Reginald L. Goodwin's Posts (3117)

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Nada Mucho...

Image Source: See Link [2] below

Some levity in light of current events that I will address in an essay on Sunday. RG

The number zero as we know it arrived in the West circa 1200, most famously delivered by Italian mathematician Fibonacci (aka Leonardo of Pisa), who brought it, along with the rest of the Arabic numerals, back from his travels to north Africa. But the history of zero, both as a concept and a number, stretches far deeper into history—so deep, in fact, that its provenance is difficult to nail down.


"There are at least two discoveries, or inventions, of zero," says Charles Seife, author of Zero: The Biography of a Dangerous Idea (Viking, 2000). "The one that we got the zero from came from the Fertile Crescent." It first came to be between 400 and 300 B.C. in Babylon, Seife says, before developing in India, wending its way through northern Africa and, in Fibonacci's hands, crossing into Europe via Italy. [1]

To mathematician Amir Aczel the most important number of all might just be zero. Zero—nothing—may sound boring, but without it our entire number system and the world of mathematics it enables could not exist. In his new book, Finding Zero: A Mathematician’s Odyssey to Uncover the Origins of Numbers (St. Martin’s Press, Palgrave Macmillan Trade, 2015), Aczel searches for, and finds, the earliest known artifact bearing a representation of zero.

The object, an inscription on a stone slab, was originally found in the 1930s in the ruins of a seventh-century temple in Cambodia. It was lost over the years and scholars feared it was destroyed during the 1970s reign of the Khmer Rouge. But Aczel finally tracked it down and reintroduced this important milestone into the historical record. [2]

Zero as concept can be credited to Ancient Babylon (nowadays Iraq), India and appeared in the New World with the Mayans [2]. This got us thinking about "big" numbers, changing our concept of things large, such as architecture, the cosmos and wealth; and things long, like time.

It's also a good excuse to embed a true "infomercial" from my youth, when kids had cartoons and an education in the advertisements:

Scientific American:

1. The Origin of Zero, Much ado about nothing: First a placeholder and then a full-fledged number, zero had many inventors, John Matson
2. This Mathematician Figured Out How to Solve for Zero [Q&A], Amir Aczel explored jungles and ancient temples to trace the history of the number zero, Clara Moskowitz

#P4TC Related Link

Zilch...Nada...and a little more..., November 28, 2011

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HDI...

Figure 1. Human-Data Interaction. Our personal data feeds black-box analytics algorithms. These output inferences driving actions whose effects may or may not be visible to us, and which may include changes in our behaviour and the data generated about and by us subsequently.

TECHNOLOGY REVIEW: The rapidly evolving ecosystems associated with personal data is creating an entirely new field of scientific study, say computer scientists. And this requires a much more powerful ethics-based infrastructure.

Back in 2013, the UK supermarket giant, Tesco, announced that it was installing face recognition software in 450 of its stores that would identify customers as male or female, guess their age and measure how long they looked at an ad displayed on a screen below the camera. Tesco would then give the data to advertisers to show them how well their advertising worked and allow them to target their ads more carefully.

Many commentators pointed out the similarity between this system and the sci-fi film Minority Report in which people are bombarded by personalised ads which detect who they are and where they are looking.

It also raised important questions about data collection and privacy. How would customers understand the potential uses of this kind of data, how would they agree to these uses and how could they control the data after it was collected?


Abstract

The increasing generation and collection of personal data has created a complex ecosystem, often collaborative but sometimes combative, around companies and individuals engaging in the use of these data. We propose that the interactions between these agents warrants a new topic of study: Human-Data Interaction (HDI). In this paper we discuss how HDI sits at the intersection of various disciplines, including computer science, statistics, sociology, psychology and behavioural economics. We expose the challenges that HDI raises, organised into three core themes of legibility, agency and negotiability, and we present the HDI agenda to open up a dialogue amongst interested parties in the personal and big data ecosystems.



Physics arXiv: Human-Data Interaction: The Human Face of the Data-Driven Society
Richard Mortier, Hamed Haddadi, Tristan Henderson, Derek McAuley, Jon Crowcroft

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Einstein's Impossible Measurement...


