Reginald L. Goodwin's Posts (3116)

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The Wrangling Begins...

Higgs Announcement at CERN

 




We have found it – now we have to work out exactly what "it" is. That neatly sums up the thoughts of many physicists at CERN yesterday as they began to absorb the announcement that the Large Hadron Collider (LHC) had discovered a Higgs boson – or at least something like a Higgs. CERN's director general Rolf-Dieter Heuer was very careful to describe the new particle, which has a mass of about 125 GeV/c2, as a "fundamental scalar boson". However, even the scalar part of that description – which indicates that the particle has zero spin – has not been completely nailed down.

 


The Scientific Method is a thought process, an accepted means of constantly questions itself in discoveries and published findings. It can be somewhat off-putting to the general public, used to definitive statements and cock-sureness (at least advertised by their political leaders). Although, I don't know if it's the scientists' fault (as Physics Today opines) more than we've become something our brains weren't designed for nor evolution intended: an entertainment culture addicted to instant gratification. What doesn't come easy to understand in seconds is quickly discarded instead of effort made to master. The Matrix was our undoing...

 

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On-Off Presto!...

So last month...but neat!Smiley

Credit: Technology Review

Today, Darran Milne and Natalia Korolkova at the University of St Andrews in Scotland outline another idea. These guys have worked out how to make an optical invisibility cloak that you can turn on and off.

What makes this possible is a process known as electromagnetically induced transparency--a phenomenon in which certain materials become transparent when zapped by light from two carefully tuned lasers.

This works for materials with atoms that can exist in three different electronic states--say a, b and, the highest, c. The idea here is that the first laser beam is absorbed by the material because it excites electrons from state a to state c. The second laser is also absorbed because it excites electrons from state b to state c.

If the frequencies of the lasers are close together, they can be tuned in a way that makes them interfere destructively. And when this happens, their ability to excite electrons cancels out.

When this happens, the laser photons suddenly pass through the material unimpeded, sometimes at dramatically reduced at speeds (which is how experiments that stop light are performed).

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Fiction and Science...

 

Homer Hickam's Amazon page

 


Bypasses are devices that allow some people to dash from point A to point B very fast while other people dash from point B to point A very fast. People living at point C, being a point directly in between, are often given to wonder what's so great about point A that so many people from point B are so keen to get there, and what's so great about point B that so many people from point A are so keen to get there. They often wish that people would just once and for all work out where the hell they wanted to be.”

 


Douglas Adams, The Hitchhiker's Guide to the Galaxy

 


“Man is an artifact designed for space travel. He is not designed to remain in his present biologic state any more than a tadpole is designed to remain a tadpole.”

 

 


“Science fiction is the most important literature in the history of the world, because it's the history of ideas, the history of our civilization birthing itself. ...Science fiction is central to everything we've ever done, and people who make fun of science fiction writers don't know what they're talking about.”

 

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Spray-On Batteries...

...I did not come up with the title.Smiley

Credit: Rice University

Imagine spray painting the side of your house and it not only produces power from the sun, but can store the energy for later as well. A novel approach to battery design from Rice University researchers could enable that and other types of spray-on batteries.

 

The research, published last week in Nature, seeks a new approach to battery fabrication by using materials that can be spray-painted onto various surfaces. Combined with flexible printed circuits and research in spray-on solar cells, the technique offers the prospect of turning common objects into smart devices with computing power and storage. Another possibility is consumer electronics, such as cell phones or cameras, with a battery coating.

 

Technology Review: Spray-On Batteries Could Reshape Energy Storage

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Fireworks!...


BBC: At meeting today in Geneva, CERN scientists announced that the Large Hadron Collider’s two main detectors, ATLAS and CMS, had collected data that are both statistically significant and consistent with properties of the Higgs boson. ATLAS detected a signal at a mass of 126 GeV/c2 (133 times the mass of the proton). The CMS value was slightly lower at 125.3 GeV/c2. Both signals met the 5σ threshold for a detection—that is, they were at least five times stronger than background fluctuations. Although the particle’s mass is about where Peter Higgs and other theorists predicted it would be, more data are needed to determine whether the particle is fully consistent with the so-called standard model of particle physics or whether it partakes of more exotic physics. Exotic or otherwise, the Higgs is not just another particle. According to those theorists, it’s responsible for giving other particles their masses.
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What Should Not Be...

