"5.4 Controlling Numeric Output with print
...
The built-in variable OFMT contains the default format specification that print uses with sprintf when it wants to convert a number to a string for printing. The default value of OFMT is "%.6g". The way print prints numbers can be changed by supplying different format specifications as the value of OFMT, as shown in the following example:
$ awk 'BEGIN {
> OFMT = "%.0f" # print numbers as integers (rounds)
> print 17.23, 17.54 }'
-| 17 18
According to the POSIX standard, awk's behavior is undefined if OFMT contains anything but a floating-point conversion specification. (d.c.)"
from The GNU Awk User's Guide
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Saturday, March 9, 2013
Friday, March 8, 2013
Volunteer at Denver Greentech Conference Apr 4-5 for free admission (IEEE conference)
Want to be a part of a leading
International Conference on Advancing Green and Clean Energy Technologies in the 21st century?
|
Join our team of Volunteers at the 5th Annual IEEE Green Technologies Conference and trade a half day of service for a half day Free Admission.
The GREENTECH 2013 program includes presentations on worldwide advances in the areas of distributed generation, including renewables, integrating them into the grid and managing them through smart-grid technologies, the supporting infrastructure, including IT and communications, and methods for achieving efficiencies. In addition to the advances, keynotes and expert panelists will address both the current issues and future trends.
The 5th Annual IEEE Green Technologies Conference
April 4-5, 2013
Hyatt Regency DTC, Denver, Colorado, USA
8 Keynote Speakers
70+ Technical Papers
Authors from 24 countries
8 Expert Panel Sessions
Topics from policy, business strategy, to an array of technologies—from wind, solar, biomass, to transportation
|
Technical Panel Sessions include Wind Power Generation, Signal and Information Processing in Smart Grid, Marine Hydrokinetic, Smart Grid Technology, Power Systems Resiliency, IEEE 1547 Smart Grid Standards, and Utility-Scale PV: Next Generation Technology
Volunteering at GREENTECH 2013
Volunteer for one half day (four or more hours) and receive a half day free admission (on the same day). Apply by March 15, 2013, at: http://www.ieeegreentech.org/volunteer . Contact us with any questions at staffing@ieeegreentech.org.
| Thought and Product Leadership... Idea Exchange... Global Networking, and... Exceptional Learning...
GREENTECH 2013 is the place to be.
|
IEEE, 445 Hoes Lane, Piscataway, NJ 08854 USA
<http://www.ieee.org/>
Thursday, March 7, 2013
IEEE OnlineGreenComm - 10 May is “Call for Papers” deadline
View message online - Click here.
|
IEEE Communications Society - 17th floor , 3 Park Avenue, New York, NY 10016
Wednesday, March 6, 2013
Paper Conversations: nice idea from Accidental Genius (Mark Levy) – review thanks to Dextronet.com Blog
This seems like an interesting generalization of an effective engineering technique we have used, where one describes how something would be engineered to a colleague *even if* the colleague doesn't understand the details of the implementation. In describing our plan, we may develop the questions/concerns that we did not understand until we had to cast our ideas into words, such that it could make sense to others. I really like this book. - Cheers, Connie
"Hold a Paper Conversation
This one is fun.
You can talk to anyone. Steve Jobs, your local grocer, your grandmother, Oprah, talking owl, yourself 20 years ago or 20 years in the future. Or, you can remove yourself entirely from the situation and produce a discussion between others.
There are two rules to make these conversations successful:
First, when holding a paper conversation with a character, it’s important to make the character as real as possible. Before holding a paper conversation with a character, take a couple of minutes to write about the character. Be as specific as possible. Go as far into detail as you want. Also, don’t forget to think about the place where the conversation is taking place.
Second, get the characters to make you speak. Let yourself do the majority of the talking during the conversation. The character should act mainly as a gentle guide which draws fresh observations from your own words."
