Reversing optical “shockwaves” using metamaterials (updated)

ResearchBlogging.orgIn a recent issue of Physical Review Letters was an article with the intriguing (to me) title of “Experimental verification of reversed Cherenkov radiation in left-handed metamaterial,” by a collaboration from Zhejiang University in China and MIT.  The paper is an experimental verification of an effect predicted for metamaterials way back in 1968 by the originator of metamaterials research, Victor Vesalago, in his original paper, “The electrodynamics of substances with simultaneously negative values of ε and μ.”

Čerenkov radiation (I prefer this spelling) is an effect analogous to the sonic boom created by projectiles moving faster than the speed of sound.  Čerenkov radiation is emitted by ultra-high speed charged particles moving in matter.  In ordinary matter, this radiation travels along the direction of motion of the particle; in a negative refractive index material, Vesalago predicted that Čerenkov radiation will travel in a direction opposite of the direction of the particle. Now, we have some preliminary experimental evidence supporting this prediction.

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Posted in Optics | 7 Comments

Benjamin Franklin’s words on the Constitution

On Tuesday night, almost on the eve of a historic Senate vote on expanding health care coverage for Americans, hundreds of people congregated outside of Joe Lieberman’s Connecticut house in a candlelight vigil to advocate for healthcare reform. The vigil, organized by the Interfaith Fellowship for Universal Healthcare, included rabbis who appealed to Lieberman’s conscience to make him to the right thing and support reform.  From the Danbury News Times,

STAMFORD — Quietly holding candles, hundreds of clergymen, congregants and reform advocates lined the sidewalks outside Independent U.S. Sen. Joe Lieberman’s Stamford home Sunday night in a show of support for universal health care.

“When we heard not only would he vote against it, but he’d use his power, his position as a swing vote … to block it from coming to a vote, we had to send a message so he knows people who vote overwhelmingly favor the public option,” said Rabbi Stephen Fuchs, of Congregation Beth Israel in West Hartford.

The vigil began at Stamford High School, Lieberman’s alma mater, and ended at the senator’s home, the Hayes House, across the street.

“In some sense, it’s poetic,” said Stamford Mayor Dannel Malloy, who attended the vigil. “The place where Sen. Joseph Lieberman received his high school education, the place he visited upon his announcement to seek the vice presidency, a place where his run for the presidency began — and it just so happens, a place across the street from where he lives.”

Lieberman is going so far as to say that he’ll filibuster health care because he doesn’t believe that a public option will work.  He is, in essence, saying that his knowledge and “understanding” is much deeper than health care experts, the nonpartisan Congressional Budget Office, the evidence of every other industrialized nation’s government health care systems and, quite frankly, a majority of the American people.

Putting aside the question whether Lieberman is sincerely critical of the idea of a public option or just continuing the disingenuous douchebaggery he’s been known for ever since losing his Democratic primary, I thought this was a good time to remind folks of another man who had doubts about a big piece of legislation.  He was a big enough man, however, to realize that he was not the wisest person on earth.  (This realization, however, ironically meant that he probably was.)

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Posted in Politics | 3 Comments

The Giant’s Shoulders #17 — Darwin Sesquicentennial Edition — is up!

The seventeenth edition of The Giant’s Shoulders is up at The Primate Diaries!  Eric Michael Johnson put together an excellent Darwin Sesquicentennial Edition!

The deadline for the next edition is December 15th, and it will be held at Just a mon.  Entries can be submitted through blogcarnival.com or directly to the host blog, as usual!

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ResearchBlogging editor’s selections: water on the sun, nanotubes in the garden, mysterious magnetic field reversals, and ancient Chinese roads

  • Water on the Sun. If you thought finding water on the moon was surprising, let Invader Xan at Supernova Condensate explain how water has now been found on the surface of the Sun!
  • Sprucing up your garden with carbon nanotubes. Carbon nanotubes have been hyped for applications as diverse as paper batteries and space elevators.  Now, Michael Long at Phased describes a very unusual application of the exotic material: helping your tomato plants grow!
  • The amazing disappearing asymmetric magnetic reversals. On a geological timescale, the Earth’s magnetic field occasionally ‘flips’ direction; the study of such paleomagnetism gives interesting insight into the Earth’s geological history.  But Chris Rowan at Highly Allochthonous discusses research that suggests that the behavior of the magnetic field has been even more complicated than previously appreciated.  Or has it?
  • Road Redux. Road construction can have a huge negative impact on the ecosystems they are carved through.  Instead of using new techniques to reduce this impact in mountain regions, others are considering a technique that dates back to the Qin dynasty in China!  Roberta Kwok of Journal Watch Online discusses the research.

Check back next Monday for more “miscellaneous” highlights!