Credit: Discover Magazine-Bad Astronomy, link follows

It’s generally said that discoveries in science tend to be at the thin hairy edge of what you can do — always at the faintest limits you can see, the furthest reaches, the lowest signals. That can be trivially true because stuff that’s easy to find has already been discovered. But many times, when you’re looking farther and fainter than you ever have, you find things that really are new… and can (maybe!) be a problem for existing models of how the Universe behaves.

 

Astronomers ran across just such thing recently. Hubble observations of a distant galaxy cluster revealed an arc of light above it. That’s actually the distorted image of a more distant galaxy, and it’s a common enough sight near foreground clusters. But the thing is, that galaxy shouldn’t be there.

More at: Bad Astronomy, Phil Plait

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Fireworks Wednesday?...

Image: CERN

SCIENTIFIC AMERICAN: Within a sliver of a second after it was born, our universe expanded staggeringly in size, by a factor of at least 10^26. That's what most cosmologists maintain, although it remains a mystery as to what might have begun and ended this wild expansion. Now scientists are increasingly wondering if the most powerful particle collider in history, the Large Hadron Collider (LHC) in Europe, could shed light on this mysterious growth, called inflation, by catching a glimpse of the particle behind it. It could be that the main target of the collider's current experiments, the Higgs boson, which is thought to endow all matter with mass, could also be this inflationary agent.


However...

 

TECHIE BUZZ:
The Higgs announcement
The announcement is expected to a big one – especially with the predicted discovery of the Higgs by the end of the year. The status of the Higgs will not be changed to ‘discovered’, but we will get to know how far we have actually reached.

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QCP-Tc...

Source: Science Daily


A new study published in Science examined a particular class of high-Tc superconductor, known as an iron pnictide. ("Pnictide" refers to an atom in the same column as nitrogen in the periodic table.) K. Hashimoto et al. found evidence of a quantum critical point (QCP): a place where the material's properties change radically due to quantum fluctuations rather than changes in temperature or pressure. While many physicists suspect the presence of a QCP in high-Tc superconductors, none have found unambiguous evidence for its existence. The current study is still not definitive, but the particular iron pnictide material the researchers used provides far cleaner data—and stronger hints that the QCP is actually there. Its presence would reveal a great deal about the inner workings of high-Tcsuperconductors, perhaps helping lead to even higher temperature superconducting devices.

In the case of high-Tc superconductors, the key parameters are temperature and doping. The iron pnictide superconductor in the recent study was BaFe2(As1-xPx)2, where "x" is the doping fraction. (In this case, the pnictide is the arsenic.) The researchers picked this particular pnictide due to the ease with which pure crystals of the material can be grown and how clean the resulting data is. For x values roughly between 0.2 and 0.7, BaFe2(As1-xPx)2is a superconductor; outside those values, the material isn't superconducting at any temperature.

A QCP—if it is present—marks another type of phase transition [beyond solid-liquid-gas-plasma], where quantum fluctuations at absolute zero change the superconducting behavior of the material. While absolute zero isn't experimentally achievable, the quantum fluctuations start at (relatively) higher temperatures, changing the behavior of the flow of the charge carriers.

 

Ars Technica:
Quantum fluctuations may uncover a clue to high-temperature superconductivity

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Level Playing Field...


Call it "Slippin' Into Darkness," part 2.

Research universities: that means major and Historically Black Colleges and Universities, Historically Hispanic Colleges and Universities, Historically Native American Colleges and Universities - ALL of us.

We've got to get beyond the partisan politics of Animal Farm, and actually, finally SOLVE problems for the long term versus score sound bites! How would it look in history, if we need a martial plan (in reverse): from Europe!?