[The discussion noted above can be tunneled into by reading the 2nd and third pages of the above-name chapter (pages 62-63 of my 1st edition on my desk). ]
Accidental Genius Summary – Dextronet.com Blog
http://www.amazon.com/Accidental-Genius-Writing-Generate-ebook/dp/B003V5WTIC/ref=tmm_kin_title_0?ie=UTF8&qid=1311535637&sr=8-1#reader_B003V5WTIC
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"Hold a Paper Conversation
This one is fun.
You can talk to anyone. Steve Jobs, your local grocer, your grandmother, Oprah, talking owl, yourself 20 years ago or 20 years in the future. Or, you can remove yourself entirely from the situation and produce a discussion between others.
There are two rules to make these conversations successful:
First, when holding a paper conversation with a character, it’s important to make the character as real as possible. Before holding a paper conversation with a character, take a couple of minutes to write about the character. Be as specific as possible. Go as far into detail as you want. Also, don’t forget to think about the place where the conversation is taking place.
Second, get the characters to make you speak. Let yourself do the majority of the talking during the conversation. The character should act mainly as a gentle guide which draws fresh observations from your own words."
[The discussion noted above can be tunneled into by reading the 2nd and third pages of the above-name chapter (pages 62-63 of my 1st edition on my desk). ]
Accidental Genius Summary – Dextronet.com Blog
http://www.amazon.com/Accidental-Genius-Writing-Generate-ebook/dp/B003V5WTIC/ref=tmm_kin_title_0?ie=UTF8&qid=1311535637&sr=8-1#reader_B003V5WTIC
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Tuesday, March 5, 2013
readelf -x .text : from Hex dump in objdump and readelf
I did not know that readelf -x option could be the *name* of a section, not just the number, but I saw it here, and sure enough, it is also in the readelf man page on our RedHat systems:
...
Hex dump in objdump and readelf
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...
$ readelf -x .text null.o Hex dump of section '.text': 0x00000000 ec8351e5 8955fc71 fff0e483 04244c8d .L$.....q.U..Q.. 0x00000010 c7000000 00ec45c7 00000000 e845c734 4.E......E...... 0x00000020 f845c700 000000f4 45c70000 0000f045 E......E......E. 0x00000030 00002404 c7042444 89e8458b 00000000 .....E..D$...$.. 0x00000040 04c70424 4489ec45 8bffffff fce80000 ........E..D$... 0x00000050 244489f0 458bffff fffce800 00000c24 $..........E..D$ 0x00000060 f4458bff fffffce8 00000018 2404c704 ...$..........E. 0x00000070 fffffffc e8000000 242404c7 04244489 .D$...$$........ 0x00000080 fce80000 00302404 c7042444 89f8458b .E..D$...$0..... 0x00000090 ffffff fce80000 00012404 c7ffffff .....$......... $
...
NAME
readelf - Displays information about ELF files.
SYNOPSIS
readelf [-a|--all]
...
[-D|--use-dynamic]
[-x |--hex-dump=]
...
Hex dump in objdump and readelf
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Monday, March 4, 2013
Problem roll-up: 'Search Box" gadget fails to function - Google Groups
In case this is also broken on your blog:
Problem roll-up: 'Search Box" gadget fails to function - Google Groups
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Problem roll-up: 'Search Box" gadget fails to function 25 posts by 21 authors in Blogger Categories: | |
| Post reply |
This post has been edited
Problem roll-up: 'Search Box" gadget fails to function - Google Groups
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Saturday, March 2, 2013
IEEE Members on Supercomputing Predictions, Challenges, thanks to IEEE "The Institute"
IEEE Members on Supercomputing Predictions, Challenges
A recent conference focused on the future of supercomputing
18 February 2013
Photo: Baran Ozdemir/iStockphoto
What do increased energy efficiency, improved weather forecasting, a better understanding of the universe, and faster discovery of new drugs have in common? They are all expected to be commonplace over the next two decades with the help of supercomputing.
“Advances in supercomputing in the coming years will impact all areas that use any computing and simulation,” says Rajeev Thakur, technical program chair of SC12, the annual supercomputing conference cosponsored by the IEEE Computer Society. Last year’s event, held in November in Salt Lake City, featured five days of technical sessions and presentations on all aspects of supercomputers and their use, including architecture, networking, system software, programming environments, performance analysis, algorithms, data storage, visualization, and applications.
