Reginald L. Goodwin's Posts (3119)

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Relativity Strikes Back...


So much for the coolness of near, or at light speed travel.

I'd probably just stay in the Hollow Deck until we got where the ship was going...

You're on board the Millennium Falcon. You give the command to jump to light speed. The stars outside turn into long streaks of light and you're off. It's one of the most memorable images of sci-fi space travel ever created. It's also likely to be pretty far from reality, according to a study by a group of students from the U.K.'s University of Leicester.



The study, titled "Relativistic Optics Strikes Back," was published in the University of Leicester's Journal of Physics Special Topics. You can indulge in all the delicious physics equations in the abstract.



The physics students started by imagining that the Millennium Falcon has accidentally wandered into our solar system, on a direct course for our sun. If it then engaged in near-light speed travel, the stars around it wouldn't appear to stretch out. Instead, it would look more like a disc of light.

W00t:


One concern: navigation. "All I ask is a tall ship and a star to steer her by," John Masefield from the poem "Sea Fever." Definitely not a job for Mr. Sulu, nor battles "pivoting at Warp 2." It would take some sophisticated computing, predicting where stars are before your acceleration (so you wouldn't slam into anything - that ruins any trip).

If we were ever to do it: the thrill would be in getting to the end of the trip, to clearly view the stars from another sky, and eventually the soil of another earth.

CNET: Near-lightspeed space travel: Not as cool-looking as you think

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DNA Origami...


TECHNOLOGY REVIEW: One of the most promising ways to capture, generate and manipulate photons is with tiny diamonds. The secret is to create nanodiamonds with a defect in their structure where a nitrogen atom has taken the place of a carbon.




Quantum physicists are particularly interested in these so-called nitrogen vacancies because they can capture, store and emit the quantum information that photons carry. What’s more, they do all this at room temperature. It is even possible to manipulate this information using magnetic and electric fields.

 

In short, nitrogen vacancies are important building blocks for for quantum computers.

 

But there’s a problem. It’s not hard to make individual nanodiamonds but it is extremely difficult to arrange them next to each other so that the quantum information they store can be processed.

 

Their idea is to bind nanodiamonds together with the required nanometre precision using biological molecules such as DNA and protein. What’s more, they say they’ve demonstrated the technique for the first time.

 

Physics arXiv: Self-assembling hybrid diamond-biological quantum devices

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Really, Really BIG...

The coloured background indicates the peaks and troughs in the occurrence of quasars at the distance of the LQC. Darker colours indicate more quasars, lighter colours indicate fewer quasars.

An international team of astronomers, led by academics from the University of Central Lancashire (UCLan), has found the largest known structure in the universe. The large quasar group (LQG) is so large that it would take a vehicle travelling at the speed of light some 4 billion years to cross it. The team publish their results in the journal Monthly Notices of the Royal Astronomical Society.



Quasars are the nuclei of galaxies from the early days of the universe that undergo brief periods of extremely high brightness that make them visible across huge distances. These periods are 'brief' in astrophysics terms but actually last 10-100 million years.



Since 1982 it has been known that quasars tend to group together in clumps or 'structures' of surprisingly large sizes, forming large quasar groups or LQGs.



The team, led by Dr Roger Clowes from UCLan's Jeremiah Horrocks Institute, has identified the LQG which is so significant in size it also challenges the Cosmological Principle: the assumption that the universe, when viewed at a sufficiently large scale, looks the same no matter where you are observing it from.



The modern theory of cosmology is based on the work of Albert Einstein, and depends on the assumption of the Cosmological Principle. The Principle is assumed but has never been demonstrated observationally 'beyond reasonable doubt'.

Royal Astronomical Society: Astronomers discover the largest structure in the universe

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Social Entropy...


1. A measure of the unavailable energy in a closed thermodynamic system that is also usually considered to be a measure of the system's disorder, that is a property of the system's state, and that varies directly with any reversible change in heat in the system and inversely with the temperature of the system; broadly : the degree of disorder or uncertainty in a system

2. a : the degradation of the matter and energy in the universe to an ultimate state of inert uniformity; b : a process of degradation or running down or a trend to disorder



3. chaos, disorganization, randomness, see Meridian-Webster

Further examples of entropy: aging, obesity; methods to counter: vitamins, exercise, diet.

