Domain: ieee.org
Stories and comments across the archive that link to ieee.org.
Comments · 1,868
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Re:It was a design defect
Adler-32 wouldn't be a great choice. It's fast but it's weak for short messages and I've seen it fooled by multi-bit errors on large messages too.
See Koopman's paper 32-bit cyclic redundancy codes for Internet applications for some better ideas.
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Re:About damn time!
They are offering the majority of their software patents for free to people who offer to join the fight against patents...
"...who offer to join the fight against patents?" Riiiiiight. I think you're jamming words into IBM's mouth that it didn't put there.
IBM's donation is a standards-body/consortium licensing agreement. It works like this:
"We've made and patented many contributions to this niche. We will put ours into a pool with other contributors so that we can all use them in a cooperative manner, so long as certain conditions of development are satisfied. We'll also allow others to use the technologies and participate in the consortium if they abide to the same conditions..."
This is a traditional licensing arrangement. It helps ensure that the participants play according to some common rules - e.g., compulsory cross-licensing, such as "no one will warp the standard in a proprietary way, or refuse to cross-license their products on a reasonable basis..." etc.
These agreements only work because of the pooled patents. They ensure that participant who doesn't comply will be in breach of licenses, and will be on the hook for patent infringement damages (likely of a whole body of patents donated by many players!) If those patents did not exist, there would be no significant financial threat... and hence, no consortium. In fact, this is one of the strongest arguments in favor of patents for software (and any other technology.) It wards off "embrace, extend, extinguish" tactics and other types of anticooperative behavior.
In general, IBM is a huge fan of patent licenses - it's one of the top patent licensors in *any* field. Only a few are donated to consortiums like this - the quid pro quo of most of its licenses is a cash payment, or a cross-license of another patent, etc. Those are traditional (and widely practiced and accepted) forms of software licenses... and if anything, they support the concept of software patents - because they can be, and often are, used in a cooperative manner.
BTW - it's hardly "a majority" of its patents... it has donated 500 patents to OSS, but it typically receives over 3,000 patents annually.
- David Stein
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Re:A new meaning to high speed protocol...
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Re:A new meaning to high speed protocol...
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Re:What is so special about a "charging station?"
Big problem is safety. Handling batteries for hybrids right now is a delicate business without a whole lot of trained technicians. An accidental shock will kill you with the size of the battery on a hybrid, and probably by extension on an all electric car. There's an article from the Providence Journal about repair shops servicing hybrids that should give some perspective on the 'certified technician' issue: http://www.projo.com/projocars/content/CA-HYBRIDSERVICE_05-10-08_LA9V0UK_v17.252cbc8.html Because of the problems associated with infrequent charging stations, IEEE has an article suggesting that trucks might be one of the first to go electric on a large scale - if you have fixed routes it becomes a lot easier to strategically plan charging stations and lowers the startup cost. http://www.spectrum.ieee.org/jul08/6439
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powerline repairs
What happens when the lineman makes the final connection and closes the gap? Under a normal situation where the power flows only one way, nothing, as the power's been cut off at the transformer upline. Once he's done and has moved to a safe distance, the power company turns the transformer back on and life continues. However, if my excess power is being fed back in to the grid, SURPRISE! The line is live the instant the final connection is made. The lineman gets a nasty (and likely fatal) shock.
This is why inverters have low voltage cutoffs. UL and IEEE have rules and standards to prevent inverters from islanding and harming repairmen. Many systems that intertie into the power grid require these cutoffs so that when the powerline drops to zero the inverter won't feed power to the lines. This has been worked out quite well already.
IEEE's Xplore has an article on this, "Virtual inductor-based islanding detection method for grid-connected power inverter of distributed power generation system" [only a summary].
Falcon
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Re:partner learning
There is precious little research to date comparing the efficiency of two skilled and experienced programmers doing full-time pair programming with what they produce working alone except when they feel the need to collaborate in real time, and what there is isn't nearly as favourable.
One interesting data point is the study Evaluating Pair Programming with Respect to System Complexity and Programmer Expertise by Erik Arisholm et al. from Simula Research Laboratory, published in the February 2007 issue of Transactions on Software Engineering. There's a good summary on the Catenary blog.