Figure 1. Brownian motion trajectories. When examined at modest measurement rates (a), the observed positions (red dots) of particles executing Brownian motion appear to lie on the jerky trajectory illustrated in red. The black curve shows the underlying particle path. (b) Measurements at finer time scales reveal that the particle path is in fact built from short bursts of constant velocity motion.

Citation: Phys. Today 68, 1, 56 (2015); http://dx.doi.org/10.1063/PT.3.2665



It's always exciting when I recognize and actually know the authors!

Dr. Mark G. Raizen is the Sid W. Richardson Foundation Regents Chair of Physics and Professor of Physics at the University of Texas, Austin.

Dr. Tongcang Li received his PhD under Mark's guidance and is now Assistant Professor of Physics and Astronomy/Assistant Professor of Electrical and Computer Engineering at Purdue University. They were both kind enough when Dr. Li was completing his graduate degree to give Cassandra and I a tour of their lab and impressive work at UT.

Mark has pioneered, in his own words, a "general methods to control the motion of atoms and molecules. This work will be used to test very basic questions in physics, and will also find real-life applications," which is a modest understatement! First to do this was former Department of Energy Secretary and Nobel Laureate Dr. Steven Chu. The process in the Raizen Group is a vast improvement on this impressive achievement. An excerpt of the article is below; explore the article at the link for "optical tweezers": think James Clerk Maxwell's "demon" thought experiment. Keep in mind real-life applications going forward. Nicely done, gentlemen: I applaud your great research and a well-written presentation. I thank you for your permission to post this.



Particles undergoing Brownian motion move with constant velocity between Brownian kicks. Albert Einstein predicted the velocity distribution, but he wrongly thought his result would never be experimentally confirmed.



Brownian motion, the seemingly random wiggle-waggle of particles suspended in a liquid or gas, was first systematically studied by Robert Brown in 1827 and described in the Philosophical Magazine the next year (volume 4, page 161). When Brown used a microscope to look at particles from pollen grains immersed in water, he “observed many of them very evidently in motion.” It looked like the particles were alive, so vigorously did they move.



The phenomenon of Brownian motion was first explained by Albert Einstein in 1905 as a consequence of the thermal motion of surrounding fluid molecules. Einstein’s theory predicts that Brownian particles diffuse; as a consequence, their mean-square displacement 〈(Δ x)2〉 = 2 Dt in each dimension is proportional to a diffusion coefficient D and the measured time interval t. As illustrated in figure 1 a, the motion of Brownian particles looks like a jerky and unpredictable dance, and the sudden changes in direction and speed seem to indicate that velocity is not defined. Moreover, the mean velocity
〈 v〉 ≡ 〈(Δ x)21/2/ t = (2 D/ t) 1/2 diverges as t approaches 0. If you think all that is strange, you are in good company: Einstein felt the same way.



Physics Today: The measurement Einstein deemed impossible
Mark G. Raizen and Tongcang Li

Related #P4TC Links:

Improved Isotope Enrichment, July 1, 2014
Einstein, Entropy and Information, March 23, 2013
Brownian Motion...Einstein "wrong..ish", May 16, 2011
Maxwell's Demon & information-to-energy, November 16, 2010
Comprehensive Control of Atomic and Molecular Motion, August 23, 2010

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International Year of Light...

The International Year of Lightand Light-based Technologies will see hundreds of events around the world celebrating the science and applications of light.

Physicists around the world are gearing up for the International Year of Light and Light-based Technologies (IYL), which kicks off later this month at an official opening ceremony at the headquarters of the United Nations Educational, Scientific and Cultural Organization (UNESCO) in Paris. Some 1500 delegates are set to converge on the French capital for the event, which runs from 19 to 20 January, and will include representatives from the UN and UNESCO as well as the Nobel laureates Zhores Alferov, Steven Chu, Serge Haroche and William Phillips. Designed to highlight how light and light-based technologies touch every aspect of our lives, the IYL will involve more than 100 partners from 85 countries – including the Institute of Physics (IOP), which publishes Physics World.

The UN has declared "international years" since 1959 to draw attention to topics deemed to be of worldwide importance. In recent years, there have been a number of successful science-based themes, including physics (2005), astronomy (2009), chemistry (2011) and crystallography (2014), with the idea for a celebration of light having been initiated by the European Physical Society (EPS) in 2009.

