Boo! The optics behind “ghost” imaging

Posted on October 31, 2009 by skullsinthestars

ResearchBlogging.orgHalloween seemed like the perfect time to talk about an unconventional sort of optical imaging, referred to as “ghost” imaging.  I should point out at the beginning, however, that I’m not talking about this sort of ghost imaging:

tulipstaircaseghost

Don’t get too disappointed, however!  Ghost imaging is in fact a fascinating and relatively new technique in which a detector can produce an image of an object that it cannot see!  The physics behind this effect is somewhat subtle, and resulted in at least one minor controversy since its introduction.  Let’s take a look at it…

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Posted in Optics | 2 Comments

Halloween treats 2009

Posted on October 30, 2009 by skullsinthestars

It’s time again for my yearly dose of Halloween chills, courtesy of some classic horror stories!  The 2007 edition can be found here, and the 2008 edition can be found here.  Have a happy Halloween!

The Willows, Algernon Blackwood.  This tale is long, but is one of the absolute classics in the genre of “cosmic horror”, and one of the major inspirations for H.P. Lovecraft’s work.  Two men, canoeing down an isolated stretch of the Danube, escape rising flood waters by sheltering on a small island on the river.  They soon realize, though, that they have stumbled within reach of beings from outside of time and space — beings that threaten their lives, sanity and souls.

Number 13, M.R. James.  A visitor to Viborg decides to lodge at the Golden Lion, and chooses to stay in room 12, which has a lovely view of the street.  At night, however, his room seems smaller, and on the building across the street he can see shadows of the occupants of room 13 — a room which doesn’t exist during the day…

The Shadows on the Wall, Mary Wilkins Freeman.  A story of domestic horror.  A family struggling to recover from a terrible tragedy finds their efforts hindered, and haunted, by the presence of a shadow on the wall without a source.

Mysterious Maisie, Wirt Gerrare.  A very unsettling story about a woman who takes a job as a maid but finds herself a prisoner of a cult-like group that have unpleasant plans for her.  These plans involve a mysterious visitor to the home who seems not quite human… (Only available through archive.org; you can download the story collection or read it online at the link.)

The People of the Pit, A. Merritt. Explorers of the northern Alaskan wilderness happen across a man who has crawled until his hands are little more than ragged stumps!  He tells a story of a deep pit, a lost city within it… and the people of the pit.

Posted in Horror | 4 Comments

The “curse” of success in science

Posted on October 29, 2009 by skullsinthestars

(This post may seem like boasting just as much as it seems like complaining, for which I apologize in advance.)

Those who are regular readers of this blog may have noticed that things have been a little quiet again for the past couple of weeks.  It turns out that I’ve been almost entirely buried under a mass of bureaucratic tasks, which I’ve managed to dig myself out from under, at least for a while.

As a graduate student and post-doc, I always marveled at how senior researchers would burden themselves with a large number of bureaucratic tasks, such as journal editing, academic committees, article reviewing, proposal reviewing, and conference organizing.  I confidently reassured myself that I would never allow such tasks to bog me down and take away from my true academic love, namely research.

What I hadn’t counted on is the fact that, as I’ve become more established and well-known in my field, I’ve made friends with lots of people who are journal editors, conference planners, and book publishers.  I end up refereeing some 20 papers a year for journals, simply because I’m friends with a large number of editors.  This year, I’ve taken a rather high-up role in the organizing of a major optics conference, primarily because two friends asked me if I could help them out.

I can’t complain too much, because it is quite flattering to be asked to help with these things, and it is quite interesting to see how things work behind the scenes at journals, conferences and publishing houses.

It may be a little too enlightening, however.  When I was younger, there were a number of conferences I attended where I thought to myself, “Who organized this mess?”  Today I realize that it was probably someone like me: a person hesitantly agreeing to accept an organizing role and now scrambling to get the pieces to fit together as a coherent whole.

The situation is analogous to growing older in general.  As children, we tend not to worry about things too much because the “grown-ups” are in charge and will take care of everything.  Then, inevitably, you suddenly realize one day that you are now the grown-up — and nobody gave you an instruction manual for the job!

Posted in ... the Hell?, General science | 7 Comments

ResearchBlogging editor’s selections: autumn leaves, relativistic rockets, galaxy-size telescopes, and human origins

Posted on October 26, 2009 by skullsinthestars
  • Fall Colors and Autumn Leaves. Before you go out to view the fall foliage this year, take a look at this post by David Bradley at SciScoop Science Forum!  Researchers are seeking an explanation as to why leaves in the U.S. mainly turn red, while in Europe they mainly turn yellow.
  • When you can’t wait for relativistic rockets. Before you start packing your bags for your intergalactic vacation, you should read this post by Greg Fish at weird things.  He discusses the hype and reality behind an article in Popular Mechanics on a new proposal for relativistic rocket flight, and its connection to the LHC.
  • When telescopes get really, really big. Rita Tojeiro at we are all in the gutter describes the use of gravitational lensing to probe the earliest and most distant parts of our universe, essentially turning entire galaxies into telescopes!
  • Reexamining Ardipithecus ramidus in Light of Human Origins. Finally, Eric Michael Johnson at The Primate Diaries takes a critical look at one new interpretation of human origins to arise from Ardi, and shows that the lure of a good narrative often leads people to speculate beyond the available evidence.

