August 9, 2008

Hanny’s Voorwerp new cosmic object

Filed under: Science by Branko Collin @ 8:12 am

Amateur astronomer by night and primary school teacher by day Hanny van Arkel discovered this little green man-cloud in the sky, and promptly got it named after herself: Hanny’s Voorwerp (voorwerp = “object”). When I say little, I mean huge.

Van Arkel, who hails from Heerlen in Limburg, made her discovery as part of a distributed computing project called Galaxy Zoo, in which volunteer participants are asked to classify images from the Sloan Digital Sky Survey according to a list of known celestial objects. The Voorwerp wasn’t on that list.

A guess of what the object could be comes from astronomer Bill Keel. Quoting the Galaxy Zoo blog:

A hundred thousand years ago, a quasar blazed behind the stars which would have already looked recognizably like the constellation Leo Minor. Barely 700 million light-years away, it would have been the nearest bright quasar, shining (had anyone had a telescope to look) around 13th magnitude, several times brighter than the light of the surrounding galaxy. This galaxy, much later cataloged as IC 2497, is a massive spiral galaxy which was in the process of tidally shredding a dwarf galaxy rich in gas – gas which absorbed the intense ultraviolet and X-ray output of the quasar and in turn glowed as it cooled. But something happened to the quasar. Whether it turned off, dropped to a barely simmering level of activity as its massive black hole became starved for gas to feed its accretion, or it was quickly shrouded in gas and dust, we don’t see it anymore.

But we see its echo.

Astronomers are apparently lining up to get a shufty at the Voorwerp through the Hubble Telescope, which is currently awaiting repair by a Space Shuttle crew.

Via Sargasso (Dutch). I re-coloured the original photo, because people pointed out that the blob is more likely to be green than blue. CP/IMH: “The chances of anything coming from Mars / Are a million to one, he said / The chances of anythiiiing coming from Mars / Are a million to one … and still, they come.”

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August 6, 2008

Jan Akkerman concert on laddermill power

Filed under: Aviation,Music,Science by Branko Collin @ 9:05 am

Dutch guitar giant Jan Akkerman, former astrounaut Wubbo Ockels and Delft University all worked together to come up with this tiny concert in the Stadspark of Groningen last year. The reason? The electrical power was delivered by a prototype of a so-called Laddermill, an invention by Wubbo Ockels that is currently being developed at the University of Delft, and that consists of a chain of kite-wings that act as kites when going up, and as wings when going down.

Laddermills should be able to deliver from kilowatts to megawatts of power, enough to provide neighbourhoods and cities with electricity. According to the Guardian, laddermills are especially useful in The Netherlands, Denmark, the UK and Ireland “thanks to the high-speed jet stream.”

If you’ve never heard of Akkerman before, check YouTube for “focus hocus pocus.”

Via Engadget. See also this TU Delft page.

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August 1, 2008

RFID tags used to monitor hikers’ health

Filed under: Health,Science by Branko Collin @ 8:26 am

Researchers from the Radboud University in Nijmegen used RFID tags during the recent Four Day Marches to experiment with health monitoring. Volunteers were asked to swallow an RFID pill which sent the hiker’s body temperature to a receiver in their back pack every 10 seconds. The receiver would then relay that information via Bluetooth to a GPS-enabled mobile phone which in turn would forward the data to the operations centre at the university’s teaching hospital.

Using the data, the researchers could track the walkers on Google Maps, and even alert nearby walkers should a volunteer be in trouble. Radboud University was in the news earlier this year when researchers cracked and cloned London’s Oyster travel card and the Dutch public transportation card, which both used NXP’s Mifare RFID chip.

Via Engadget. Photo by Maurits Vink, published using a Creative Commons license.

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July 30, 2008

‘Hidden’ Van Gogh painting uncovered

Filed under: Art,History,Science by Orangemaster @ 3:10 pm

Van Gogh

A new technique allows pictures which were later painted over to be revealed once more. An international research team, including members from Delft University of Technology and the University of Antwerp, has successfully applied this technique for the first time to the painting entitled ‘Patch of Grass’ by Vincent van Gogh. Behind this painting is a portrait of a woman.

It is well-known that Van Gogh often painted over his older works. Experts estimate that about one third of his early paintings conceal other compositions under them. A new technique, based on synchrotron radiation induced X-ray fluorescence spectroscopy, reveals this type of hidden painting. The techniques usually used to reveal concealed layers of paintings, such as conventional X-ray radiography, have their limitations. Together with experts from the Deutsches Elektronen-Synchrotron in Hamburg and the Kröller-Müller Museum, TU Delft materials expert and art historian Dr Joris Dik, and University of Antwerp chemistry professor Koen Janssens therefore chose to adopt a different approach. The painting is subjected to an X-ray bundle from a synchrotron radiation source, and the fluorescence of the layers of paint is measured. This technique has the major advantage that the measured fluorescence is specific to each chemical element. Each type of atom (e.g. lead or mercury) and also individual paint pigments can therefore be charted individually. The benefit of using synchrotron radiation is that the upper layers of paint distort the measurements to a lesser degree. Moreover, the speed of measurement is high, which allows relatively large areas to be visualised.