It is light and its careful, focused exposure to finer details that has allowed us to shrink feature sizes and thus technologies in line with Moore's Law. Beyond light, we're looking at nanomanufacturing techniques using e-beam (electrons); nanoimprinting, nanoscratching and using AFM (atomic force microscope) and STM (scanning tunneling microscopy) for finer control still (ref: Physics Today, "Top-down Nanomanufacturing," Matthias Imboden and David Bishop, page 47). This post accompanies Monday's "Fab on a Chip" post. What we do in this industry is not trivial, but it is learn-able, doable and quite rewarding with the right dedication and discipline.

Physics World: Physicists get set for UNESCO's Year of Light

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Fab on a Chip...

Source: Link Below

(Nanowerk Spotlight) The difficulties associated with precisely manipulating nanomaterials to turn nanoscale structures into reliable functional devices – at a reasonable cost – is one of the key challenges that needs to be overcome in mass-manufacturing nanodevices (other than computer chips, which require massive amounts of capital investment).

One of the most restricting parameters in nanofabrication is the difficulty involved with controllably patterning materials at precise locations in a repeatable manner over relatively large areas. The traditional process of randomly placing nanomaterials on a substrate typically leads to highly variable performance of the resultant functionalized devices.

Conventional lithography methods that are used in computer chip manufacturing are not only very expensive and wasteful, they also are reaching physical limitations. To overcome these issues, researchers have been developing a range of alternative, resist-free nanopatterning techniques, among them dip pen nanolithography, oxidation nanolithography, or colloidal self-assembly (see: "3D nanolithography without the expensive hardware").

A novel microelectromechanical system (MEMS)-based mask writer has now been developed by a team of researchers at Boston University. The device allows to directly write structures at the nanoscale without the need to use photoresist, lift-off techniques or other complex and expensive approaches. The technique uses a MEMS plate with apertures drilled into it and a shutter so that one can, in effect, spray paint with atoms. With the shutter, the process can be turned on and off.

Nanowerk.com:
Atomic calligraphy - using MEMS to write nanoscale structures
NIST: Building a Fab on a Chip, David Bishop

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Equally Terrifying...

A humorous meme I've seen repeated as the apt photo response to ridiculous statements.

“Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.”

― Arthur C. Clarke



Opening existential essay remark: I am not supporting visitation by "Grey's" nor denigrating anyone's experiences. I simply have no reference to render or posit any statement on it.



The quote by Arthur C. Clarke opened the science fiction movie "Dark Skies," with [spoiler alert] scary music, suicidal birds, bleeding noses, vaudevillian sleep walker trances and baffling plot devices throughout. My usual rejoinder is, what resources does our Earth possess that they can't find elsewhere?



However, the quote intrigued me and placed me in a deep contemplative state on the subject, savoring either possibility in my mind. I began to sketch...



Punnett Square

SETI?Search forAbandon search
NoWaste $
Futile
No vision
Save $
Infrastructure
Address Climate Change
YesInvest $
Increase knowledge
Overlook Effect
Ended investment $ prematurely
Others' (aliens) mistakes missed
Unprepared for the unknown


..."we are alone in the universe"...the first row of the Punnett Square.

13.8 billion years has allowed the observable universe to expand to 28 billion light years in diameter according to recent estimates, and that's what is "observable." It's likely larger than we can possibly imagine.

If we're alone in such a vast incomprehensible real estate, there are likely planets the human species could expand to and colonize. As observed by an old book "Migration to the stars: Never again enough people" by Edward S. Gilfillan, the aliens we encounter may very well be our own descendants.

What would such descendants be and act like? Would they any more than us address our crumbling infrastructure, or climate change? The exploitation of resources has made wars and rumors of wars; men millionaires and robber barons; billionaires and oligarchs. How would the resources of an asteroid of almost pure platinum or diamond make the first trillionaire respond to his fellow humans? We currently have exclusive enclaves that require entry codes and appointments: Elysium was just a movie, wasn't it? Without an appreciable societal seismic and psychological shift in our values, we're likely birthing the next generation of selfish and self-absorbed (delicately put) rectum holes...who usually don't share even virtuously limitless resources well. Inequality is the mother of criminal enterprises, freedom fighters and terrorism. Hyper inequality may yet see an invasion by Martians, fed up with making their self-absorbed anal rulers richer still.