The conference tried to answer two key questions: What does the future of supercomputing look like, and what challenges must be overcome to get there?
MYRIAD APPLICATIONS
One area expected to see big changes is energy storage and distribution. “Advances in supercomputing in such areas as materials science will result in batteries with higher capacities at lower cost,” says Thakur, deputy director of the Mathematics and Computer Science Division at Argonne National Laboratory, in Lemont, Ill.
One area expected to see big changes is energy storage and distribution. “Advances in supercomputing in such areas as materials science will result in batteries with higher capacities at lower cost,” says Thakur, deputy director of the Mathematics and Computer Science Division at Argonne National Laboratory, in Lemont, Ill.
And IEEE Member Bronis de Supinski, who coauthored four papers that were presented at the conference, predicts headway in many other areas related to power. “With supercomputers, we expect to manage the power grid better and significantly improve our ability to predict how much electricity needs to be produced,” says de Supinski. “That can in turn reduce the production of electricity that simply ends up being wasted.”
Other experts have gone as far as to say that by 2027, supercomputing will play a role in the development of nearly limitless clean energy by enabling clean nuclear fission via thermonuclear reactors that could produce three to four times as much energy as a nuclear power plant without generating radioactive waste.
Supercomputing is also expected to play a big role in better weather prediction. “High-fidelity and higher-resolution simulations will result in more accurate weather predictions and tracking of storms and hurricanes,” says Thakur. That could go a long way toward helping areas that will be hit by storms to prepare.
Supercomputing’s potential isn’t just limited to Earth. “Large-scale cosmological simulations will give us a better understanding of the building blocks of the universe,” Thakur adds. That includes dark matter, dark energy, the geometry of the universe, and why the universe’s expansion rate is accelerating.
Health care is another area expected to see major effects. Currently, the discovery of new medications is a long process, requiring extensive screening of many compounds against isolated biological targets to learn their effects. Faster, more powerful computers will change that. “Advanced simulations in molecular dynamics will greatly accelerate new drug discovery,” Thakur says.
In addition, supercomputers are being used to study the potential of regenerative medicine—the process of regenerating human cells—which could eliminate some diseases, undo the effects of aging, and possibly even extend lives.
CHALLENGES AHEAD
But all these advances rely on the ability to overcome several major technical hurdles.
But all these advances rely on the ability to overcome several major technical hurdles.
“Opinions vary on which are the biggest challenges,” says de Supinski. “But many feel that power—and its dissipation—will be the biggest constraint. Power considerations are already changing the kinds of processors available. We are building computer systems today that have a peak power of about 10 megawatts. Simple scaling would lead to 500 MW for an exascale system if built from today’s components. The projected power consumption for an exascale system in 2022 is 100 to 200MW, based on historic trends for improvements in energy efficiency of components. And since 1 MW roughly equates to US $1 million in operating costs, that level of power is untenable.”
Thakur agrees that power consumption will be a major issue, along with several others. “One of the biggest technical challenges will be minimizing power consumption—how to provide 1000 times higher performance while consuming roughly the same amount of power as today’s supercomputers,” he says. Thakur notes other important issues, which include developing hardware, software, and applications resilient to failure; designing algorithms that scale to systems of such a large size; and programming systems that could have hundreds of millions of cores.
For de Supinski, the biggest challenge will involve memory bandwidth and capacity. “The amount of memory and the bandwidth to memory continues to shrink relative to the computational capability of the systems we’re building,” he says. “We may not be able to use the increased computational capabilities effectively in future systems because of that. Projections show that our typical applications will first be limited by memory bandwidth and then by memory capacity unless we do something very different.”
For Thakur, funding will be key. “Overcoming these challenges requires a concerted effort of research and development involving academia, research labs, and vendors,” he says. “This, in turn, is critically dependent on the availability of sustained funding for research and for the acquisition and deployment of the next generation of supercomputers.”
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IEEE Members on Supercomputing Predictions, Challenges - IEEE - The Institute
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