Check back next Monday for more “miscellaneous” highlights!

Posted in General science, Science news | Leave a comment

Lord Rayleigh on Darwin

Posted on October 24, 2009 by skullsinthestars

There are lots of fascinating connections one can uncover by browsing the history of science.  In my search for Lord Rayleigh’s invisibility research, I happened across a paper titled, “Insects and the colours of flowers,” published in Nature 11 (1874), 6.  This comment by Rayleigh is short enough to be reproduced in full:

There is one point connected with Mr. Darwin’s explanation of the bright colours of flowers which I have never seen referred to.  The assumed attractiveness of bright colours to insects would appear to involve the supposition that the colour-vision of insects in approximately the same as our own.  Surely this is a good deal to take for granted, when it is known that even among ourselves colour-vision varies greatly, and that no inconsiderable number of persons exist to whom, for example, the red of the scarlet geranium is no bright colour at all, but almost a match with the leaves.

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Posted in General science, History of science | 2 Comments

ScienceOnline 2010!

Posted on October 23, 2009 by skullsinthestars

As Bora has noted, registration for ScienceOnline 2010 is now open — and I’ll be there!

I was worried for a bit, because interest in the conference is high, and there are limited spots available, but I managed to get in just fine.  I won’t be presiding over any sessions this year, but I’m looking forward to hearing what people have to say, catching up with all the friends I met last year, and finally meeting in person folks that I’ve only traded bytes with.

Hope to see lots of you there!

Posted in Personal, Science news | Leave a comment

The Man Who Rocked the Earth, by Arthur Train and Robert Williams Wood

Posted on October 21, 2009 by skullsinthestars

A few posts ago, I noted that physicist R.W. Wood was one of the earliest scientists to contemplate issues of invisibility.  While researching his work, I noted that he was also a science fiction author, having penned two books with Arthur Train, The Man Who Rocked the Earth (1915) and The Moon Maker (1916).

I was immediately intrigued; scientists are often stereotyped as unimaginative and humorless types, and are certainly not considered to be artistic enough to write a novel!  This of course is an unfair generalization; there are plenty of science-types who can write a great science fiction story.

So what about Wood — did he have the skills to write science fiction?  I would say yes!  I really enjoyed MWRE; it captured my interest from the first moment and kept it throughout.  The writing is crisp and to the point: it probably didn’t hurt that Wood’s coauthor Arthur Train was already established as a writer of legal thrillers.

The novel tells the story of world-changing events influenced by a mysterious and seemingly all-powerful scientist known as “Pax”.  Pax gives humanity an ultimatum: either change its ways and end all wars, or face worldwide destruction.

Continue reading →

Posted in Science fiction | 11 Comments

ResearchBlogging editor’s selections: placebos, climate change, and charge-shift bonds

Posted on October 19, 2009 by skullsinthestars

This week’s posts all got me thinking about familiar ideas in a whole new light:

  • Deconstructing the placebo. The placebo effect is so well-known that it is almost taken for granted at times.  However, it is known that placebos have become more effective in recent years.  At Neuroskeptic, blogger neuroskeptic talks about research that suggests we must look at the idea of placebos in a new light.
  • Food and climate change – save or doom the world while eating. Here’s another thing to worry about with respect to climate change!  Benno Hansen at Think About It describes how the food choices we make can contribute to the greenhouse effect.
  • Climate Change – what’s worse than the heat? Speaking of climate change, Christie at Observations of a Nerd talks about a problem worse than global warming: the acidification of the oceans that will come with it.
  • An Unrecognized Type of Chemical Bonding. How have I missed this before?  Most of us have heard of ionic and covalent bonding in chemistry, but Michael at Phased describes a third, relatively unknown form of chemical bonding: charge-shift bonding.

Check back next Monday for more “miscellaneous” highlights!

Posted in General science, Science news | Leave a comment

Frontiers in Optics: T,W,Th

Posted on October 17, 2009 by skullsinthestars

One of the things that happens to me as the years go by is that I spend less time at meetings listening to talks and more time talking to friends and colleagues and planning new research collaborations.  From discussions with said colleagues, I get the feeling that this shift in emphasis is not unique to me.  (I suppose this is why young professionals make better conference bloggers.)

So for my discussion of the last three days of the conference, let me just point out a few general observations that I had while attending.

Continue reading →

Posted in Optics, Science news | 4 Comments

The Giant’s Shoulders #16 is up!

Posted on October 16, 2009 by skullsinthestars

The sixteenth edition of The Giant’s Shoulders is up at Quiche Moraine!  A hearty thanks to Greg for assembling it!

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

Posted in General science, Science news | Leave a comment