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Jonas Neergaard-Nielsen
Works at Technical University of Denmark
Attended University of Copenhagen Faculty of Science
Lives in Copenhagen, Denmark
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Jonas Neergaard-Nielsen

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It's exciting times - we are getting closer to learning how quantum mechanics should be interpreted. Or, at least how it should not.

A few years ago, most physicists thought there would be no way of distinguishing different interpretations based on observation, but now there are several theoretical and experimental results which at least indicate that certain interpretations must be ruled out.
A wave of experiments is probing the root of quantum weirdness.
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Good article well writen
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Pixel, RIP
Lars Fosdal originally shared to Chuckleworthy:
 
The story of Pixels
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Cherry blossom tea ceremony.

A beautiful Copenhagen seaside park lined with cherry blossom trees hosts the annual Japanese cultural event, Sakura Festival, this weekend. This year the timing is better than most years - the blossoms are at their peak now and there was a constant, light drizzle of petals in today's breeze.

My wife and her tea friends demonstrate sadō, the way of tea, under the trees.

www.sakurafestival.dk
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Made my morning... :-)
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jack shit.
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The Atlantic's feature on Islamic State's understanding of Islam and how they see their mission and rationalise their brutal rule is very well worth the long read.

What previously seemed to me like pure, irrational madness now at least makes some kind of sense. It doesn't really make them any less scary, though. 
The Islamic State is no mere collection of psychopaths. It is a religious group with carefully considered beliefs, among them that it is a key agent of the coming apocalypse. Here’s what that means for its strategy—and for how to stop it.
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ALL religion is scary.  Every ounce of it.  From the dark depths of ISIS to the seemingly innocent back row of a Methodist church.  Just think of all the death caused by 'my God is better than your God'.  It's ridiculous.  I am sick of it.  Sick of watching it happen.  Sick of hearing it.  Sick of zealotry and bigotry.  Why can't we just be humanity?
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Rob Whitworth is a timelapse god. That's all.

via +PetaPixelhttp://petapixel.com/2015/02/16/flow-motion-time-lapse-dubai-insane/
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Have him in circles
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Truly impressive image processing.
 
Synthetic Time-lapse

There is more magic coming from SIGGRAPH this year (2105) with the help of Google researchers and the University of Washington.

It is now possible to have a system look at millions of photographs, sort for common landmarks and scenes, time sequence pictures in each, computationally adjust the images for viewpoint, and tweak lighting to produce viable flicker-free time-lapse movies.

We introduce an approach for synthesizing time-lapse videos of popular landmarks from large community photo collections. The approach is completely automated and leverages the vast quantity of photos available online. First, we cluster 86 million photos into landmarks and popular viewpoints. Then, we sort the photos by date and warp each photo onto a common viewpoint. Finally, we stabilize the appearance of the sequence to compensate for lighting effects and minimize flicker. Our resulting time-lapses show diverse changes in the world's most popular sites, like glaciers shrinking, skyscrapers being constructed, and waterfalls changing course.

More here: http://goo.gl/GsPxpI

Video (5:04): https://goo.gl/TmVT72

Paper (open) (pdf): http://goo.gl/URvR7i

SIGGRAPH 2015: http://goo.gl/5cyaYo

Image: http://goo.gl/EEQwsV
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"Our possessions are both archival (what we treasure about our pasts) and aspirational (what we hope to accomplish in our future)."
 
Artifacts: Cultivating Delight 
One of my continuing interests has always been what the physical objects which we create and with which we surround ourselves say about us, both as individuals and as a society. 

Who does not walk into someone else's living space and eye the collection of books, or music, or video to help form some opinion of the person who lives there?

Our possessions are both archival (what we treasure about our pasts) and aspirational (what we hope to accomplish in our future). When we feel overwhelmed by our possessions, a need to purge them, it's evidence that we need to move on from some impediment, some shackle to the past or illusory future. 

People tend to foist stuff on us (think spam mail) and we find it hard to say no. Tidying up is the physical first step to regaining our sense of self, to assessing our own true needs and desires.