 

NPR: "[Professors] are not the beneficiaries of large increases in college spending that has gone on," he says. "In fact, the percentage of all students taught by non-tenure-track professors — adjuncts, teaching assistants — has gone up and up and up."

 

"I'm sure that most of those people [provost, deans, assistant deans] are working hard at real jobs," he says. "But that doesn't necessarily mean that it's a good idea to increase spending and pass along many of those costs onto students in the form of higher tuition. ...

 

"And the more the prices go up, the more that these students who are squeezed out of opportunity are middle-income students, low-income students, and the net effect over time is to make our college and university system no longer the engine of economic mobility that it once was."

Rant done...

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Slippin' Into Darkness...


I was slippin' into darkness, yeah

When i heard my mother say

You've been slippin' into darkness

Oh oh oh oh

Pretty soon, you're gonna pay.

Yeah, yeah.

WAR, 70s funk band
National Research Council

 

US research universities face serious decline unless the federal government, states, and industry take action to ensure adequate, stable funding in the next decade, says a new report by the National Research Council. Universities must work harder to contain costs, enhance productivity, and improve educational pathways for students to careers both within and outside academia, the report says.

Written by a 21-member committee chaired by Bank of America chairman Charles Holliday Jr., the report responds to a request from Congress to recommend 10 actions that the nation should take in the next five to 10 years to maintain top-quality US research institutions. Among those steps, the committee urged, was that of doubling the budgets of NSF, the Department of Energy’s Office of Science, and NIST that was called for in the 2007 America Competes Act. But for fiscal 2013, the administration requested just a 4.8% increase for NSF, and a 2.4% increase for DOE’s Office of Science. Only the relatively tiny NIST R&D programs got the magnitude of increase needed to keep it on a doubling trajectory.


While federal funding for research has flattened or declined since onset of the recession, state funding for research universities has plunged by 25% to 50%, the committee found. Tuition increases at both private and public universities are threatening to put college education out of reach for many. At the same time, other countries have increased their R&D funding and are pouring significant resources into developing their own research institutions, patterned after US universities.
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Seeding Greatness...

Credit @ link below

TECHNOLOGY REVIEW: A couple of months back, we looked at the notion of time crystals, an idea put forward by Nobel-prize winning physicist Frank Wilczek and his pal Al Shapere.

These guys examined the fundamental properties of ordinary spatial crystals and asked why similar objects couldn't exist in the dimension of time instead.

One of the basic properties of spatial crystals is that they form when a system drops to its lowest possible energy state. They are not the result of adding energy to a system, but of taking it away. All of it.

Another basic property is that when these objects reach their lowest energy configuration, their symmetry breaks down. Instead of being the same in all directions, like the laws of physics, these objects become the same in only a few directions. It is this symmetry-breaking and the periodic structure it produces that defines crystals.

 

Wilczek and Shapere persuasively argued that there's no reason why similar periodic structures couldn't exist in time. And they said that finding them would give physicists a new way to study the process of symmetry-breaking and the laws of physics behind it.

 

There was just one problem, however. These guys hadn't worked out how to build a time crystal.

That changes today with the work of Tongcang Li at the University of California, Berkeley and a few buddies who say they've worked out how to do it. These guys say they know how to create an object in its lowest energy state that shows periodic structure both in space and time--a space-time crystal.
I had the pleasure of meeting Tongcang Li just before his PhD dissertation defense under Mark Raizen. This obviously builds on his research with the Raizen Group. This is amazing!

 

Physics arXiv: Space-time crystals of trapped ions

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Physics First-Agreed!...

Partnering Organizations

Physics is a gateway course for post-secondary study in science, medicine, and engineering, as well as an essential component in the formation of students’ scientific literacy. Physics classes hone thinking skills. An understanding of physics leads to a better understanding of other science disciplines. Physics classes help polish the skills needed to score well on the SAT and ACT. College recruiters recognize the value of taking high school physics. College success for virtually all science, computing, engineering, and premedical majors depends in part on passing physics. The job market for people with skills in physics is strong. Knowledge of physics is helpful for understanding the arts, politics, history, and culture.