If we are truly existentially "it," and as Carl Sagan said, "we are the way for the cosmos to know itself," it will have a profound identity crisis at our possible self-destructed demise and the utter silence of Entropy.

..."or we are not"...the bottom row.

There is a bit of accepted naivete from Star Trek. In light of current histrionics displayed by celebrities, pundits and our so-called leaders, would world peace or worldwide panic break out with the advent of Vulcans? Zefram Cochran - the mythical scientist that creates superluminal travel - is met by benevolent alien representatives of the Vulcan Science Academy. That is both quaint and Deus ex machina convenient. It could easily have been the Klingons, and a different story line. Before we encounter aliens, I'd say we need to drink deep of the "Overlook Effect" and see ourselves in another light than we currently do as warring tribes threatening Armageddon, instead of as a whole species.

"Mistakes are not the best teacher: OTHER peoples' mistakes are." I'm sure I've heard it somewhere else in another form. I like quoting it to people, like my sons, that matter. We could learn a lot out there from a failed civilization. What caused their demise? Was it climate change? Ethnic strife? Nuclear war, or all of the above? How would we see ourselves once we knew that? What decisions would we make differently, or not? The most recent dominant species were the dinosaurs. They were essentially eating vegetation if herbivore; other dinosaurs if carnivore and making baby dinosaurs until an extraterrestrial visitor impacted their lives in the form of the Chicxulub Asteroid in Mexico. We - unlike Dino - have learned to track them for our own continuance as s/he didn't have satellite technology.

This kind of goes back to my first commentary on "Dark Skies": when someone asked what I'd say if I encountered a "Grey," the only question that came to mind: "what do you want?" The how is obviously some propulsion system we haven't invented yet. The question is why? Again, what resource does our planet of diminishing food, fossil fuels, air and water possess they couldn't encounter in 8,588,957,055 parsecs? Surely we're not that special! "Skies" fielded a lot of UFO conspiracy theories and at least one plausible corollary of the Fermi paradox (a play on the "Zoo Hypothesis"): to fairy-like, god-like, imp-like aliens, we're essentially lab rats. Conveniently explaining their alleged baffling behavior, as biologists never ask rodents how their families are, or how said vermin feel before the experiment begins. Then, there's this classic:

That sense of powerlessness in either state, I find equally terrifying, be it boot-to-neck authoritarian-rule to societal oblivion; experimentation or menu entry.
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Body Cameras...

Photo source: article link below

Looks like science could keep everyone involved honest and safe. The constant pressure to reach ticketing/arrest quotas should be addressed and lessened as well, so our "public servants" can do just that.

Researchers from the University of Cambridge’s Institute of Criminology (IoC) have now published the first full scientific study of the landmark crime experiment they conducted on policing with body-worn-cameras in Rialto, California in 2012 — the results of which have been cited by police departments around the world as justification for rolling out this technology.


The experiment showed that evidence capture is just one output of body-worn video, and the technology is perhaps most effective at actually preventing escalation during police-public interactions: whether that’s abusive behaviour towards police or unnecessary use-of-force by police.

The researchers say the knowledge that events are being recorded creates “self-awareness” in all participants during police interactions. This is the critical component that turns body-worn video into a ‘preventative treatment’: causing individuals to modify their behaviour in response to an awareness of ‘third-party’ surveillance by cameras acting as a proxy for legal courts — as well as courts of public opinion — should unacceptable behaviour take place.

My Science Academy:
FIRST SCIENTIFIC REPORT SHOWS POLICE BODY-CAMERAS CAN PREVENT UNACCEPTABLE USE-OF-FORCE

Related Link:
NIST Announces Initial Members of Forensic Science Digital Evidence Subcommittee

Tomorrow: Equally Terrifying

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Quantum Secured Credit Cards...