No measure, despite how noble the intentions, will 100% protect us from our fellow humans, and comparisons to dangers from knives, cars and baseball bats obfuscates the issue at hand: the warping of the constitution to justify building personal arsenals (with no apparent responsibility to secure them), and the wealth of weapons manufacturers. Mr. LaPierre is a lobbyist, and like so many "chicken hawk patriots" conveniently missed his generations' opportunity to be a "good guy with a gun" and represent his country in Vietnam.


In Chicago, in New Orleans, in East Winston-Salem, East/South Side ____________, random acts of violence are seen by the same media as a personal failing in "that area of town" versus a structural failing. That structure is society as a whole and a failure to apply not the Second Amendment, but the Second Law of Thermodynamics - Entropy - to systems decaying due to the market-driven and void meaning now of "education," avarice, career politicians pimping constituencies with the flimsiest fidelity to principles or promises, propped up by corrupt money interests whose only ambition is not "the common good," but to maximize profits, avoiding taxes and bequeathing large truckloads of treasure to their heirs.

In physics, entropy is why there can be no such thing in nature as 100% efficiency or perpetual motion machines. Thus, no one political party, culture/race has, or should have a complete lock on the Oval Office and the Presidential Mansion (as it was once called).


We are given sound bites and sloganeering: speeches on "shining cities on a hill," whereas we have the stench of a dung heap ripe with methane for the lighting. Lit by ignorance, goaded by pundits with zero education, zero sophistication, zero appreciation for nuance that some of our fellow mortals cannot digest; that some of their worst pronouncements might as well be from clouds and smoke on Mount Sinai.

And by some stretch of sanity, what would be gained if such inane, insane actors were actually successful in what could nakedly be called revolution and armed insurrection? The Pyrrhic ashes of anarchic victories are a poor foundation to rebuild a republic from.


As I watch the news, I'm not sure if this is an enactment of Animal Farm, or a slow train wreck. Some common sense suggestions:

"Common sense is not so common." Voltaire

Visit NBCNews.com for breaking news, world news, and news about the economy
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Deus Ex Machina...


In recent years, machines have grown increasingly capable of listening, communicating, and learning—transforming the way they collaborate with us, and significantly impacting our economy, health, and daily routines. Who, or what, are these thinking machines? As we teach them to become more sophisticated, how will they complement our lives? What will separate their ways of thinking from ours? And what happens when these machines understand data, concepts, and behaviors too big or impenetrable for humans to grasp? We were joined by IBM’s WATSON, the computer Jeopardy! champion, along with leading roboticists and computer scientists, to explore the thinking machines of today and the possibilities to come in the not-too-distant future.
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Beautiful Minds...


Immanuel Kant, who coined the term genius in the 1700s, defined it as the rare capacity to independently understand concepts that would normally have to be taught by another person. Since then, the spectrum of abilities that we call genius has widened, but pivotal questions remain: What exactly is genius? Where do the remarkable abilities of genius come from?

 

Site: World Science Festival

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The One That Got Away...

Grateful to my friend from Austin, Texas Deone Wilhite for this posting...

Dr. Neil deGrasse Tyson, age 9 (see link below)

At age nine, after a trip to the Hayden Planetarium—the same planetarium he would direct 25 years later—Tyson decided on a career in astrophysics. “I felt called by the universe to do this,” he says, “and that has never changed.”

In junior high, Tyson took to using his telescope on the roof of his apartment building. At the sight of a teenager fumbling with a mysterious object in the night, neighbors often thought they saw a thief and called the police, whom he would placate by offering a look through the lens.

In high school, Tyson won summer scholarships to study astrophysics in Africa, Utah, and Scotland. He rubbed elbows with astronaut Neil Armstrong and biochemist and sci-fi writer Isaac Asmiov. At 15 he was invited to give his first lecture, to an extension class at the City University of New York.

“It was as natural as breathing,” Tyson recalls. “I was just talking about what I knew, the way other boys talked about baseball cards.”

Frank Bash, professor emeritus of astronomy and former director of UT’s McDonald Observatory, supervised Tyson as a teaching assistant for Intro to Astronomy. “Neil had a natural gift for teaching,” Bash says. “After he taught, the students would beg for him back. He did crazy stuff—moonwalking in class.”