This study is more realistic in that the research subjects were professional Java consultants, rather than college students. However, it appears the study did not allow the subjects to collaborate with anyone outside the pair (or at all, for the solo subjects).
The abstract of the study:
A total of 295 junior, intermediate, and senior professional Java consultants (99 individuals and 98 pairs) from 29 international consultancy companies in Norway, Sweden, and the UK were hired for one day to participate in a controlled experiment on pair programming. The subjects used professional Java tools to perform several change tasks on two alternative Java systems with different degrees of complexity. The results of this experiment do not support the hypotheses that pair programming in general reduces the time required to solve the tasks correctly or increases the proportion of correct solutions. On the other hand, there is a significant 84 percent increase in effort to perform the tasks correctly. However, on the more complex system, the pair programmers had a 48 percent increase in the proportion of correct solutions but no significant differences in the time taken to solve the tasks correctly. For the simpler system, there was a 20 percent decrease in time taken but no significant differences in correctness. However, the moderating effect of system complexity depends on the programmer expertise of the subjects. The observed benefits of pair programming in terms of correctness on the complex system apply mainly to juniors, whereas the reductions in duration to perform the tasks correctly on the simple system apply mainly to intermediates and seniors. It is possible that the benefits of pair programming will exceed the results obtained in this experiment for larger, more complex tasks and if the pair programmers have a chance to work together over a longer period of time. -
Re:Alerts when speeding?
It's a neat idea, but only if it's absolutely perfect. And is -anything- perfect?
Sure, it may not be perfect. But neither are people and the condition of the road and weather.
Two modes are investigated: in the 'map generation' mode, the lane detection system is used to generate a map under good weather, lighting, and traffic conditions; in the 'map use' mode, it is used as a driving assistance system and can rely on the previously generated map to improve the results of detection. The lane detection system is used along with a low cost GPS in both modes. Experimental results show that using the map can improve the detection of the road lane under adverse conditions (occlusions generated by traffic, degraded lane markings, bad weather like fog). Moreover the use of the map can help avoiding false detections and increasing the detection range of the system
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Re:We should be reprocessing anyway.
Quite a bit about the situation in France in this article:
http://www.spectrum.ieee.org/print/4891
They are currently only using the reprocessed fuel in traditional reactors (or storing it); this leads to more "hot" radioactive material, not less. There is reason to believe that they will eventually start burning it up, but currently, they are not.
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Re:The Strategic National Plutonium Reserve
If you aren't going to stabilize the waste, there really isn't a great deal of need to ship it somewhere central, you can just leave it at the reactor sites (or do regional collection if security is something that people get worried about).
One issue is that reprocessing hasn't been all that successful in France:
http://www.spectrum.ieee.org/print/4891
The crux of it is that breeder reactors don't work yet.
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This is not flash ram
First, the real links. I don't know why the blogger didnt't include them, and I don't think this should have gone on the front page without them. Oh well, there's always the comments...
Novel Ferroelectric NAND Flash Memory Cell Demonstrates 10000 Times More Program and Erase cycles than Conventional Memory Cells (AIST press release, surprisingly science-dense).
Highly Scalable Fe(Ferroelectric)-NAND Cell - contribution to the Non-Volatile Semiconductor Memory Workshop, 2008 (you may have access to only the abstract).
This is NOT flash ram, it's ferroelectric RAM. This doesn't matter much to the consumer who can use it much the same way, but it's a different principle. Apparently they've (semi-)tested 100 million r/w cycles, and expect that it can hold data for 10 years (extrapolated from some curve). Besides, it uses a lower voltage than flash, and they expect it to scale down further. Nice. It even looks like it might work. SSDs for teh win :-) -
Re:I had a lot of questions...
The paper showed up. Apparently it makes use of the Kerr effect. I'm speculating that it's more specifically kerr-lens modelocking.
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IEEE article on wave power generatorsThe July issue of IEEE Spectrum (hitting mailboxes in the last couple days) has an article about this, with a really cool picture.
