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Comment: Re:Free parameters not the issue: SM is wrong! (Score 1) 108

by slew (#44045025) Attached to: First Particle Comprising Four Quarks Discovered

As a non-physicist, my understanding of the Higgs mechanism is pretty weak, but...

The way I understand it the generic idea of the Higgs mechanism isn't simply restricted to be a "mass-generating" mechanism, although the most interesting Higgs mechanism that are searched for are the ones that can suggest electro-weak symmetry breaking which gives non-zero rest masses to W and Z bosons. The reason why most folks are searching for something that can describe this is that W and Z boson have the largest masses (~85x a proton) whereas a simplistic assumption of symmetry in the electric and weak fields would imply that these particles have zero-mass.

The generic Higgs mechanims pre-supposes a field (which exists everywhere there is the effect). Simplistic assumptions of convervation properties of the field manifest themselves as certain symmetries (which imply other symmetries and can be put into a mathematical framework similar to gauge groups, but that's not too important). The question becomes since the classical equations describe a mass-like scalar term that seems to be independent of the gradients and couples to these fields, how can we put a mass-like term into a framework with all these symmetries, yet be have it be non-zero?

The basic idea is that the field must have some sort of symmetry-breaking. At some high-energy (or temperature or potential), the expected value of the mass-like term averages out to zero, but as you go towards low-energy (or temperature, or potential), the expected value becomes non-zero yielding a mass-like term. As it turns out, if the potential of the field is shaped like a W or a sombrero, it can have this property. At high potential (when you can't see the "hat" part), the expection is symmetric around zero and the field has the required symmetry. As the potential goes down (including all the way to zero), the low-energy expectation value falls away from zero (at a consistent radius away from the center because of the "hat"). This is apparently called spontaneous symmetry breaking.

Why would the field potential have this shape? Who knows? But if it does, it can simultaeously satisfy the symmetries and still have a gradient/direction independent expected value term (which would act just like a scalar constant just like mass in all the classical physics formulas).

So what everyone is calling the Higgs field (and higgs particle) are mostly a specific interaction that describes how the W and Z boson can appear to have a non-zero mass-like term with electro-weak symmetry breaking. It is my understanding that it is currently just assumed that all other stuff that has non-zero mass would be similar, but it doesn't really explain what people think of as mass per-se (which has a mysterious gravitational equivalence), it just gives a explanation for the observations that are likely consistent with mass in terms of energy of the various fields (other than gravity).

Comment: Re:is this an open product? (Score 4, Interesting) 159

by slew (#44036733) Attached to: Google Enables VP9 Video Codec In Chromium

VP9 will be completely open. Just remember that creating video codecs is very complex process on its own, so adding things like encryption schemes will likely require a bunch of professional engineers.

I'm not sure what to take away from that statement about "professional engineers".

It seem like you implying that since VP9 didn't want/need "the community" (of presuably unprofessional folk) in its development that somehow the current developers of VP9 don't feel that "the community" can develop an encryption schemes (being the unprofessional folk we are)?

I gather that the Cathederal mechanism of development might be deemed necessary (by google) to avoid IP contamination of VP9, but as someone that does stuff in this area (video compression and encryption) professionally, what you seem to be implying is a bit condecending to "the community" of open source developers (many of whom are professional engineers in our day-jobs)...

In fact, I might argue that encryption schemes are best done in the community (e.g., like the AES and the SHA-3 process) because an open competitive environment is the best way to assure the actual difficulty of cirvumenting the scheme is known (rather than assuming that some experts have it figured out).

Comment: county fairs are doing this already... (Score 2) 27

by slew (#44033689) Attached to: High TechCarnival Aims To Entertain, Inspire, and Educate

http://www.sfexaminer.com/sanfrancisco/fair-is-taking-digital-leap/Content?oid=2442281
http://sanfrancisco.cbslocal.com/2013/06/13/hi-tech-exhibits-join-farm-animals-carnival-games-at-san-mateo-county-fair/

Among the additions this year are a 3-D printer, a Frisbee-throwing robot made by students at Aragon High School, and a "reverse-engineering" exhibit where kids can take apart VCRs and computers to see how they work. Colaluca also has organized competitions in coding and app-making, and he deputized employees of local computer companies to judge them.

Comment: Re:Why use DNA? (Score 1) 126

by slew (#44033047) Attached to: DNA Fog Helps Identify Trespassers, Thieves, and Brigands

Because there happens to already be a cheap way of amplifying a small sample of DNA for identification (PCR).
Most other easy to manufacture serializable microscopic substances mostly suffer from dillution/detection problems.

