Perpetual motion — nonsense for over 100 years

Posted on March 10, 2010 by skullsinthestars

Some two years ago, I wrote a post about a device called the “whipmag”, a thinly-disguised perpetual motion machine based on magnets that would supposedly accelerate without an external source of energy once set in motion.  I was understandably critical of the device, and free energy has yet to reach the masses, but that doesn’t stop people from being true believers.  Last week, I received the following comment on the post (written two years ago, mind you):

Neither the author of this article nor the guy in the second video actually gives any data or analysis applicable to the device in the first video. The author’s diagram does not reflect the structure of the device in the video. Also the author mentions several times “conservation of energy” and “thermodynamics” laws, but does not apply those concepts to explain how the device could not work. Thus no analysis has taken place in this article, only emotional oversimplification ( just like the second video guy ) and a trail of distracting mini history lessons.

The complaint seems to be that I don’t actually spend my time proving that the device can’t work.  My answer to this is that I don’t have to!  At this point, such devices have been debunked so often and the laws of physics so well understood that the onus is on any would-be perpetual motion discoverer to demonstrate that their device does work, and ideally explain why.

It is especially amusing to hear criticism of “mini history lessons”.  Science is a process which builds upon all knowledge that has come before; what we have discovered previously — scientific history — is crucial.  It would be impossible for science to progress if we spent all of our time, in the absence of new evidence, testing schemes that we know have already failed.

With that in mind, it is worth pointing out that perpetual motion has been considered impossible — and treated with scorn — for a long, long time.  When I dug up the first volume of The Harmsworth Magazine, dated 1899, to seek out a story by Winston Churchill, I also found a popular article on perpetual motion. It is not kind to the concept, or the people who pursue it.

Continue reading →

Posted in ... the Hell?, History of science | 24 Comments

7 days until The Giant’s Shoulders #21!

Posted on March 8, 2010 by skullsinthestars

There’s 7 days left until the deadline for The Giant’s Shoulders #21!  It will be held at PACHSmörgåsbord, and entries can be submitted through blogcarnival.com or directly to the host blog, as usual!

We still could REALLY use some more hosts for the carnival!  If you’ve got a blog and want to see the history of science carnival continue, please consider being a host!

Posted in General science, Science news | 2 Comments

ResearchBlogging editor’s selections: chimps with tools, moon-bases, shrinky dink science, and earthquake predictions

Posted on March 8, 2010 by skullsinthestars
  • Uncovering the “Chimpanzee Stone Age”. First, from Brian at Laelaps we have a discussion of stone tool use in chimpanzees — and the archaeology of such tool use!
  • Will the Moon mess up a moon-base? For all the talk of setting up a base of operations on the Moon, it is quite easy to forget that it is a relatively hostile environment.  Emma at we are all in the gutter discusses clever attempts to evaluate damage to equipment that was left behind on our previous visits.
  • Shrinky Dinks Thermoplastics: Toying With Cutting Edge Research. In a technological advancement I would never have seen coming, Robert at Promega Connections discusses a new, potentially easy and inexpensive, technique for performing microfluidic research.  The inspiration for the work is Shrinky Dinks!
  • Science predicted the Chile’s Earthquake. Finally, Pablo of Astu’s Science Blog, who experienced the earthquake in Chile firsthand, explains how science predicted the force and the location of the earthquake remarkably well.

Check back next week for more “miscellaneous” suggestions!

Posted in General science, Science news | 2 Comments

The oldest LOLcat?

Posted on March 7, 2010 by skullsinthestars

While researching another science post, I came across the following image:

The image is from The Harmsworth Monthly Pictorial Magazine, vol. 1 (1898-1899), at the end of the introduction to the magazine by Alfred C. Harmsworth.  This seems to be an early version of an LOLcat, popularized by I Can Has Cheezburger!  Though I wouldn’t exactly call it “laugh out loud”, the picture is a captioned image of cats with the caption in the cat’s own voice (hence the “we”).

I’m wondering if this is the oldest LOLcat found yet — the oldest one I’m aware of comes from 1905, seven years after the Harmsworth image.