"The first commercial ocean energy project is scheduled to launch this summer off the coast of Portugal. Three snakelike wave-power generators built by Edinburgh's Pelamis Wave Power will deliver 2.25 megawatts through an undersea cable to the Portuguese coastal town of Aguçadoura. Within a year, another 28 generators should come online there, boosting the capacity to 22.5 MW. That may be a trickle of power, but the project represents a new push into wave and tidal power as governments eye the oceans as a way to meet their renewable energy targets."
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Important article
If you haven't read TFA at http://www.spectrum.ieee.org/print/3673 , kindly do so. It makes some pungent observations, frex this one, which pretty much says it all:
"Copyright is being turned from a limited-term incentive designed to encourage creative artists to a broadly scoped transfer of wealth from the public to the private realm. As the industries that generate copyrighted materials seek control over not only their works but also the devices on which we watch, listen to, and remix them, copyright law is turning into technology regulation."
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Re:Interersing trend... in 1985France's engineers tried harder than those in any other country to build and run breeder reactors reliably at a commercial scale, but ultimately they failed. The result is that even in France--the best real-world model of what reprocessing can accomplish--the technology remains a tantalizing but only partial solution to the problem of high-level nuclear waste.
http://www.spectrum.ieee.org/print/4891
(My point is not that it can not work, it is that it is not ready yet...)
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Electromagnetic Compatability Study Needed
Electromagnetic compatability is a huge undertaking in the hardware world.
As an example, IEEE EMC society:
http://www.ewh.ieee.org/soc/emcs/I would be very curious to know if any EMC work was done between all of theses devices? Nothing indicated of substance in the article.
my 20 cents (adjusted for inflation and to account for the energy costs per post)
:)
jerry -
I would also suggest skylights.
Light tubes like the Solatube would come in handy here. However with a battery bank work could be done when it's dark. Last year or the year before IEEE's "Spectrum" had an article on how people in South Asia have been able to increase their income by buying a solar panel and batteries which allows them to do some work when dark. And the panels generate more income because they are made locally creating jobs. Ump, I just searched the site but didn't find anything, maybe it's only in the print edition.
Honda also makes some super quiet generators that are less of a pita than solar.
I'd only use generators as a backup, even when converted to run on alcohol or methane.
Falcon -
Re:misleading title...
Since the full paper doesn't look like it's available yet, it's not clear how much they can identify - but a similar research (e.g. this paper) is able to identify certain words (from a limited vocabulary) during an encrypted conversation. It's not the same as listening to a decrypted stream obviously - but it highlights the vulnerability to traffic analysis - this is revealing much more information than simply the existence of a conversation between two people - it can reveal at least some of the contents of that conversation.
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Re:Consider the source
This is
./. That means that TFA is an empty placeholder or, at best, pointing to a vapid bit of text between ads.
In this case however, a few levels down it appears that the science behind the journalism is decent enough, for instance:
http://www.sciencemag.org/cgi/content/abstract/300/5625/1560
and
http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1645290 -
Re:Google is not to be trusted
The UK is working on a massive centralized database of health records called NPfIT. Aside from all the typical delays and cost overruns of deploying a massive new IT system, there is widespread concern about privacy among citizens. It will be very interesting (and easy) for Americans to sit back and watch how it pans out. I have an in-law who was fired from a nice hospital job for unauthorized access of patient records (she was showing a friend hoping to get hired on how they file things), which showed me both that 1) privacy concerns are real, and 2) institutions take the matter seriously, at least in some cases.
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Re:Google is not to be trusted
The UK is working on a massive centralized database of health records called NPfIT. Aside from all the typical delays and cost overruns of deploying a massive new IT system, there is widespread concern about privacy among citizens. It will be very interesting (and easy) for Americans to sit back and watch how it pans out. I have an in-law who was fired from a nice hospital job for unauthorized access of patient records (she was showing a friend hoping to get hired on how they file things), which showed me both that 1) privacy concerns are real, and 2) institutions take the matter seriously, at least in some cases.
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How comp-sci of you to think that...computers are unreal. Virtual-reality and real-reality is only a distinction they would make. Artificial flavoring is still reality, and so are artificially simulated computer environments.