A team of researchers from the Netherlands has harnessed the power of quantum mechanics to create a fraud-proof method for authenticating a physical 'key' that is virtually impossible to thwart. Credit: The Optical Society (OSA) and MESA+ Institute for Nanotechnology, Complex Photonic Systems Department of the University of Twente

Credit card fraud and identify theft are serious problems for consumers and industries. Though corporations and individuals work to improve safeguards, it has become increasingly difficult to protect financial data and personal information from criminal activity. Fortunately, new insights into quantum physics may soon offer a solution.

As reported in The Optical Society's (OSA) new high-impact journal Optica, a team of researchers from the Netherlands has harnessed the power of quantum mechanics to create a fraud-proof method for authenticating a physical "key" that is virtually impossible to thwart.

This innovative security measure, known as Quantum-Secure Authentication, can confirm the identity of any person or object, including debit and credit cards, even if essential information (like the complete structure of the card) has been stolen. It uses the unique quantum properties of light to create a secure question-and-answer (Q&A) exchange that cannot be "spoofed" or copied. *

Optica: Quantum-secure authentication of a physical unclonable key
Sebastianus A. Goorden, Marcel Horstmann, Allard P. Mosk, Boris Škorić, Pepijn W.H. Pinkse
Physic arXiv: Quantum-Secure Authentication with a Classical Key
Sebastianus A. Goorden, Marcel Horstmann, Allard P. Mosk, Boris Škorić, Pepijn W.H. Pinkse
Physics Today: Quantum security for your credit card, Richard J. Fitzgerald

* Phys.org: Fraud-proof credit cards possible with quantum physics

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Physics 2014...

First Realistic Virtual Universe (see 5 below)


In May cosmologists took the place on the pedestal by releasing the first simulated universe of such a large scale: it simulated 13 billion years of cosmic evolution in a cube with 350 million light year long sides. “Until now, no single simulation was able to reproduce the universe on both large and small scales simultaneously,” said the lead author Mark Vogelsberger.

1. Deepest Image of a Galaxy Cluster (January)
2. NASA Releases First Images Taken by the Curiosity Rover ( February)
3. The Discovery of Gravitational Waves (March), though there's some recent data that cast doubt.
4. NASA’s Exoplanet Discoveries (April)
5. The First Realistic Virtual Universe (May)
6. Hybrid Carbon Nanotube Circuits (June)
7. OCO-2 Launched (July) The OCO-2 will study carbon dioxide concentrations and distributions in the atmosphere.
8. Field Medals and IBM’s Neuromorphic Computer Chip (August)
9. Water Vapour Found on an Exoplanet + India’s First Probe to Mars (September)
10. Nobel Prizes (October), the winners were Isamu Akasaki, Hiroshi Amano and Shuji Nakamura, who were responsible for the development of the efficient blue light diodes.
11. Landing on a Comet (November), the first landing on the surface of a comet performed by the Rosetta spacecraft equipped with Philae landing module.
12. Planck 2014 Results (December)
The newest data suggests that the universe is 13.8 billion years old and is composed of 4.9 percent atomic matter, 26.6 percent dark matter and 68.5 percent dark energy.

Physics Database: Top Physics News of 2014

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Her Winter...


We first got wind of her problems on our visit to Austin in November, thinking only by suddenly not eating that she missed us, which I'm sure she did. She collapsed in front of her sitter. In a few days, she was back to her old rambunctious Labrador self. She later collapsed in front of us when we returned to New York. An early morning visit to the emergency room and MRI revealed a mass on her spleen. For Labradors and Golden Retrievers, as had happened before 11 years ago, this is sadly common. The mass for 2/3 of the cases is usually malignant. It draws blood from her circulatory system into her abdomen as happened to both of my Golden's years ago, clearly evident on the MRI. She gets tired easily on stairs she used to bound up and down; three handfuls of dog food now reduced to one that takes an entire day to devour. Surgery, radiation and chemo therapy may buy her 3 - 6 months, and is expensive. As both sons made their way here, I've been too preoccupied to blog anything about physics.



We saw her slip away slowly and finally in her vet's office at PetSmart Banfield Hospital under injected euthanasia. We all cried as she slipped into eternal slumber, her last acts in life to wag her tail, perk her ears; interact and kiss the tears of her young men - my sons - away. As intelligent as she was, this was the only thing she has ever failed at.