Currently only 25% of Black and Hispanic high school students take any course in physics[1]. Thus many do not even get to the gateway. The availability of physics as a course for high school students is not equitably distributed throughout the United States. While some schools provide physics for all who wish to take it, a more common scenario, particularly for urban schools, is limited availability[2]. The existence of policies that restrict science opportunities for secondary students results in diminished outcomes in terms of scientific proficiency, and lack of diversity in the STEM professions.

First: before chemistry, before biology - it will aid in understanding, and build a solid foundation, even if participants don't pursue STEM careers.

 

Vector: National Alliance of Black Educators Endorses Physics First

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http://100yss.org/

 

There's also a Sci-Fi Symposium. Astronaut Mae Jemison, M.D. is chair.

 

100 Year Starship invites you to participate in the journey of a lifetime! On this mission, everyone has a seat – Thought leaders, experts, trendsetters, space advocates and space enthusiasts, international space agencies, established businesses and start-ups, financiers and entrepreneurs, governmental and non-governmental agencies, universities and private industries, including entertainment, medicine, education, the arts and athletics – and, of course, the general public. You are all invited to join us on a journey to improve our world today as we explore the challenge, benefits, potentially enabling technologies, strategies and awesome potential of interstellar flight to another solar (star) system.

From exotic propulsion systems, exoplanets and “where do we go?” to the social, economic and cultural considerations of “why or should we go?” there’s a technical or academic session just for you. In addition, workshops, classes, networking venues, the Expo, entertainment, celebrities, speakers and guests will enhance your experience and ensure that you have an opportunity to consider and contribute to the wide range of space and related topics needed to chart the research, design, development, policy, outreach and aspirational activities from which long-distance space travel will be generated.

 

Dear Friend,

We are pleased to invite you to submit to the “Call for Papers” the upcoming 100 Year StarshipTM 2012 Public Symposium to be held in Houston Texas on September 13 – 16, 2012.
 
The 100 Year StarshipTM (100YSSTM) considers broad and in-depth public engagement critical to accomplishing human interstellar flight within the next 100 years. The 100YSSTM Public Symposium is central to gathering and sharing knowledge, aspirations, capabilities, as well as building advocacy, imagination and momentum.  During the symposium space experts will participate in a platform for cutting-edge research, space enthusiasts will expand their knowledge, and the public will be engaged by an interactive exposition. 
 
The Symposium’s technical session issues this open call to individuals and organizations from all disciplines—amateur and professional—to contribute to understanding, developing and building the solutions needed for successful interstellar flight.
 
The 2012 Symposium’s theme, Transition to Transformation...The Journey Begins, acknowledges the accomplishments of space exploration to date and calls for authors to consider what changes are needed in how we currently envision and “do space” to truly push forward humanity’s journey to another star. Papers should focus upon those transformative ideas and processes within each track—science, technology and paradigms— that facilitate the breakthroughs in space exploration.There are four technical tracks at the Symposium and a series of special sessions as described in the 2012 100YSS Call for Papers
 
Papers accepted will be included in the 100YSS 2012 Symposium Proceedings.  Papers selected presented individually or as part of a panel as decided by each Track Chair. The Abstract Submission Deadline is June 30, 2012.  Authors whose papers have been submitted for presentation will be notified by July 29; and final papers must be submitted by August 17th.
 
If you have any questions, please contact the 2012 Symposium Technical Chair, Dr. Richard Obousy at richard.obousy@100YSS.org. We look forward to your participation in our symposium and hope that you will submit a paper.
Sincerely,

Mae Jemison, M.D.
Chair, 100YSS Symposium                                               
                                                                 
Richard Obousy, Ph.D.
Technical Chair, 100 YSS Symposium

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Afire and Brimstone...


Yes, cynicism is the stuff of skeptics, and skeptics tend not to write articles associating the physics community being "afire" - on fire; aflame; ablaze; eager and excited - about anything. Not to say they are not...
Wireddotcom

OK, I'll give you "eager and excited." But trust me: your eager and excited is not the typical labs' "eager and excited." I assume "keenly interesting data" would not sell good copy, nor take public interests off the NBA finals or the latest singing/dance off.