Ray Kurzweil and Neil Gershenfeld: Two Paths to the Singularity For years, Dalrymple has been trying to reconcile these two visions of the future: Gershenfeld's future in which computers collapse and simply become part of reality, and Kurzweil's future in which reality as we know it collapses and simply becomes part of computers. In an e-mail exchange prompted by a lunchtime discussion in Gershenfeld's laboratory during which another student referred to Kurzweil's work, Dalrymple asked his mentors, "Is it possible for both to happen at the same time?" Why is it happening at the same time? Because they are working on it at the same time. And why do their paths meet? Because they are working on the same problem. The distinctions they make are distinctions within the realm of what they are doing, and outside of it, they are all the same.
This is the kind of science talk that makes an uninformed non-scientist believe in Terminators. Of course, they know that, and the overdramatization is only an act, or a "dance" if you will. Their conclusion is quite boring: The result for me has been an increasingly close integration of physical science and computer science, bringing the programmability of the digital world to the physical world. But whether computers are merged with reality or reality is merged with computers, the result is the same: the boundary between bits and atoms disappears. Meaning, "We will advance, and eventually get there." But they won't say that, because that is already the underlying premise. Hence, it is about how you can make it sound interesting, not just for the reader, but for yourself, so you'd continue to find interest in what you are doing. Which of course is only natural. As is my dissertation on why this article is boring, just so I don't feel I wasted my time reading a boring article. -
Re:Long weekend...
OK - the OP phrased it badly, but the first 24 bits of the MAC address do give vendor information - some drivers allow you to override that, but allowing for some terminological inexactitude, the OP made sense.
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IEEE Computing
The work of their various Councils and Societies encompasses a large number of projects, to include Open Source projects.
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Comments by Schneier
This article in IEEE Spectrum contains more details and comments from Bruce Schneier and others.
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Re:Nuclear power plants
The disposition of nuclear waste is a political problem, not a technical one.
Tell that to the French where many people support nuclear power.
Nobody's suggesting that we don't use the available wind, geothermal, or tidal power. If that's not sufficient,
Ah but those alternatives are sufficient. Sciam, "Scientific American", published "A Solar Grand Plan" that details how solar power can provide 69% of the US's energy needs by 2050. If that isn't enough the DOE's National Renewable Energy Laboratory published the Wind Energy Resource Atlas of the United States showing the wind resources the US has, which is a lot. The Rocky has enough potential wind power to provide the 48 contiguous states with most if not all the energy needed. Another good energy source, in some locations, is Geothermal. Fact is is alternative energy sources like those above can provide the US with all of it's energy needs easily, technologically speaking.
Falcon -
Re:I'll admit I don't understand the classificatioI couldn't find this paper, but searching on the web I found the original paper that references. (Sorry, you have to be an IEEE member to read it.) It describes the relationships you mention. I hadn't heard of the memristor before. I'm used to dealing with circuit equations of voltage, current, and charge. I haven't dealt with magnetic flux since college.
Anyway, the concept is neat. But one problem I had is that the paper says that the memristance (M) needs to change with charge (or flux) to be interesting. But the other fundamental elements (R = dv/di, C = dq/dv, and L = dphi/di) all have basic components that assume it's fixed. Circuits using resistors, capacitors, and inductors all assume the R, C, and L are fixed, except in special cases where it is explicitly says otherwise. So why does a memristor get to have a changing M value? Supposedly because if it didn't it would just look like a resistor and would be a boring element. But I think there must be more to it. But so far I haven't figured it out.
Thanks for your explanation.
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Re:Advice from law enforcementThe police and FBI don't like to talk about it, but there is a program where if they input a digital photo of someone, even a poor quality one, the computer will compare it against the database of digital photos taken by the Department of Motor Vehicles and spit out the six closest matches.
These system rely on facial characteristics like eye-nose-mouth ratio, hairlines, etc so as long as the computer can accurately calculate the centers of these areas, it works. The FBI doesn't need to talk about these programs. There are many papers published by the IEEE on face recognition, just search on IEEE Xplore (assuming you're an IEEE member). You are correct in that most algorithms require a straight-on view though.
I know a student at my school who is working on his Master's degree in Computer Engineering. He's investigating face derotation. That's taking an image of a person's face and manipulating it into a straight-on view. -
Re:This Really Isn't anything New
I attend UCF, and will be starting my graduate degree in the Fall semester after attending graduation next week. This is old news.