I will remember the floppy ears of a puppy that on a dead run stumbled over herself. I will remember how a hiss from our cat, Felix would send her darting away, despite at adulthood outweighing her by 60 lbs. I will remember the whole eaten pizza, the three devoured  Monte Cristo sandwiches and the apple pie! It was all hilarious, well before phone video and You Tube. It is now a part of memories of her.



I will remember tough days at work - be it engineering, teaching martial arts or high school physics - no matter what day I'd had, her resolution was enthusiasm, unconditional love and "let's play" with boundless energy, now sapped by a mass acting as an internal vampire.



I will remember her on my move from Texas to New York as my only friend for a while in a new place. She seemed only to greet me with opened maw - can't call it a smile - panting tongue and her famous "whipping tale of death" that hurt if she hit you with it inadvertently. Now, death has claimed her.



Her atoms, mine and my families originated in the same crucible that birthed the star we now call our single sun. Her ashes will make their way back to that celestial birthplace, passing perhaps Sirius, the Dog Star.



And when Entropy claims me one day, hopefully my atoms will find that place, and we Raven, will play!

March 11, 2004 - December 24, 2014, a little before the Spring equinox and a little after the Winter solstice. Rest in peace, girl.

Blogging will begin again 1 January 2015. See you next year.


Love,

The Goodwin Family: Cassandra, Robbin, Jonathan and Reggie (dad)
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K2...



The artistic concept shows NASA's planet-hunting Kepler spacecraft operating in a new mission profile called K2. Using publicly available data, astronomers have confirmed K2's first exoplanet discovery proving Kepler can still find planets.

Image Credit: NASA Ames/JPL-Caltech/T Pyle




NASA's planet-hunting Kepler spacecraft makes a comeback with the discovery of the first exoplanet found using its new mission -- K2.




The discovery was made when astronomers and engineers devised an ingenious way to repurpose Kepler for the K2 mission and continue its search of the cosmos for other worlds.




Lead researcher Andrew Vanderburg, a graduate student at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, studied publicly available data collected by the spacecraft during a test of K2 in February 2014. The discovery was confirmed with measurements taken by the HARPS-North spectrograph of the Telescopio Nazionale Galileo in the Canary Islands, which captured the wobble of the star caused by the planet’s gravitational tug as it orbits.




The newly confirmed planet, HIP 116454b, is 2.5 times the diameter of Earth and follows a close, nine-day orbit around a star that is smaller and cooler than our sun, making the planet too hot for life as we know it. HIP 116454b and its star are 180 light-years from Earth, toward the constellation Pisces.



NASA: NASA’s Kepler Reborn, Makes First Exoplanet Find of New Mission

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SETI Talk - Dr. Alexander...

Dr. Claudia Alexander - Geophysics, NASA Project Scientist, APS

Here we have a talk by Claudia Alexander who will explain the science background of some of the mysteries of comets including pros and cons about why we think comets might have brought Earth’s water, concepts regarding missing nitrogen in the outer solar system, and material the comet is made of. Finally Dr Alexander will set the stage for the landing and walk through the 60 hours of time spent on the comet’s surface. The initial findings are summarized as well.



Source: Physics Database

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Mars, Molecules and Methane...

Curiosity's "Space Selfie," Wikipedia. Video: The Telegraph

Reuters - NASA’s Mars rover Curiosity has found carbon-containing compounds in samples drilled out of an ancient rock, the first definitive detection of organics on the surface of Earth’s neighbor planet, scientists said on Tuesday.

The rover also found spurts of methane gas in the atmosphere, a chemical that on Earth is strongly tied to life. Additional studies, which may be beyond the rover’s capabilities, are needed to determine if the organic compounds and/or the methane gas were produced by past or present life on Mars or if they stem from geochemical processes.

“We have had a major discovery. We have found organics on Mars,” Curiosity lead scientist John Grotzinger, with the California Institute of Technology in Pasadena, Calif., said during a webcast press conference at a science meeting in San Francisco.

“The probability of any of these things being sources (from life) ... we just have to respect that it is a possibility,” he added.

Reuters Science: NASA rover finds organic molecules, methane gas on Mars, Irene Klotz

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Dark Matter Signal...