(Link and photo: eurekalert.org)

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July 19, 2008

Why people buy the wrong house

Filed under: Architecture,Science by Branko Collin @ 2:53 pm

Earlier this year researchers from the Radboud University in Nijmegen published a paper that explored why people make wrong decisions when choices are complex, for example when buying a house or choosing a vacation. According to the authors, we over-think things. For instance, when we buy a house, we might attach a higher weight to a large room (“grandmother can sleep there when she stays over”) than to a long commute. The longer we think about this, the more scenarios we think up of what we might use the room for, adding more weight to that choice.

But the real-life importance of the room does not increase with all the uses we can imagine—it’s still going to be used a few days on average each year—whereas the long commute will become a royal drag after a while.

Another problem of over-thinking is that it tends to exaggerate framing effects. Framing is what you do when you look at choices from a certain angle. The choice for a large house can be viewed in terms of space, but also in terms of energy costs. It turns out that different frames lead to different choices, and that more framing leads to wrong choices.

The scientists suggest that if you want to make a complex decision, you still weigh all the factors, but then sleep on it for a while, until the decision just—poof—pops into your head.

(Via The Frontal Cortex. Photo by Doratagold, distributed under a Creative Commons Attribution-Share Alike 2.0 Generic license)

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July 17, 2008

Climate change twice as fast in the Netherlands

Filed under: General,Science by Orangemaster @ 8:20 am
Nijntje

The climate change in the Netherlands is happening twice as fast as compared to the rest of the world, according to television’s RTL Nieuws on Wednesday based on two yet to be published studies. Cees Molenaars of the KNMI (Royal Dutch Meteorological Institute) confirmed the news. “One of the parts of the report regards the warming up of all of Western Europe, which is twice as fast as elsewehere”, says Molenaars. He also says that there is no reason to panic on the short term. However, winters will be milder and there will be more precipitation.

More precipitation in the Netherlands is usually a euphemism for more rain and hail rather than snow. Ick.

(Link: ad.nl)

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June 20, 2008

Teenager shoots off water rockets in Delft

Filed under: Science by Orangemaster @ 11:27 am

Today at 4 pm, 13-year-old Boyan Slat from Delft will shoot off 102 water rockets at the sports pitch of his school, the Grotius College in Delft in an attempt to break some records. Slat built the launch system all by himself. Since 2005, he has been experimenting with rockets, using natural raw marerials like baking powder and vinegar. He calls his system the Bazooooka Mk6. The address of this spectacular show with music and special effects is Juniusstraat 8 in Delft and is free.

If someone scores some pictures, let us now!

The smart kid also has his own website: wetenschapvoordummies (Science for dummies). Here it says 101 water rockets.

Somehow, I expect him to attend the Delft University of Technology later on.

(Link and photo: ad.nl)

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June 19, 2008

Dutch talk faster than Flemish

Filed under: Science by Branko Collin @ 7:55 am

A Flemish study which showed that the Dutch talk faster than their Southern neighbours was shot down rapidly by Dutch experts when it was first published in 2004. But four years later linguist Hugo Quené from the University of Utrecht has proved his Flemish colleagues right. Quené used new methods to pick apart the 38-hour speech corpus and used a recently developed statistical method, multi-level analysis. As it turns out long “phrases” (bits of speech separated by pauses) take relatively less time to pronounce than short ones. Even so, the Dutch tend to use shorter phrases than the Flemish. Also when phrases of the same length were compared, the Dutch proved to be the fast talkers.

Via Blik op Nieuws (Dutch).

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June 2, 2008

Foreign female professor in Nijmegen honoured in the US

Filed under: Science by Orangemaster @ 10:55 am
cutler.jpg

Anne Cutler, professor at the Institute for Cognition and Information at the University of Nijmegen and director of the Max Planck Institute for Psycholinguistics in Nijmegen, has been elected as a member of the National Academy of Sciences in the US, a huge honour bestowed to very few people. To give you an idea, The National Academy of Sciences currently has some 2,000 active members, of which more than 180 are living Nobel Prize winners. Famous past members include Albert Einstein, Robert Oppenheimer, Thomas Edison, Orville Wright and Alexander Graham Bell.

Cultler’s research revolves around how the brain processes spoken language. In 1999 she was the first woman to be awarded the Spinoza Prize, a kind of Dutch Nobel Prize. Back then, Dutch feminists (Opzij magazine) jumped at the occasion to hail women’s achievements only to realise that Ann Culter is Australian. “The most intelligent woman in the Netherlands is Australian,” read the article.

And then most female top managers in the Netherlands are foreigners. Is the hint big enough now?

(Link: ru.nl)

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May 28, 2008

Booties for cows with sore feet

Filed under: Animals,Science by Orangemaster @ 12:29 pm
morecows1.JPG

A veterinarian in Winterswijk, Gelderland has developed slippers for cows with inflamed feet. Ron Jansen made the slippers using foam rubber and velcro. The cows need to wear them for five days, during which the footwear will ease the pain and allow the inflammation to heal quicker by shielding it from manure.

We could not find a picture, but we did find a nice cow photo shoot.

(Link: www.agd.nl)

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