I’ve said it before, and I’ll say it again — one finds all sorts of interesting things while wandering through old journals and magazines…

Posted in ... the Hell?, Animals, Silliness | Leave a comment

ResearchBlogging Awards voting open!

Posted on March 6, 2010 by skullsinthestars

I should remind folks that voting is now open for the ResearchBlogging Awards 2010!
Research Blogging Awards 2010
If you are a research blogger and have an account on ResearchBlogging.org, don’t forget to vote for your favorite research blogs in a variety of categories, including the Research Blog of the Year, for which I have been nominated!

I would encourage people to vote for me, but I don’t want to overstep my bounds and get banned from the awards ceremony and accompanying party.  (There is going to be a ceremony and party, right?  Right?)

Posted in Personal, Science news | Leave a comment

Rolling out the (optical) carpet: the Talbot effect

Posted on March 4, 2010 by skullsinthestars

ResearchBlogging.orgOne of the wonderful things about having a career in science is that a deeper understanding of the science leads to a greater appreciation of its beauty.  In physics, this usually requires a nontrivial amount of mathematics, but there are some phenomena that are self-evidently beautiful; unfortunately, many of these are also not very well known!

In working on my textbook on optics, I delved rather deeply into one of these phenomena, known as the optical Talbot effect.  First observed in 1836 by Henry Fox Talbot, the effect went unnoticed for nearly fifty years before being rediscovered by the great Lord Rayleigh in 1881. The true subtlety of the phenomenon was still not understood, however, for another hundred years!

In short, the Talbot effect can be described as the self-imaging of a diffraction grating: at regular distances from the grating, the light diffracted through it forms a nearly perfect image of the grating itself. This simple statement does not do justice to the Talbot effect, however, which results in stunning images such as:

This is an example of what is known as a Talbot carpet,  presumably because it is reminiscent of an ornate Persian rug:

(Why isn’t it called a “Talbot rug”?  That I can’t answer.)

There’s a lot to explain in order to understand the significance of the Talbot carpet, starting with an explanation of what exactly a diffraction grating is!

Continue reading →

Posted in Optics, Physics | 31 Comments

ResearchBlogging editor’s selections: archaeoacoustics, baboon friendships, and the teapot effect

Posted on March 1, 2010 by skullsinthestars
  • Echoes of the past. We begin with teofilo at Gambler’s House, describing fascinating speculation that the former residents of Chaco Canyon may have chosen the site for their home based on its acoustic properties.  (I’ve resolved to visit the site one day.)
  • “You just call out my name…”: Friendships in Male and Female Baboons. Male and female baboons have long been known to form friendships not related to reproduction, but why?  Brian at Laelaps discusses research done in Kenya to answer this question.
  • The teapot effect, end of. Finally, aimeew at misc.ience shows again how science, in this case physics, is constantly working to make our lives better!  Researchers have come up with a solution for “the teapot effect”; I’ll let you click through to the link to find out what that is…

Check back next week for more miscellaneous highlights!

Posted in Uncategorized | 3 Comments

Research Blog of the Year finalist!

Posted on February 25, 2010 by skullsinthestars

Today I received a very pleasant surprise: this blog has been nominated as a finalist for Research Blog of the Year!  This is the highest award of a new series of awards based on ResearchBlogging.org and sponsored by Seed Media Group.  My blog is one of ten finalists that were picked by an expert panel of judges from a set of some 400 that were nominated.

I don’t think it really hit me right away how much this means to me, and how much I appreciate being chosen as a finalist.  This blog really started, like many do, as a hobby that I never necessarily thought would garner much attention, and it is really great to get such an affirmation that I’m doing something right!

The final choice for “blog of the year” will be made by the community of research bloggers, namely those who are registered and blog through ResearchBlogging.org.  From the announcement:

Voting for the winners will be conducted by invitation to bloggers registered with ResearchBlogging.org. Invitations will be sent on Thursday, March 4. If you’re registered with us, you may want to check your account to make sure your email address is up-to-date. If you’re not registered (and you blog about peer-reviewed research), you still have time to register so you can vote. Visit this page for more information.