When I started attending UCF for my EE, this had already been done. I have recently completed (last Thursday) Dr. Wu's class on Genetic Algorithms (Evolutionary Computation). This work was used by (grad) students as a starting point for their research for the class project.
Let me express how this is old news.
2003 - http://www.springerlink.com/index/M26H2CEEAGWG4FD5.pdf
1993 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=410654
1999 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=785430
2002 (quantum cicuits) - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1029883
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1217659
1998 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=685786
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1323832
2002 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1004425
1998 - http://www.springerlink.com/index/71ub9hh22qrlx5lk.pdf -
Re:This Really Isn't anything New
I attend UCF, and will be starting my graduate degree in the Fall semester after attending graduation next week. This is old news.
When I started attending UCF for my EE, this had already been done. I have recently completed (last Thursday) Dr. Wu's class on Genetic Algorithms (Evolutionary Computation). This work was used by (grad) students as a starting point for their research for the class project.
Let me express how this is old news.
2003 - http://www.springerlink.com/index/M26H2CEEAGWG4FD5.pdf
1993 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=410654
1999 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=785430
2002 (quantum cicuits) - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1029883
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1217659
1998 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=685786
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1323832
2002 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1004425
1998 - http://www.springerlink.com/index/71ub9hh22qrlx5lk.pdf -
Re:This Really Isn't anything New
I attend UCF, and will be starting my graduate degree in the Fall semester after attending graduation next week. This is old news.
When I started attending UCF for my EE, this had already been done. I have recently completed (last Thursday) Dr. Wu's class on Genetic Algorithms (Evolutionary Computation). This work was used by (grad) students as a starting point for their research for the class project.
Let me express how this is old news.
2003 - http://www.springerlink.com/index/M26H2CEEAGWG4FD5.pdf
1993 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=410654
1999 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=785430
2002 (quantum cicuits) - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1029883
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1217659
1998 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=685786
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1323832
2002 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1004425
1998 - http://www.springerlink.com/index/71ub9hh22qrlx5lk.pdf -
Re:This Really Isn't anything New
I attend UCF, and will be starting my graduate degree in the Fall semester after attending graduation next week. This is old news.
When I started attending UCF for my EE, this had already been done. I have recently completed (last Thursday) Dr. Wu's class on Genetic Algorithms (Evolutionary Computation). This work was used by (grad) students as a starting point for their research for the class project.
Let me express how this is old news.
2003 - http://www.springerlink.com/index/M26H2CEEAGWG4FD5.pdf
1993 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=410654
1999 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=785430
2002 (quantum cicuits) - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1029883
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1217659
1998 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=685786
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1323832
2002 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1004425
1998 - http://www.springerlink.com/index/71ub9hh22qrlx5lk.pdf -
Re:This Really Isn't anything New
I attend UCF, and will be starting my graduate degree in the Fall semester after attending graduation next week. This is old news.
When I started attending UCF for my EE, this had already been done. I have recently completed (last Thursday) Dr. Wu's class on Genetic Algorithms (Evolutionary Computation). This work was used by (grad) students as a starting point for their research for the class project.
Let me express how this is old news.
2003 - http://www.springerlink.com/index/M26H2CEEAGWG4FD5.pdf
1993 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=410654
1999 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=785430
2002 (quantum cicuits) - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1029883
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1217659
1998 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=685786
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1323832
2002 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1004425
1998 - http://www.springerlink.com/index/71ub9hh22qrlx5lk.pdf -
Re:This Really Isn't anything New
I attend UCF, and will be starting my graduate degree in the Fall semester after attending graduation next week. This is old news.
When I started attending UCF for my EE, this had already been done. I have recently completed (last Thursday) Dr. Wu's class on Genetic Algorithms (Evolutionary Computation). This work was used by (grad) students as a starting point for their research for the class project.
Let me express how this is old news.
