Set1 Set2 Set3 Set4 Set5 Set6 Set7 Set8 Set9 Set10
Set1 Set2 Set3 Set4 Set5 Set6 Set7 Set8 Set9 Set10
Showing posts with label 10. Show all posts
Showing posts with label 10. Show all posts
Largest collection of Google Logos on the web Set 10
Set1 Set2 Set3 Set4 Set5 Set6 Set7 Set8 Set9 Set10
DarkOrbit will fascinate you! Fight for prizes up to 10 000
DARKORBIT – the free browser based action shooter
- Play now and compete against thousands of real players
- DarkOrbit is a space game full of action and fun
- Browser games: No download, no installation necessary
- Fight for prizes up to $10,000
DarkOrbit will fascinate you!
Experience the infinite expanses of outer space while you fight alone or with your allies in increasingly remote sectors. Discover strange new worlds and be on your guard for mysterious aliens.
Join one of the three companies which will stop at nothing to gain power over the universe, and help you and your allies to gain wealth and power.
Build up your spaceship from a space dinghy to a feared battle cruiser and make a name for yourself in DarkOrbit!
Cilck the image to play.
Harvard Researchers Build 10 Robot
Theres been a lot of attention in the last year about various initiatives to encourage children to learn how to code; with new programming languages and of course the inexpensive and increasingly popular Raspberry Pi computer. To this we can now add a robot developed by Harvard University researchers that will cost just $10. The "Affordable Education Robot is a low-cost robot designed to introduce students of all ages to the fundamentals of programming and control of robots, with the hope of inspiring them to further pursue studies in Science, Technology, Engineering and Math (STEM)." Learn more about this robot here.
from The Universal Machine http://universal-machine.blogspot.com/
Put the internet to work for you.
| |
| Recommended for you |
Dr Gene Amdahl November 16 1922 – November 10 2015
Computer Pioneer, Mainframe Computer Architect & Entrepreneur
He is remembered for Amdahls law that basically states that the intrinsically serial part of any algorithm will limit the benefits from parallel processing. He was one of the architects of the IBM System/360 line of computers that dominated the mainframe industry and are still a force today. He was a champion of high-end uniprocessing.
Read his biography in the New York Times.
I am grateful to Dr Amdahl for creating a company at which I was able to work as a computer architect for 6 years, 1976-82 and consult at for more. I did not have much to do with him directly – he was way above my level and he left to form a new company in 1979. But some anecdotes are in order.
Dr Amdahl was revered by his Engineering Staff. He had a great knack of inventing rules of thumb to guide the designers. One was "one megabyte of I/O for every MIP of performance". Another, I remember vaguely, was that "caches should be square" (as many lines as bits in a line.) These were not necessarily correct rules but it was better to make the decision and get down to design rather than dithering (even better, of course, to measure and model.) He also had sound advice on functional architecture for speed – when you see an instructions operation code, you should immediately know the operand address and where the next instruction is located.
I noticed that Dr Amdahl was allowed to have opinions but he insisted that those with contrary opinions had to have facts. As the technology and markets changed, many of his assumptions had to be challenged. I was with the group that developed the high level characteristics of the 580. I remember us having to justify 2-way multiprocessing as being required because our main market was for capacity rather than solely for speed and one could no longer design uniprocessors that could compete. I remember once having to tell him that his favorite division algorithm as used in the 470V (involving finding the reciprocal using Newtons formula and multiplication) was actually slower than the expected speed of straightforward non-restoring division. When our arguments were solid he just accepted them and moved-on. He had to also accept microprogramming and memory chips for registers but I recall he embraced this and came up himself with a clever microcode scheme with two microstores, accessed simultaneously and each microinstruction including an address for the other memory – so each microinstruction could branch with no penalty.
My closest encounter with Dr Amdahl was when he was trying to get the 580 design started. The 470V used 100-gate ECL chips with 80 I/O pins. Fujitsu was developing the next technology with 400 gates per chip but still with 80 I/O. The Amdahl Corp. engineers were adamant that they couldnt design a faster computer and reduce the chip count because the I/O count was not adequate (this was because even with 100 gates they could not use them all in some cases and the famous "Rents Rule" requiring I/O to rise with chip density.) Dr Amdahl was dis-satisfied and hatched a plan to jolt the engineers into creativity by engaging with the Architecture group over the design.
So, Inder Singh (later to found the Ethernet switching company Excelan) and I found ourselves closeted with Dr Amdahl in his office. He presented us with copies of his handwritten logic for the 580 execution unit (a piece is below and I have put the whole thing on the web as it must be the last time when a major computers logic was specified in handwriting.) Our meeting was on a Friday and he left us with the task of coming up with a design by the following Monday!
It is hard to gauge the impact of Dr Amdahl and his engineering team on the process of designing fast computers but, if it could be known, I am sure that it would be profound. The Amdahl approach of making the processor pipeline central to the design, demonstrating that pipeline interlocks could be controlled without loss of performance (itself derived form earlier IBM projects), and that fast computers could be microprogrammed, gradually became known throughout the "valley" as design engineers moved on to new jobs.
Amdahl, the man and his company, were quite a phenomenon!
[Post written by Bob Doran]
from The Universal Machine http://universal-machine.blogspot.com/
Put the internet to work for you.
| Recommended for you |
10 awesome internet hacks to make your life better
Labels:
10,
a,
awesome,
beautiful,
better,
computer,
died,
hacks,
has,
internet,
life,
make,
mind,
to,
your
from The Universal Machine http://universal-machine.blogspot.com/
Put the internet to work for you.
| |
| Recommended for you |
Subscribe to:
Posts (Atom)
