In 1958, Chaim Pekeris completed a landmark project in computer science. As a physicist at the Weizmann Institute of Technology in Israel, he become fascinated with the relatively new science of quantum mechanics and its potential to explain from first principles the behaviour of HP Pavilion DV2000 batteryatoms.
There was a problem however. The equation developed by Schrodinger that could do the job was too complex for mere mortals to handle. Using it to determine the electronic energy levels of a even a lowly helium atom was seemingly impossible.Chaim's task was monumental. He first had to persuade the Wiezmann Institute and a technical committee on Compaq Presario V5000 Battery including Einstein and Von Neumann, to build a computer. Einstein proved hard to persuade but was eventually won over by Von Neumann.
WEIZAC, Israel's first electronic computer was built between 1954 and 1954. According to Wikipedia, WEIZAC was an asynchronous computer operating on 40-bit words. Instructions consisted of 20-bits: an 8-bit instruction code and 12-bits for addressing. For a memory it had a magnetic drum that could store 1,024 words.
This program then kept WEIZAC busy for months, eventually producing a set of tables describing the energy levels of a helium atom, the first time this had been done accurately..So how has Moore's Law affected this process to Compaq Presario 2100 Battery , ask Koutschan and Zeilberger. They repeated Pekeris' project using the modern tools of computer science to see how they compare.
They say that the numeric computation--the work done by WEIZAC--can be completed in a fraction of a second on any laptop. Koutschan and Zeilberger say they were able to condense this part of the project, which took Pekeris at least 20-hours, into a 2-hour session. Of course the limiting factor here is not the Dell KD476 battery software but the 'wetware'. Which means that the next generation of improvements will either have to focus on improving the wetware or taking it out of the loop entirely.
That's a fascinating study and counterintuitive in some ways too. While it's easy to see the many orders of magnitude improvement that has improved hardware, it's clear from this work that the speed up from software is more limited. In particular, an order of magnitude improvement--from 20 hours to 2 hours--in the time it takes to do the algebra for this problem is a surprisingly small improvement over a 50 year period.
With Apple acceptable to barrage its new iPhone 4G at next week's Worldwide Developer's Conference, as the aggregation has done for the accomplished HP Pavilion dv6000 Battery for three summers, belief is aggressive about what new appearance ability appear that haven't been apparent in two leaked prototypes.
One catechism is whether CEO Steve Jobs may wow iPhone admirers with a beyond awning size, said IDC wireless analyst Ramon Llamas. "With 4.0, a lot is predicated on the touchscreen, and so the next catechism is how big is that screen?" Llamas asked. With aggressive accessories artful the iPhone's touchscreen with bigger HP Pavilion dv9000 Battery screens, Llamas wonders if Apple will raise, alarm or pass.
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Among the added questions to be answered if Jobs, as expected, releases the iPhone 4G at Apple's WWDC Monday in San Francisco is, if it is altered from the prototypes apparent by the world, will it accept a active rather than VGP-BPS9/B touchscreen keyboard -- a affection that text-happy iPhone users accept pined for?
"I doubtable they will accept video chat, but a lot of of the added appearance were talked about at the [iPhone OS] 4.0 advertisement [in March], such as an chip e-mail client," Dulaney said. "We could aswell see some move against Internet TV, and we will see the iPad processor acceptable in the device."
A reverse-engineered iPhone 4G ancestor that appeared on a Vietnamese tech website acclimated an Apple-branded one-gigahertz A4 processor, which admiral the iPad. Dell's Streak tablet/smartphone hybrid, aswell appear Friday in the United Kingdom, has a five-inch screen to Dell Inspiron E1505 Battery . Jobs could aswell accomplish some big account by advertisement a CDMA-compatible adaptation of the iPhone -- absurd back Apple has been aboveboard loyal to AT&T as its absolute U.S. carrier, admitting appear arrangement problems.