2003 - http://www.springerlink.com/index/M26H2CEEAGWG4FD5.pdf
1993 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=410654
1999 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=785430
2002 (quantum cicuits) - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1029883
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1217659
1998 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=685786
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1323832
2002 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1004425
1998 - http://www.springerlink.com/index/71ub9hh22qrlx5lk.pdf -
Re:This Really Isn't anything New
I attend UCF, and will be starting my graduate degree in the Fall semester after attending graduation next week. This is old news.
When I started attending UCF for my EE, this had already been done. I have recently completed (last Thursday) Dr. Wu's class on Genetic Algorithms (Evolutionary Computation). This work was used by (grad) students as a starting point for their research for the class project.
Let me express how this is old news.
2003 - http://www.springerlink.com/index/M26H2CEEAGWG4FD5.pdf
1993 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=410654
1999 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=785430
2002 (quantum cicuits) - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1029883
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1217659
1998 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=685786
2003 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1323832
2002 - http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=1004425
1998 - http://www.springerlink.com/index/71ub9hh22qrlx5lk.pdf -
Re:How about some details?
Eh, to do POE it better run at a LOT less than 30-50W, 802.3af only offers 12.95W (37V @ 350mA = 12.95W, 48V @ 270mA = 12.95W link ) guaranteed power.
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Re:I can't say this enough....
Try downloading a fairly recent (published after 2000-2002) paper on computer vision or image processing. Most sites need a registration fee and only work with organizations (e.g. http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=621386).
Even some standards can't be downloaded without paying and registration, for example T.38. -
Re:Stop motion moviesRay tracing is great for static scenes. But movement is the key to games that require this much detail, and so each frame should not be beautifully rendered framebuffers, but a mix of several framebuffers over the span of one frame. No, no, no! Mixing several framebuffers together gives you *lousy* motion blur. You'll get severe artifacts from each pixel using the same set of uniform samples in the time domain -- very fast moving objects can appear cloned in multiple places, for example.
Honestly, ray tracing has been getting motion blur right since 1984. Not to mention that it can even simulate the effect of camera shutters. -
Re:Lies
...or not lies? See, for example, evidence in the article cited below of potential problems.
The question is, if there are regulatory issues to be worked out, do you just go ahead and roll the dice in the meantime?
Unsafe At Any Airspeed?
By Bill Strauss, M. Granger Morgan, Jay Apt, and Daniel D. Stancil
http://www.spectrum.ieee.org/mar06/3069
Excerpt outling some of the reasoning why problems can occur:
"Consumer devices that meet FCC emission limits can exceed safe interference limits set by the FAA for avionics, because the FCC and the FAA do not harmonize their regulations. A 2003 study of cellular telephones by NASA highlighted the problem. On the one hand, the study found that of eight cellphones tested (four CDMA and four GSM), no individual unit would be likely to interfere with any of the commonly used aircraft navigation radio systems, although there was still some potential for interference in worst-case scenarios. However, the same study determined that spurious emissions from cellular phones at the allowable FCC limits would cut dangerously into safety margins for avionics, even when considering "reasonable minimum" radio receiver interference thresholds. More troubling, the study found that intermodulation between some cellular phones caused emissions in the frequency bands used by an aircraft's GPS and distance-measuring equipment. The report identified other combinations of common passenger transmitters that could potentially produce intermodulation effects in aircraft communication and navigation RF bands. "
Also:
"Our data and the NASA studies suggest to us that there is a clear and present danger: cellphones can render GPS instrument useless for landings. Clearly, the cause of the problem is that the FCC issues RF emission standards for consumer electronics, conferring only minimally with the FAA and with no formal consideration of the implications of those standards for the aircraft environment. For its part, the FAA relies on the airlines to initiate safety plans and, like other government agencies, defers to the FCC on questions of electromagnetic radiation.
" -
Here's how he's qualifiedTo answer those who say, "What does some guy who invented an algorithm know about nuclear war," (1) IEEE Spectrum checked Hellman's claims with 2 reliable, independent experts and (2) A long list of people who do know about nuclear war signed on to his claims. You might take seriously the former director of the CIA, the former president's science advisor, 2 Nobel laureates, and the (Republican) former head of the FDA.
(But that is a reasonable question -- you get points for skepticism.)