This ellipse shows a region of sky where a galaxy made of dark matter is thought to exist.
Astronomers may finally have detected a signal of dark matter, the mysterious and elusive stuff thought to make up most of the material universe.
While poring over data collected by the European Space Agency's XMM-Newton spacecraft, a team of researchers spotted an odd spike in X-ray emissions coming from two different celestial objects — the Andromeda galaxy and the Perseus galaxy cluster.
The signal corresponds to no known particle or atom and thus may have been produced by dark matter, researchers said.

Space.com: Cosmic Mystery Solved? Possible Dark Matter Signal Spotted, Mike Wall Eureka Alert: Researchers detect possible signal from dark matter

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ARM...

Source: Link below

KENNEDY SPACE CENTER, Fla. — NASA will weigh several factors when it makes a Dec. 16 decision on a plan for its Asteroid Redirect Mission (ARM), including how well each option supports later human missions to Mars, according to the agency official who will make that decision.


In an interview here Dec. 1, NASA Associate Administrator Robert Lightfoot said he will use a “matrix” of variables when deciding between two options for carrying out the robotic portion of ARM.

In one approach, called simply Option A by NASA, a robotic spacecraft would shift the orbit of a small near-Earth asteroid, up to ten meters in diameter, into an orbit around the Moon. The alternative, Option B, would use a robotic spacecraft to grab a boulder a few meters across from a larger asteroid and move that into lunar orbit.

“One of the main things I’m looking for is the extensibility to a martian mission,” Lightfoot said. Hardware proposed for ARM under each option should also be applicable for missions to the moons of Mars or even the martian surface itself, he said. “I want to build as little ‘one-offs’ as we can.”

Another factor will be potential commercial partnership opportunities for the mission. That would include, Lightfoot said, “commercial entities coming in to either help us do this or even take advantage of it once we’ve done it.” Other major factors he said he will consider are the technical and budgetary risks of each option.

 

Spacenews.com:
NASA To Weigh Several Factors in Decision on Asteroid Mission Option, Jeff Foust

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The Bauer Mythos...

Image source: Forbes

“The United States participated actively and effectively in the negotiation of the Convention. It marks a significant step in the development during this century of international measures against torture and other inhuman treatment or punishment. Ratification of the Convention by the United States will clearly express United States opposition to torture, an abhorrent practice unfortunately still prevalent in the world today. The core provisions of the Convention establish a regime for international cooperation in the criminal prosecution of torturers relying on so-called ‘universal jurisdiction.’ Each State Party is required either to prosecute torturers who are found in its territory or to extradite them to other countries for prosecution.”



- Ronald Reagan, President of the United States, 1984

Address to the Nation upon signing the UN Convention on Torture

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The Boys' Club...

Source: Radio Nessebar

Shanley Kane is the founder and editor of the most interesting and original of new publications that cover technology: Model View Culture, a quarterly journal and media site that offers readers a remorseless feminist critique of Silicon Valley. The critical distance expressed by the publication’s articles, essays, and interviews, where the Valley’s most cherished beliefs and practices are derided and deconstructed, was honestly won: Kane worked for five years in operations, technical marketing, and developer relations at a number of infrastructure companies in the San Francisco Bay Area. Often frustrated by the unexamined assumptions of her industry and irritated by the incompetence of her managers, she began blogging about technology culture and management dysfunction at startups, which led to Model View Culture (the name is a play on a technology, familiar to software developers, used to create user interfaces), founded a year ago. She maintains a lively and often profane Twitter persona, where she caustically dismisses the arguments of the kinds of men who tried her patience when she worked for them, and generously amplifies the ideas of writers and thinkers she admires, mostly women and minorities. She spoke to MIT Technology Review’s editor-in-chief, Jason Pontin.



(Disclosure: MIT Technology Review subscribes to Model View Culture, as it subscribes to many other publications, and Jason Pontin once made a small contribution to support an issue of the journal.)



“We are not getting hired, and we are not getting promoted, and we are being systematically driven out of the industry.”



“In the upper levels of tech, you are generally dealing with white men who have been coddled their entire lives, and they have rarely encountered even mild criticism.”