Doing the moonwalk for his students wasn’t a gag, Tyson says—it was a strategy. “If you’re only using words to communicate as a teacher, why show up?” he says. “Why not just type your notes? Teaching is a full-body performance. The moonwalk was all the rage in 1983, and the students loved it. It made the material work for them.”

Back in the lab, though, things weren’t going as well. Tyson wasn’t making progress on his dissertation, and professors encouraged him to consider alternate careers. He took the criticism hard, and he also faced racial discrimination on campus.

“I was stopped and questioned seven times by University police on my way into the physics building,” he says. “Seven times. Zero times was I stopped going into the gym—and I went to the gym a lot. That says all you need to know about how welcome I felt at Texas.”

"That which does not kill us makes us stronger."

Friedrich Nietzsche

Alcalde - Texas Exes: Star Power
#P4TC: Diaspora 10 February 2012

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Vela Pulsar...


NASA: The star of this movie is the Vela pulsar, a neutron star that was formed when a massive star collapsed. The Vela pulsar is about 1,000 light years from Earth, spansis about 12 miles in diameter, and makes over 11 complete rotations every second, faster than a helicopter rotor. As the pulsar whips around, it spews out a jet of charged particles that race out along the pulsar’s rotation axis at about 70% of the speed of light. In this still image from the movie, the location of the pulsar and the 0.7-light-year-long jet are labeled. 





The Chandra data shown in the movie, containing eight images obtained between June and September 2010, suggest that the pulsar may be slowly wobbling, or precessing, as it spins. The shape and the motion of the Vela jet look strikingly like a rotating helix, a shape that is naturally explained by precession, as shown in this animation [link to mathematica animation from Oleg K]. If the evidence for precession of the Vela pulsar is confirmed, it would be the first time that a jet from a neutron star has been found to be wobbling, or precessing, in this way.

NASA: Chandra page

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MuCap OMC...

MAPLE: Underwater Cosmic-Ray Muon Radiography

The rate at which protons capture muons has been accurately measured for the first time by the MuCap collaboration at the Paul Scherrer Institute (PSI) in Switzerland. This process, which can be thought of as beta decay in reverse, results in the formation of a neutron and a neutrino. The team has also determined a dimensionless factor that influences the rate of muon capture, which was found to be in excellent agreement with theoretical predictions that are based on very complex calculations.





Muons are cousins of the electron that are around 200 times heavier. Beta decays demonstrate the weak nuclear force in which a neutron gets converted into a proton by emitting an electron and a neutrino. Now, replace the electron with the heavier muon and run the process backwards: a proton captures a muon and transforms into a neutron while emitting a neutrino. This process – known as ordinary muon capture (OMC) – is crucial to understanding the weak interaction involving protons.

Physics World: Muon-capture measurement backs QCD prediction

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Below Zero...

Hot minus temperatures: At a negative absolute temperature the energy distribution of particles inverts in comparison to a positive temperature.

What is normal to most people in winter has so far been impossible in physics: a minus temperature. On the Celsius scale minus temperatures are only surprising in summer. On the absolute temperature scale, which is used by physicists and is also called the Kelvin scale, it is not possible to go below zero—at least not in the sense of getting colder than zero kelvin. According to the physical meaning of temperature, the temperature of a gas is determined by the chaotic movement of its particles—the colder the gas, the slower the particles. At zero kelvin (-273 C) the particles stop moving and all disorder disappears. Thus, nothing can be colder than absolute zero on the Kelvin scale.




Physicists at the Ludwig-Maximilians University Munich and the Max Planck Institute of Quantum Optics in Garching have now created an atomic gas in the laboratory that nonetheless has negative Kelvin values. These negative absolute temperatures have several apparently absurd consequences: Although the atoms in the gas attract each other and give rise to a negative pressure, the gas does not collapse—a behavior that is also postulated for dark energy in cosmology. Supposedly impossible heat engines such as a combustion engine with a thermodynamic efficiency of over 100% can also be realized with the help of negative absolute temperatures.

 

R and D mag: A temperature below absolute zero

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Flexible Graphene...