This teaches 2 related lessons about journalism and science:
(1) There are 2 kinds of publications in the world -- those that check their facts and those that don't. The first are reliable; the second aren't. This is why some obscure guy publishing a blog can be more reliable than most major newspapers and TV stations. (Or in this case, why IEEE Spectrum is more reliable than most daily newspapers.)
(2) There are 2 kinds of scientists in the world -- those who gather a consensus of experts before going public, and those who don't. The first are reliable; the second aren't. (This is why that story recently about cell phones causing brain cancer by an Australian neurologist was complete bullshit.) Hellman is competent enough in science to know that.
According to TFA http://www.spectrum.ieee.org/apr08/6099
Hellman's method isn't unfamiliar to those trying to gauge the risk of failure for complex systems, such as nuclear reactors. IEEE Spectrum asked J. Wesley Hines, a professor of nuclear engineering at the University of Tennessee, to examine Hellman's methods, which were detailed in the appendix of the Bent article. "I only read the appendix but feel his argument is rational and also feel his methods are justified," says Hines. "Some could argue with the numbers he used, but he does give logical reasons for using those numbers and admits that they have large uncertainties since the events have been rare in the past."
Robert N. Charette, who runs the risk-management consultancy ITABHI and is a regular contributor to IEEE Spectrum, agrees with Hines. However, he says Hellman should have also turned the analysis on its head. "The other side of the risk equation is, suppose you get rid of nuclear weapons. Does that increase the probability of war? Pretending there aren't any nukes, how many wars would we have had?"
And the signers http://nuclearrisk.org/statement.php The above statement has been endorsed by the following Charter Signers:*
Prof. Kenneth Arrow, Stanford University, 1972 Nobel Laureate in Economics; see also Nobel Announcement
Mr. D. James Bidzos, Chairman of the Board, Verisign Inc.
Dr. Richard Garwin, IBM Fellow Emeritus, former member President's Science Advisory Committee and Defense Science Board; see also NY Times article
Adm. Bobby R. Inman, USN (Ret.), University of Texas at Austin, former Director NSA and Deputy Director CIA
Prof. William Kays, former Dean of Engineering, Stanford University
Prof. Donald Kennedy, President Emeritus of Stanford University, former head of FDA
Prof. Martin Perl, Stanford University, 1995 Nobel Laureate in Physics; see also Nobel Announcement
(BTW, here's a tip for any student. You used to be able to get a student membership in the IEEE, which includes a subscription to Spectrum and another (expensive) IEEE magazine of your choice, for some ridiculously low amount like $12 a year. It's a great deal for the magazines alone, although IEEE membership has even better benefits that most students don't even know about.) -
Yeah, that sounds like a veritable
I see one big problem with TFA. It talks about how Utah taxpayers subsidized Utopia yet it does not acknowledge the billions of taxpayer dollars government already gave to the telcos and cablecos to buildout a broadband infrastructure the companies never built. Question, would you also like airlines to build and pay for their own airports as well? Here's an appropriate quote from Paul Morris, Utopia's executive director:
"It would be absurd for each airline to build its own airport," he says. "But that's just what we've been doing for telecommunications. Qwest has its set of wires in the ground, and Comcast"--the dominant cable provider in the region--"has its own. We think it makes sense for a city or a region to build the airport, have someone operate it, and let as many airlines provide service as want to."
Falcon -
Consider: cell phones.
And cellphones can do broadband?
Consider: connectivity that doesn't use 'landlines' or tip-and-ring technology, rather, symmetrical fibre and local digital infrastructure (not DSL).
Fiber isn't landline? It may be glass instead of copper but it still requires the same right of way and even more labour to install.
Get rid of the monopolies and governmental sanctioned phone-mafias.
Agreed, however the problem is in the details. For instance someone has to pay to build then maintain and own the infrastructure. What might work is to separate the ownership of the infrastructure from offering the services it is capable of delivering. Such an approach is being implemented as part of A Broadband Utopia in northeastern Utah, here's an update abet almost a year old. One person in the article says it is operated like an airport, airliners don't build their own, instead usually the airport is built and owned by the government who then leases gates to the airlines.
Falcon -
Consider: cell phones.
And cellphones can do broadband?
Consider: connectivity that doesn't use 'landlines' or tip-and-ring technology, rather, symmetrical fibre and local digital infrastructure (not DSL).