In writing these little meditations on "what we keep", I came across Marie Kondo and her konmari method for taking control of clutter. Her method is far closer to my own than say, the Puritan-style "Clutterers Anonymous". Cleaning isn't about focusing on what to get rid of, on shaming people to get rid of their stuff. (Apparently so they can buy new stuff and keep the consumerist economy going.) No. No. No. It's about focusing on what to keep, those things that bring us delight.

When I sit here drinking my tea, I consider my cup. And yes, it brings me delight. Because I was quite poor in my youth, I always spent a great deal of time carefully weighing the characteristics of any purchase until finding just the thing that brought that spark of delight. If I didn't find it, I didn't buy it. (For example, I didn't own a couch until my late 30s).

When I look at my tea cup, I also think of the Japanese tea ceremony, which is about truly appreciating (paying attention to) the present moment, the radiance of the ordinary. Every time I look at this cup it makes me happy. I just have to remember to look.
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So ends my long introduction to the linked story which examines the KonMari Method from the perspective of an economist. I think it will be interesting to those of you who prefer a less lyrical explanation.


#whatwekeep   #theradianceoftheordinary  
Is Marie Kondo's how-to book the dismal science in disguise?
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Inge Lehmann, celebrated by today's Google Doodle, was among the early heroines of science. She published her discovery of the Earth's inner core in a paper with possibly(?) the shortest title in academic history: P'.

Like other female scientists of the time, she was an excellent "computer", having also worked as an actuary. Apparently she kept track of all available earthquake information on cardboard cards collected in oatmeal boxes. She was described as a master of a black art for which no amount of computerization is likely to be a complete substitute.

http://www.amnh.org/education/resources/rfl/web/essaybooks/earth/p_lehmann.html
http://en.wikipedia.org/wiki/Inge_Lehmann
Almost eight decades ago, Danish seismologist Inge Lehmann transformed our perception of Earth, by discovering the existence of an inner core.
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I recently read/heard Bill Bryson's A Short History of Nearly Everything. Not without its annoyances, but generally highly entertaining. What struck me is how recently we have learned so many things that we, as you say, take for granted and almost absolute truth now.
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10 unbelievable titles you didn't know could increase the audience for your academic papers

Number 1:
Abstract: We give bounds on the average fidelity achievable by any quantum state estimator, which is arguably the most prominently used figure of merit in quantum state tomography. Moreover, these bounds can be computed online---that is, while the experiment is running. We show numerically that ...
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Ha, fantastic +Matt Stuttle​! :-D 
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I don't know why it took me so long, but now I finally uploaded my PhD thesis to +figshare.
It was always available for download from the University's and my own site, but having one more source can't hurt. And somehow it just looks good to have a DOI attached to it :)
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I have tried couple of times and it did not occur to me to check the help! Thanks for the tip, unfortunately the figures in my thesis are the definition of 'poorly compressed pictures' :).
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An atom interferometer - a reasonably simple tabletop experiment - has been used to test a specific model for dark energy. Cool!
 
New experiment doesn’t see fifth force, rules out class of dark energy models
Sketch of new experiment. Fig 1 from arXiv:1502.03888 Three months ago, I told you about a paper that suggested a new way to look for certain types of dark matter fields, called “chameleon fields” . Chameleon fields can explain the observed accelerated expa...
Sketch of new experiment. Fig 1 from arXiv:1502.03888 Three months ago, I told you about a paper that suggested a new way to look for certain types of dark matter fields, called “chameleon fields”. Chameleon fields can explai...
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Work
Occupation
Quantum optician
Employment
  • Technical University of Denmark
    Post doc, 2011 - present
  • National Institute of Information and Communications Technology, Tokyo
    Post doc, 2008 - 2011
  • Niels Bohr Institute, University of Copenhagen
    PhD student, 2005 - 2008
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Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Copenhagen, Denmark
Previously
Tokyo, Japan - Hundested, Denmark
Story
Tagline
Turning mirrors, for a more efficient life
Introduction
Science, photography, LEGO, making, design, technology, Denmark, Japan and more - my G+ may be as messy as my brain...
Education
  • University of Copenhagen Faculty of Science
    Physics, 1999 - 2005
  • Frederiksværk Gymnasium
    1996 - 1999
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Gender
Male
Other names
Jonas Schou Neergaard-Nielsen
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