I don’t really expect to win — I’m up against some really stunningly awesome competition — but if you’re a research blogger, I hope you’ll consider throwing me a vote!

In any case, I’ve always heard that “It’s an honor just to be nominated,” and now that I’m in that position I can really say that it’s true!  (I should also say “thank you” to the person or persons who put my blog up for the awards in the first place.)  I’m also delighted that I get to put this badge on my blog:

Research Blogging Awards 2010 Finalist

Speaking of research blogging, I really need to get back to some — my impending book deadline has been eating up all my non-work time recently!  I do have a post on the Talbot effect that I’ll hopefully put up in a few days; it took me almost a month to decide how to explain the effect with a minimum of mathematics!

Update: For those stopping by from the “finalist” page, to see some of my research blogging please check out my “physics“, “optics“, and “history of science” categories!  As I noted above, my blog has been a little quiet lately due to numerous deadlines.

Posted in Personal | 7 Comments

A WTF scientific paper from Edinburgh, 1884

Posted on February 24, 2010 by skullsinthestars

I’m still quite busy finishing off my book, and a grant proposal in the meantime, but I thought I’d share a very odd paper from the Proceedings of the Royal Society of Edinburgh 13 (1884), 23-24, entitled, “Extraordinary occurrence at House No. 7 York Place”.

One of the fun things about old journals are the miscellaneous “reports” sent in about unusual phenomena seen in the field, often by non-scientists.  Perhaps my favorite example of this comes from the very first volume of the Philosophical Transactions of the Royal Society in 1665, “An account of a very odd monstrous calf,” by Robert Boyle.  This was the fifth paper ever published in a scientific journal, a fact that I find very amusing for some reason.

The paper I want to describe carries the sub-heading, “(The following notice was sent to the General Secretary, from the Office of Messrs Hunter, Blair and Cowan, W.S.)”.  I can’t really do it justice without quoting it in its entirety:

Continue reading →

Posted in ... the Hell?, History of science, Physics | 11 Comments

“The Wicker Tree?” (Updated)

Posted on February 23, 2010 by skullsinthestars

This one was an immediate WTF moment for me: Robin Hardy, the writer/director of the original version of the film The Wicker Man (1973), is “reimagining” his film as The Wicker Tree, slated for release sometime this year:

For those who aren’t familiar with the original film, it is undeniably a classic of the horror genre and in my opinion one of the greatest horror films of all time: subtle, atmospheric, darkly humorous, and genuinely horrifying*.

Details are sketchy as it stands; the official movie site is little more than an image right now.  IMDB has the following summary, which may or may not be accurate:

Young Christians Beth and Steve, a gospel singer and her cowboy boyfriend, leave Texas to preach door-to-door in Scotland . When, after initial abuse, they are welcomed with joy and elation to Tressock, the border fiefdom of Sir Lachlan Morrison, they assume their hosts simply want to hear more about Jesus. How innocent and wrong they are.

I’m definitely of mixed emotions about this news.  On the one hand, I’m horrified (and not in a good way); an abysmal remake of The Wicker Man was just recently released in 2006 and illustrates that there is no lower limit on the quality of such projects.  On the other hand, The Wicker Tree is by the original writer/director, and he has seen fit to bring back Christopher Lee as Lord Summerisle, one of the most inspiring castings of all time.

I suppose we’ll just have to wait and see…

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* Seriously — this film has one of the most cringe-inducing moments of any horror movie I’ve ever seen, and shames a lot of the “extreme” modern horror films.

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Update: As long as I’m talking about unusual movie projects, I see IMDB has a trailer up for the Solomon Kane movie, “based” on the character by Robert E. Howard.  I’m not sure what to think, as yet: it might end up being an enjoyable movie, but it doesn’t look, or sound, much like Howard’s Solomon.  The IMDB summary says a lot:

A mercenary who owes his soul to the devil redeems himself by fighting evil.
Howard’s Solomon is a fanatical Puritan who fights the devil’s works overly wherever he goes!  It is pretty much impossible to imagine that character having made a deal with the devil, as the summary and trailer implies.
Posted in ... the Hell?, Entertainment, Horror, Robert E. Howard | 2 Comments