Credit: Article schematic

A team led by Silvija Gradecak [MIT] has succeeded in growing ZnO nanowire arrays on graphene by modifying the surface of the carbon material with conducting polymer interlayers. The researchers synthesized ZnO seed layers on the interfacial polymer layers, which results in well ordered ZnO nanowire growth via a low-temperature hydrothermal process. "The polymer coating process, the ZnO seed layer deposition and hydrothermal ZnO nanowire growth are all possible in solution and under ambient conditions," explained Gradecak. "What is more, the interfacial conductive polymer coating allows for efficient charge transfer between the ZnO nanowires and graphene, so preserving the latter's unique electronic properties."

 

Nanotech web: Graphene optoelectronics goes flexible

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Perhaps Now...

Global Poverty Project dot com

TECHNOLOGY REVIEW: Amid the crises and battles, both predictable and unforeseeable, that you will face over the next four years, one problem will stand out both for the economic and social dangers it poses and for the difficulty and cost of solving it. Whether you can develop a practical and sustainable strategy to address climate change—specifically, to begin lowering carbon dioxide emissions—will define the success of your new term as president. We do not make such a declaration lightly; we are keenly aware of the many other challenges you face. But the potential for global warming over the next decades threatens consequences so dire that they could overwhelm any progress you make toward other long-term economic, social, and political goals.

 

Altering the course of climate change is a task that will take decades. It will require innovative new technologies and overhauls of the world’s energy, agricultural, and transportation infrastructure. We don’t suggest that you can reverse the warming trend over the next four years, or even that you will be able to significantly decrease carbon dioxide emissions. But with the help of the world’s best economic, technical, and scientific minds, you can formulate a policy that will show the nation—and the world—how we can begin to make the changes necessary to ensure that the concentration of carbon dioxide in the atmosphere stabilizes at a safe level. Indeed, it is critical that you do so.

 

Telegraph

 

MIT Technology Review: Dear Mr. President: Time to Deal with Climate Change

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Of Mice and Men...

...sadly, the effects of cosmic rays are not superpowers and spandex tights:

Comic Book Movie dot com


For the future of manned spaceflight, we have yet another problem to solve...


Senior author of the study, Professor Kerry O'Banion from the University of Rochester Medical Centre (URMC) Department of Neurobiology and Anatomy said: 'Galactic cosmic radiation poses a significant threat to future astronauts.

'The possibility that radiation exposure in space may give rise to health problems such as cancer has long been recognised.



'However, this study shows for the first time that exposure to radiation levels equivalent to a mission to Mars could produce cognitive problems and speed up changes in the brain that are associated with Alzheimer's disease.'



Tests on mice with models of Alzheimer's showed that after they were exposed to various doses of radiation, including levels comparable to what astronauts would be experience during a mission to Mars, they were far more likely to fail these tasks - suggesting neurological impairment - earlier than these symptoms would typically appear.


The brains of the mice also showed signs of vascular alterations and a greater than normal accumulation the protein 'plaque' that accumulates in the brain and is one of the hallmarks of the disease.



'These findings clearly suggest that exposure to radiation in space has the potential to accelerate the development of Alzheimer's disease,' said Professor O'Banion.

 

Daily Mail:
Space travel under threat as scientists find cosmic radiation could cause Alzheimer's in astronauts

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Nerd Watch 2013...

 

  • Regina Dugan, former director of DARPA, now at Google overseeing advanced product and research for Motorola
  • Babak Parviz, nanotechology, founder of Google Glasses
  • Andreas Raptopoulos, Matternet
  • Gina Bianchini, Mitghybell, co-founder of Ning
  • Eddy Cue, Software and Internet services, Apple: responsible for iTunes and the App Store

The nerd...pays!



"You should be nice to nerds. In fact I'd go so far as to say if you don't already have a nerd in your life you should get one." Regina Dugan at TED


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The Danger of Created Realities...


Reality-based community is an informal term in the United States. In the fall of 2004, the phrase "proud member of the reality-based community" was first used to suggest the commentator's opinions are based more on observation than on faith, assumption, or ideology. The term has been defined as people who "believe that solutions emerge from judicious study of discernible reality." Some commentators have gone as far as to suggest that there is an overarching conflict in society between the reality-based community and the "faith-based community" as a whole. It can be seen as an example of political framing.