Posted in General science, Science news | 1 Comment

It’s confirmed; my cats are trying to kill me

I never believed it when people told me that their cats are trying to kill them.  Well, I never believed it until last night.  The wife and I were watching television, and I got up to make some popcorn.  While I was returning with two small bowls for us, our kitty Sabrina thought that it would be a good time to pounce at my foot!

She didn’t actually grab me, but she managed to get her paw under my foot as I was putting it down.  To avoid stepping on her, I stumbled  forward — and completely hyperextended my big toe in the process.  It is now completely swollen and painful, and I’ve spent most of Saturday off my feet playing videogames.  (Though it is arguable that I would have done that anyway.)

Sabrina has acted remorseful all day, coming up to me and rubbing her head up against me, something she typically doesn’t do.  I’m not fooled, though; this was a dry run before my eventual elimination.  The wife claims that it wasn’t intentional, and that she acted alone, but I have my doubts.  Would you trust a face like this?

sabrina_comforter

Or this?

zoe_dresser

Or this?

sasha_snooze

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Posted in Animals, Silliness | 3 Comments

Henry Kuttner’s Destination Infinity

Henry Kuttner is, for me, one of those authors who never disappoints, and is always thought-provoking.  He had an incredibly vivid imagination, and each of his works is absolutely unique, seamlessly blending pulp adventure with science fiction.  I’ve discussed a number of his stories previously on this blog, and I’ve loved each one of them.  Most recently, I sat down to read Destination Infinity (1956), originally published with the title Fury (1947):

destinationinfinity

(Image taken from fantasticfiction.co.uk.)

This novel is the first of Kuttner’s that I’ve read that is wholeheartedly science fiction; it is also the first novel of his that features an anti-hero!  However, it still retains the flavor of Kuttner’s earlier pulp adventures, and is a lot of fun.

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Posted in Science fiction | 2 Comments

ResearchBlogging editor’s selections: Thermodynamic CEOs, tidal landslides, alien fossils, and anime

Check back next Monday for more “miscellaneous” highlights!

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Oldest preserved spider web found in amber

This is one of those stories that just fills one with awe about the ancientness of life on earth.  Via The Great Orange Satan, I found this article in Wired about an amazing discovery:

The world’s oldest known spider web has been discovered on a beach in Sussex, England, trapped inside an ancient chunk of amber.

Scientists found the rare amber fossil in December, and have now confirmed that it contains remnants of spider silk spun roughly 140 million years ago by an ancestor of modern orb-weaving spiders. After slicing the amber into thin sections and examining each piece under a high-powered microscope, the researchers discovered that the ancient silk threads share several features common to modern spider webs, including droplets of sticky glue used to hold the web together and capture prey.

Spiders have been doing their web-spinning thing for at least 140 million years. That’s just amazing.

(More physics posts in the works, for those who are wondering what I’ve been up to.)

Posted in Animals, Science news | Leave a comment

John Grant’s Bogus Science

About two years ago, I had the pleasure of happening across and reading John Grant’s book Corrupted ScienceCorrupted Science deals with the systematic weakening, ignoring, and suppression of scientific reality for political purposes; examples include the disastrous Lysenkoism of Stalin’s Russia and the potentially catastrophic ignoring of evidence for man-made climate change.  Corrupted Science (CS) was Grant’s second book, following Discarded Science, which describes those scientific ideas that in the end turned out not to be true.

The other day, wandering through the exact same Barnes & Noble where I found CS two years ago, I found that Grant has a new book out exploring similar themes to his previous two, Bogus Science; or, Some People Really Believe These Things:

Bogus Science_fullsize

Where DS dealt with wrong science in the scientific community and CS dealt with wrong science in the political theater, BS focuses down and takes a look at individual kooks, crackpots, and frauds and their perversion of established science (and reality).

The book is very good; as a first statement I can highly recommend it.  There were also a few  aspects of it, however, that made me like it a little less than his previous book.

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Posted in ... the Hell?, General science, Science news | 3 Comments

Horror writers on horror films, from Focus Features

A few days ago, I got a nice email from FilminFocus.com, the film culture website of film company Focus Features (A Serious Man, Brokeback Mountain, Coraline).  For Halloween, they asked five horror writers to each list their five favorite horror movies.  Some of the names I’m familiar with — Kim Newman, Joe R. Lansdale, Tananarive Due — and others are new to me, but their choices are all interesting, even though there are some that I wouldn’t necessarily agree with (Carnival of Souls?  Really?).

You can read the list here.

Though I’m not a professional horror author (yet), I thought I’d chime in with my own set of movies that disturb me!   This list is by no means complete — after all, it’s only five — but it is indicative of what unsettles me…

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Posted in Entertainment, Horror | 3 Comments