The technique is to use junk DNA encoded with a serial number. DNA are the is the microscopic grains and PCR is the way to quickly do the detection if a specific serial number is present (although PCR isn't yet as simple as a swab).

Presumably you could spend years doing revolutionary nobel prize winning research and replace DNA with another chemical that had an even cheaper way of detection for this niche application, but someone who worked for Applied DNA Sciences might instead think about just using DNA and an existing nobel prize winning PCR test and get something to market faster.... Just say'n... ;^)

Comment: Re:better summary (Score 1) 135

by slew (#44012533) Attached to: A350XWB, the Plane Airbus Did Not Want To Build, Makes Maiden Flight

the plane airbus did not want to build at the time, as they just blew up their budget on the A380 delay

FTFY...

Basically, Airbus's parent company (EADS) simply didn't want to invest that much of their own money on a new development and wanted to pressure the european governments into some sort of financing trick***. That didn't happen, so EADS reluctantly spent their own money on A350XWB development (and basically they have been mostly cash-flow negative since then which really puts a crimp on the value of the executive's stock options).

*** it's a bit complicated, but because of the WTO dispute with Boeing, the government can't really just give or loan the money to EADS for new development w/o triggering potentially expensive trade retaliation, but governments can loan money for something called "launch-aid" (temporary funding *after* development to finance inventory and supply chain buildup). It's always a bit suspicious when "launch-aid" loans happen before the development even starts (which seems to frequently happen with Airbus as they use the uncertaintly of location of jobs as enticements)...

Comment: Re:Supreme Court contradicts itself (Score 1) 209

by slew (#44006401) Attached to: Supreme Court: No Patents For Natural DNA Sequences

record=chromosome
song=the DNA in some specific person's chromosome
chord=mutated BRCA gene
diamond stylus=the cDNA technique to read DNA
laser pickup=some new way to read DNA

AFAIK the decision was that the "chord" is not patentable, because it's part of the naturally occurring "song".
However, since the current method to find if the "chord" is present in the "song" uses a "diamond stylus" pickup to read the "record" and is described in a patent, it might be patentable (they didn't address this in the ruling the issue of obviousness) since it uses a method to read the "song" which isn't a natural process. SCOTUS simply upheld the patent (it still can be re-examined).

The inference I made is that if someone else comes up with another way to detect the "chord" in the "song" that doesn't use a "diamond stylus" (say a "laser pickup" mechanism, or taking a picture of the groves on the record and having a computer recreate the audio), then the current patent is totally circumvented because SCOTUS says that it is not possible to patent nearly all possible uses of the "chord" (which is apparently what the patent tried to do). Unfortunately, everyone currently commonly plays "records" using a "diamond stylus" because that's the easy way to do it, so it apparently reads on their patent. However, that in itself might just make it obvious enough to invalidate their patent too, but easy and common does not necessarily make it "obvious" from a patent protection point of view (in fact some of the most valuable patents often illustrate how easy it is to do something new with an existing technique).

Also this inference I made doesn't address the issue of patentability of any specific methods to identify the "chord" in the "song" after you have read the "record" (which apparently is done with yet another common method and process which forms part of the diagnostics test that they tried to claim patent for). Maybe that part is "obvious" (in the patent sense) or easy to circumvent, but maybe not.

Comment: Re:Supreme Court contradicts itself (Score 1) 209

by slew (#44000829) Attached to: Supreme Court: No Patents For Natural DNA Sequences

The difference between mRNA and cDNA is splitting hairs.

I don't buy that arguement. Let's say you have a phonograph (vinyl record), with a song. You could patent a phonograph player with a diamond stylus that transcribed that phonograph back to an audible sound, because that isn't only way to do it, you could also have a different instrument (say a laser-pickup), that transcribed that phonograph back to an audible sound and that would be a different invention.

However, in this case they are trying to patent using a phonograph to see if there is a specific chord on that record. Just because, everyone uses a diamond stylus to transcribe the record today, doesn't mean that that process to identify a specific chord on a record using a diamond stylus is or isn't patentable. You need to look more at the details. It may be that it doesn't pass the "obvious to someone skilled in the arts" test, but it isn't just on the face of it unpatenable or a product of nature.