The source of the term is a quotation in an October 17, 2004, The New York Times Magazine article by writer Ron Suskind, quoting an unnamed aide to George W. Bush (later attributed to Karl Rove[1]):

The aide said that guys like me were "in what we call the reality-based community," which he defined as people who "believe that solutions emerge from your judicious study of discernible reality." ... "That's not the way the world really works anymore," he continued. "We're an empire now, and when we act, we create our own reality. And while you're studying that reality—judiciously, as you will—we'll act again, creating other new realities, which you can study too, and that's how things will sort out. We're history's actors…and you, all of you, will be left to just study what we do."[2] See Wikipedia

M. Schatzman, an American psychiatrist, has conducted extensive psychological experiments with a subject named Ruth. Ruth is perfectly sane but is apparently able to create vivid hallucinations at will. Neither the experimenters nor photographic film detect these apparitions, but they are very real to Ruth. See Scientific Frontiers, 1981

I have mentioned Neil Postman in the following posts (pun intended), here, here and here. "Amusing Ourselves to Death" is almost prophetic oxymoron (see links).

We have simplified reality: point-and-click downloads, "Google it" post Dewey Decimal System; so-called "reality TV" requiring the slimmest bit of conceptualization, hollow actors with no chop or skill,  no paid writers or imagination. We've made testing a pseudo-science of near telepathic proportions, training our youth not in exploration and curiosity  but prognostication (a, b, c, d or e: all of the above), despite the reality that Finland has "kicked our collective assets" educationally by NOT following this draconian model pushed by for-profit testing services, resulting in "reverse Robin Hood" of poor school districts that desperately need the help.

I sincerely wish I could ignore ignoramuses, yet they manage to get themselves elected to public office, serve on science committees and through the process of redistricting, leave themselves nearly impenetrable to replacement until 2022. Through the process of magical thinking, they convince themselves election results can be ignored, and their ideas and ideals are popular, and worth pursuing.

Thomas Jefferson, lawyer, scientist (and sadly, slave owner) based our form of government on Sir Isaac Newton (founder of Physics); Sir Francis Bacon (Inductive Reasoning) and Sir John Locke (Empiricism). He called them his "trinity of three greatest men."
Newton, Bacon, Locke from Biography.com

The danger of created realities is we begin to "believe our own press," and make things that are immutable pliable, and things pliable immutable. Thus, we now have an incumbency that does not have to "listen to reason," or science.
Rational actors like Bruce Bartlett and David Frum are largely silenced; and one party holds itself not to the Constitution, but to Grover Norquist and other pledges.

There are no Venn diagrams of intersecting ideas: only "us" versus "them," and "we the people" never win.

The danger of created realities is the empirical evidence of experience contradicting [for some] belief systems (and, that threat is made up as well as faith can be informed by science), the complete misunderstanding and misrepresentation of the words "theory" and "hypothesis"; that our thoughts are most certainly NOT things, that such pop/poop culture warping the understanding of quantum mechanics cum metaphysics is dangerous, and does not create a single job in this or any other nation.

"We hold these truths to be self-evident" (Abraham Lincoln). For some who rail against science and the Theory of Relativity, truth is pretty relative now. Without trial, jury or standard, anything can be claimed and posted to the Internet: "hits" don't mean facts.

This blog is open to critique: you can list it, and I'll post it (anonymous, misspelled or otherwise). I really don't have to agree with you, but I do sensor abusive insults and advertisements. That is how we all learn: that is what a rational, thinking species does.

The Lincoln-Douglas debates were much longer and far more detailed than our current 90-minute infomercial reality shows by comparison. Sorry for the rant, but this massive, national "dumb down" cannot continue and we resemble a democratic republic for very much longer.


For advances in science, for a functional democratic republic, we need both parties grounded firmly in reality.
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Russian Reboot...

Credit: Astroprof's Page

MOSCOW, Dec 27 (Reuters) - The country that oversaw the launch of the world's first artificial satellite hopes to regain some of its former glory with a big boost in space spending announced by Russia on Thursday after a series of failures.


Prime Minister Dmitry Medvedev approved a plan to spend 2.1 trillion roubles ($68.71 billion) on developing Russia's space industry from 2013 to 2020, state-run RIA news agency reported.