Kevin Durant needs about 10 - 20 lbs to contest LeBron, or any other man mountain's 60 lb advantage. That's just physics...

Postman's commentary (link to book follows) is described as a "21st century description in the 20th century." Published in 1985 - post the Orwell demarcation - cable news with CNN was just five years old. The Internet (not mentioned) was Zenith computer screens - big and bulky - sending the equivalent of what a teen can do with their thumbs and text messaging. There was no Facebook, Twitter, and blogging would have been the equivalent of exposing your diary to the world, of telling a freezing caveman about fire - Prometheus.

And: if there was such a thing as "reality TV," its impact was not as great as a book.


“We were keeping our eye on 1984. When the year came and the prophecy didn't, thoughtful Americans sang softly in praise of themselves. The roots of liberal democracy had held. Wherever else the terror had happened, we, at least, had not been visited by Orwellian nightmares.

But we had forgotten that alongside Orwell's dark vision, there was another - slightly older, slightly less well known, equally chilling: Aldous Huxley's Brave New World. Contrary to common belief even among the educated, Huxley and Orwell did not prophesy the same thing. Orwell warns that we will be overcome by an externally imposed oppression. But in Huxley's vision, no Big Brother is required to deprive people of their autonomy, maturity and history. As he saw it, people will come to love their oppression, to adore the technologies that undo their capacities to think.

What Orwell feared were those who would ban books. What Huxley feared was that there would be no reason to ban a book, for there would be no one who wanted to read one. Orwell feared those who would deprive us of information. Huxley feared those who would give us so much that we would be reduced to passivity and egoism. Orwell feared that the truth would be concealed from us. Huxley feared the truth would be drowned in a sea of irrelevance. Orwell feared we would become a captive culture. Huxley feared we would become a trivial culture, preoccupied with some equivalent of the feelies, the orgy porgy, and the centrifugal bumblepuppy. As Huxley remarked in Brave New World Revisited, the civil libertarians and rationalists who are ever on the alert to oppose tyranny "failed to take into account man's almost infinite appetite for distractions". In 1984, Huxley added, people are controlled by inflicting pain. In Brave New World, they are controlled by inflicting pleasure. In short, Orwell feared that what we hate will ruin us. Huxley feared that what we love will ruin us.

This book is about the possibility that Huxley, not Orwell, was right.”

From ― Neil Postman, Amusing Ourselves to Death: Public Discourse in the Age of Show Business
Wired: Physics Community Afire With Rumors of Higgs Boson Discovery

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Neuromorphic Chip...


So the race is on to develop a different kind of chip that more accurately mimics the way the brain works. So-called neuromorphic chips must be built from devices that behave like neurons—in other words they transmit and respond to information sent in spikes rather than in a continously varying voltage.
Credit: Technology Review

ABSTRACT: We present a design-scheme for ultra-low power neuromorphic hardware using emerging spin-devices. We propose device models for 'neuron', based on lateral spin valves that constitute of nano-magnets connected through metal-channels. Such magneto-metallic neurons can operate at ultra-low terminal voltage of ~20 mV, resulting in small computation energy. Use of domain wall magnets as programmable 'synapse' and as 'integrating-neurons' is proposed. Magnetic tunnel junctions are employed for interfacing the spin-neurons with charge-based devices like CMOS, for large-scale networks. Device-circuit co-simulation-framework is used for simulating such hybrid designs, in order to evaluate system-level performance. We present the design of different classes of neuromorphic architectures using the proposed scheme that can be suitable for different applications like, analog-data-sensing, data-conversion, cognitive-computing, associative memory, programmable-logic and analog and digital signal processing. We show that the spin-based neuromorphic designs can achieve 15X-300X lower computation energy for these applications, as compared to state of art CMOS designs.

 

Physics arXiv: Proposal for Neuromorphic Hardware Using Spin Devices

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