Fiber isn't landline? It may be glass instead of copper but it still requires the same right of way and even more labour to install.
Get rid of the monopolies and governmental sanctioned phone-mafias.
Agreed, however the problem is in the details. For instance someone has to pay to build then maintain and own the infrastructure. What might work is to separate the ownership of the infrastructure from offering the services it is capable of delivering. Such an approach is being implemented as part of A Broadband Utopia in northeastern Utah, here's an update abet almost a year old. One person in the article says it is operated like an airport, airliners don't build their own, instead usually the airport is built and owned by the government who then leases gates to the airlines.
Falcon -
Re:Govt Regulation == Bad
There are (aptly-named) alternatives: http://spectrum.ieee.org/may06/3434
However, it seems that municipalities and provinces would once again have to do the badly-needed work that this government refuses to do. -
Re:Great vaporware application
There are techniques for extracting higher quality data from overlapping low-resolution data sets.
Yes and no. If your low-resolution images are properly acquired, that with with no aliasing, you're fucked. Aliasing means frequency components higher than half the sampling rate/camera resolution are not being filtered out prior to quantization by, in our example, the camera's CCD.
You're usually still good - the average energy is still distributed the correct place. Aliasing is only an issue for "single point" sampling; if the sample covers an average over a time period or an area, you're still getting an energy increase in the average for that area.Here's a paper covering the area: High-resolution image reconstruction from multiple low-resolutionimages; it's the 6th hit on Google for a search for "high res from many low res images". Note that you can even do this from JPEG-compressed images: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1006080.
Noise elimination is a relevant part of the problem, because there is always noise in the low-res images.
Eivind.
-
Re:Great vaporware application
There are techniques for extracting higher quality data from overlapping low-resolution data sets.
Yes and no. If your low-resolution images are properly acquired, that with with no aliasing, you're fucked. Aliasing means frequency components higher than half the sampling rate/camera resolution are not being filtered out prior to quantization by, in our example, the camera's CCD.
You're usually still good - the average energy is still distributed the correct place. Aliasing is only an issue for "single point" sampling; if the sample covers an average over a time period or an area, you're still getting an energy increase in the average for that area.Here's a paper covering the area: High-resolution image reconstruction from multiple low-resolutionimages; it's the 6th hit on Google for a search for "high res from many low res images". Note that you can even do this from JPEG-compressed images: http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1006080.
Noise elimination is a relevant part of the problem, because there is always noise in the low-res images.
Eivind.
-
Re:There could be a serious benefit
-
Only half of the story.
Some very intelligent researchers at the Institute of Physics' Condensed Matter and Material Physics Conference came to some very intelligent decisions about the future of CPU's... but this is hardly the end of the silicon chip.
In addition to some of the points made by other posters (Silicon CPU's will live on in smart systems, cheap systems, handheld systems, etc.), there is a whole world of silicon chips that are *not* CPU's! Analog and mixed signal circuits need highly linear devices--not just switches that turn on and off--which current silicon technology provides wonderfully. Our current analog design technology has nowhere near exhausted the possibilities on the tapestry that ten/twenty year old silicon fabrication technologies provide.
Maybe graphene, nanotubes, or the Next Big Thing will change the high performance CPU niche, but silicon still provides everything we can manage to use for the rest of the IC world.
Besides, I bet that graffiti will be quite a challenge with nanotubes. -
Re:Lay off the weed, man!
It's not as if RF energy is something we've just discoved in that last 5 years.
People have been studying this for quite a while, some of them want it deliberately use it to cause harm to other people.
This isn't string theory, this is well understood science.
If you know something everybody else doesn't know, get it published in a peer-reviewed technical journal.
If not start reading up on the subject.
You may be particularly interested in EHS. -
Re:Lay off the weed, man!
It's not as if RF energy is something we've just discoved in that last 5 years.
People have been studying this for quite a while, some of them want it deliberately use it to cause harm to other people.
This isn't string theory, this is well understood science.
If you know something everybody else doesn't know, get it published in a peer-reviewed technical journal.
If not start reading up on the subject.
You may be particularly interested in EHS.