made more likely by the fact that Mr Crossley had said in his statement that there were "no new letters pending" and that GCB Ltd had also halted its work.

The judge was keen to find out what the relationship was between GCB and ACS: Law, something Mr Crossley sought to clarify in his statement.

He said that he had no connection with GCB Ltd beyond the fact that the founders of the firm had previously been employed at ACS: Law.

The case has raised some serious questions about how copyright firms pursue file-sharers.

Barristers acting on behalf of the accused questioned whether an IP address - a number assigned to every device connecting to the internet - could be used to identify the person who downloaded illegal content.

Barrister Guy Tritton also questioned the nature of the letters sent by ACS: Law, asking why it described MediaCAT as a "copyright protection society" - a title that he said was "misleading".

Judge Birss is expected to deliver his judgement on the case later in the week.



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