MIT Technology Review: A Feminist Critique of Silicon Valley, Jason Pontin

Tomorrow: The Bauer Mythos

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Einstein's Dead Sea Scrolls...

Source: Link below

On the sexist treatment of Madame Curie (fellow Nobel Laureate):

The treatment to which Einstein referred included the fact that the French Academy of Sciences denied her application for a seat, possibly because of rumors that she was Jewish — or because she was having an affair with a married man, the physicist Paul Langevin.

“I am convinced that you consistently despise this rabble,” Einstein wrote, “whether it obsequiously lavishes respect on you or whether it attempts to satiate its lust for sensationalism!”

“Anyone who does not number among these reptiles,” he said of her critics, “is certainly happy, now as before, that we have such personages among us as you, and Langevin too, real people with whom one feels privileged to be in contact.”

Einstein concluded that “[i]f the rabble continues to occupy itself with you, then simply don’t read that hogwash, but rather leave it to the reptiles for whom it has been fabricated.”

On the discrimination against African Americans:

“Even among these there are prejudices of which I as a Jew am clearly conscious,” he continued, “but they are unimportant in comparison with the attitude of the ‘Whites’ toward their fellow-citizens of darker complexion, particularly toward Negroes. The more I feel an American, the more this situation pains me. I can escape the feeling of complicity in it only by speaking out.”

Einstein then addressed the complaints of those who have had “unfavorable experiences…living side by side with Negroes” which have led them to believe “[t]hey are not our equals in intelligence, sense of responsibility, reliability.”

“I am firmly convinced that whoever believes this suffers from a fatal misconception,” he wrote. “Your ancestors dragged these black people from their homes by force; and in the white man’s quest for wealth and an easy life they have been ruthlessly suppressed and exploited, degraded into slavery. The modern prejudice against Negroes is the result of the desire to maintain this unworthy condition.”

“The ancient Greeks also had slaves,” he wrote. “They were not Negroes but white men who had been taken captive in war. There could be no talk of racial differences. And yet Aristotle, one of the great Greek philosophers, declared slaves inferior beings who were justly subdued and deprived of their liberty. It is clear that he was enmeshed in a traditional prejudice from which, despite his extraordinary intellect, he could not free himself.”

The "Dead Sea Scrolls of Physics" online: Princeton Einstein Papers
#P4TC: Einstein

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Artificial Skin...

Source: Link below

Some high-tech prosthetic limbs can be controlled by their owners, using nerves, muscles, or even the brain. However, there’s no way for the wearer to tell if an object is scalding hot, or about to slip out of the appendage’s grasp.






Materials that detect heat, pressure, and moisture could help change this by adding sensory capabilities to prosthetics. A group of Korean and U.S. researchers have now developed a polymer designed to mimic the elastic and high-resolution sensory capabilities of real skin.



The polymer is infused with dense networks of sensors made of ultrathin gold and silicon. The normally brittle silicon is configured in serpentine shapes that can elongate to allow for stretchability. Details of the work are published today in the journal Nature Communications.


MIT Technology Review:
Artificial Skin That Senses, and Stretches, Like the Real Thing, David Talbot

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Nanobuds...

A nanobud consists of a tube of carbon atoms with a bud-like appendage.

Transparent films containing carbon nanobuds—molecular tubes of carbon with ball-like appendages—could turn just about any surface, regardless of its shape, into a touch sensor.



The films were developed by a Finnish startup, Canatu, and could be used to add touch controls to curved automobile consoles and dashboards, for example. The films are rugged and can be repeatedly bent around something as thin as the cord for your earbuds, so they could be handy for adding buttons to flexible devices.



Touch screens are usually made by overlaying a display screen with a transparent sheet of indium tin oxide. This material is brittle, however, and can’t be used on anything other than a flat surface. Individual carbon nanotubes have long been seen as a promising alternative because they conduct electricity so well. But carbon nanotubes have performed badly in touch screens due to poor electrical connections between different nanotubes. Carbon nanobuds are better because the ball-like appendages are particularly good at emitting electrons, which improves those electrical connections.



MIT Technology Review:
“Nanobuds” Could Turn Almost Any Surface Into a Touch Sensor, Kevin Bullis

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