Comment: Re:The bigger news here... (Score 1) 209

by slew (#44000655) Attached to: Supreme Court: No Patents For Natural DNA Sequences

FWIW, Clarence Thomas has written nearly 500 Supreme Court opinions during his tenure.
A quick glance at a few years' statistics shows that he's often in the middle of the pack when it comes to writing opinions (both majority and dissenting)...

http://en.wikipedia.org/wiki/2012_term_opinions_of_the_Supreme_Court_of_the_United_States

Comment: Re:Wow (Score 1) 209

by slew (#44000375) Attached to: Supreme Court: No Patents For Natural DNA Sequences

I'd assume that you can, in fact, apply to patent anything;

In the US, alleged "perpetual-motion" machines get a special carveout. Since they want your application fee, accepting your patent application is merely a formality. However, the USPTO specifically requires a working model for machines claiming perpetual motion (and waives this requirement for all other types of patents).

The UK simply does not accept application for patents that claim processes contrary to well-established physical laws and specifically call out a "perpetual-motion" machine as an example of such a patent application that would be rejected.

Comment: Re:LaserDisc "brief"? (Score 3, Interesting) 134

by slew (#43992715) Attached to: The Trajectory of Television: A Big History of the Small Screen.

the release of DVD caused a collective groan due to the market confusion it created over whether its 480p was "hi-def" and the delay in HDTV standard that had been in the works since the 80's.

I don't think anyone called 480p "hi-def" (it is technically EDTV). Also, although the Japanese had MUSE/Hi-Vision and the Europeans had HD-MAC back in the 80's, they were both mostly analog HD broadcast systems that never really had a robust consumer media component (I doubt there were more than a hand-full of MUSE encoded HD laserdiscs titles...)

The MPEG standards track (that eventually became the digital HDTV standards) was "in-the-works" in the mid 90's (not the 80's). The MPEG-2 work originally targeted SD and was rushed by Hughes (for satellite tv) and the DVD folks to completion in 1996. Nobody was delaying anything in the standardization meetings as Hughes was clamoring to have the systems layered nailed down before they launched their direct broadcast satellites and the DVD folks wanted to launch products as soon as they could. For example, all the video "scalability" cruft that nobody uses in MPEG-2 were simply a concession to a few hold-outs to get the standard approved ASAP.

There was for a short time, a "MPEG-3" standard proposed targeting for HD after the MPEG-2 work was done, but none of the proposals were significantly better than MPEG-2 coding at HD resolution, so ***rather than delay*** digital HDTV rollout to develop something better, the MPEG-3 standardization effort was simply cancelled and the first digital HD standards were MPEG-2 based (both terrestrial and satellite).

Of course, eventually, the MPEG-4-AVC (aka H.264) was eventually developed (leveraging many of the tricks used by the video conferencing standards 'churn' creating an very complicated standard) and became the current defacto standard for HDTV (except for US terrestrial broadcast which is still MPEG-2 from the 90's)...

Comment: sig comment, off topic... (Score 1) 162

by slew (#43967549) Attached to: The Rails Girls Are Coming to a City Near You (Video)

The full quote of the origin of your sig... It seems to have a different tone when you read the full context...

Western civilization, it seems to me, stands by two great heritages. One is the scientific spirit of adventure – the adventure into the unknown, an unknown which must be recognized as being unknown in order to be explored; the demand that the unanswerable mysteries of the universe remain unanswered; the attitude that all is uncertain; to summarize it – the humility of the intellect. The other great heritage is Christian ethics – the basis of action on love, the brotherhood of all men, the value of the individual – the humility of the spirit.

These two heritages are logically, thoroughly consistent. But logic is not all; one needs one's heart to follow an idea. If people are going back to religion, what are they going back to? Is the modern church a place to give comfort to a man who doubts Godmore, one who disbelieves in God? Is the modern church a place to give comfort and encouragement to the value of such doubts? So far, have we not drawn strength and comfort to maintain the one or the other of these consistent heritages in a way which attacks the values of the other? Is this unavoidable? How can we draw inspiration to support these two pillars of western civilization so that they may stand together in full vigor, mutually unafraid? Is this not the central problem of our time?

Comment: Re:Someone start a defense fund (Score 1) 952

by slew (#43961367) Attached to: USA Calling For the Extradition of Snowden

Rep. Peter King should be impeached and prosecuted...

Since it appears that every member of congress and the president of the United states knew about this spying program with briefs from the intelligence agencies annual authorization and approved it, what say you about them? What makes Rep. King so special? The mere fact that he is one of the voices calling for extradition? his name? or his party affiliation?, or ...

Unless I'm mistaken, people are impeached and prosecuted for their ***crimes*** yet aren't people free to express the views that they want w/o being threatened with prosecution?

Or is this just some political rant you are going on about?

You need tender loving care once a week - so that I can slap you into shape. - Ellyn Mustard

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