"The programme will enable our country to effectively participate in forward-looking projects, such as the International Space Station (ISS), the study of the Moon, Mars and other celestial bodies in the solar system," Medvedev was quoted as saying.

Despite the launch by the former Soviet Union of Sputnik 1 in 1957, triggering the Cold War space race, Russia's space programme has suffered a series of humiliating setbacks in the past year.

These have mostly involved unmanned missions such as satellite launches, that industry veterans blame on a decade of crimped budgets and a brain drain.

Reuters: After setbacks, Russia boosts space spending

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Lightness of Being...


German material scientists from Kiel University and the Hamburg University of Technology have created the world’s lightest material, dubbed aerographite.

One cubic centimeter of aerographite weighs just 0.2 milligrams, which is four times lighter than the previous record holder, 5,000 times less dense than water, and six times lighter than air. Aerographite is so light that it is difficult to work with it in a normal lab. Any small movement in the lab can create winds that blow the material around.

Euro News Sci-Tech: Lighter-than-air material discovered

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Sesquicentennial...



A tradition began Dec. 31, 1862, as many black churches held Watch Night services, awaiting word that Lincoln's Emancipation Proclamation would take effect amid a bloody Civil War. Later, congregations listened as the president's historic words were read aloud.

Last night (other than fiscal cliff theatrics) was the 150th anniversary, or sesquicentennial, of that tradition; today the same for the Emancipation Proclamation.

It formed the world George Washington Carver would enter a year later: From 1915 to 1923, Carver concentrated on researching and experimenting with new uses for peanuts, sweet potatoes, soybeans, pecans, and other crops, as well as having his assistants research and compile existing uses. This work, and especially his speaking to a national conference of the Peanut Growers Association in 1920 and in testimony before Congress in 1921 to support passage of a tariff on imported peanuts, brought him wide publicity and increasing renown. In these years, he became one of the most well-known African Americans of his time. (Wikipedia)

It enabled Edward Alexander Bouchet to enter Yale in 1870, complete his dissertation in geometrical optics in 1876 becoming the first African American to earn a PhD in physics and the sixth American at that time to do so (see link at Edward's name).

There are many more that I could name, many names of note since. They exist because of an innate curiosity of the world around them, and an opportunity courageously presented; a freedom of simply being counted as part of humanity extended: to learn about it.

It was, and is, a world worth creating.

Hmm: ...my 1,013th posting for this blog, on 01/01/2013. Interesting.

National Society of Black Physicists:
NSBP Member Stephon Alexander Wins 2013 Edward Bouchet Award
NSBP Member Hakeem Oluseyi selected to be a TED Global 2012 Fellow

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Emancipation Proclamation anniversary: Watch Night ceremony held at National Archives
National Archives: The Emancipation Proclamation

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Once More...


I took a break yesterday, having an off-line life with family and friends here, here, here and here. Hence, I was too exhausted to blog.

I liked Tom Hiddleston in "Thor" and "The Avengers." Along with Henry V, these are works of fantasy. I'm sure this is how our leaders see themselves...

 

David H. Freedman wrote in Scientific American:

 

Financial-risk models got us in trouble before the 2008 crash, and they're almost sure to get us in trouble again

When it comes to assigning blame for the current economic doldrums, the quants who build the complicated mathematic financial risk models, and the traders who rely on them, deserve their share of the blame. [See “A Formula For Economic Calamity” in the November 2011 issue]. But what if there were a way to come up with simpler models that perfectly reflected reality? And what if we had perfect financial data to plug into them?

Incredibly, even under those utterly unrealizable conditions, we'd still get bad predictions from models.

The reason is that current methods used to “calibrate” models often render them inaccurate.

Model - Science Definition: A systematic description of an object or phenomenon that shares important characteristics with the object or phenomenon. Scientific models can be material, visual, mathematical, or computational and are often used in the construction of scientific theories. See also hypothesis, theory.

 

Models are a starting point, then they must bow to the unrelenting outcomes and consequences...of reality.

 

The educator in me challenges our congress to a simple test: the exit TAKS on social studies. Curious with your displayed acumen on governance what your scores would be.

 

Scientific American: Why Economic Models Are Always Wrong
Money Morning: Fiscal Cliff 2013

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