Dave Pentecost2014-06-29 02:41:36
Luna Moth Couple

Right now there are 3 luna moths on the windows. Dating hot spot.
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  • Dave Pentecost2014-04-14 19:03:35
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    Cool.

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    Looping stop motion of a 3D printed bear...climbing stairs
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  • Dave Pentecost2014-05-09 20:58:42
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    Via +Ciro Villa 

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    96% of our Universe is made of energy and matter we know very little about. However, take a look at this infographic to learn a bit about what we do know.
    Larger version: http://chandra.si.edu/resources/illustrations/infographics.html

    Related Links: 
    http://chandra.si.edu/resources/flash/univ_pie.html
    http://chandra.si.edu/xray_astro/dark_matter/
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  • Dave Pentecost2014-05-23 14:55:29
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    Mars Panorama - NASA’s Curiosity Mars Rover selfie: Martian night
    (Digital Art Compilation)
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  • Dave Pentecost2014-05-24 14:57:11
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    Via +Cory DeVore

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    #ikea
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  • Dave Pentecost2014-06-30 02:30:08
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    The right tool for the job.

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    .
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  • Dave Pentecost2014-04-28 18:24:23
    Airstream - Recording/Mixing Desk

    Just installed. 
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  • Dave Pentecost2014-07-09 22:22:52
    Airstream clamshell interior coming together
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  • Dave Pentecost2014-07-12 20:17:12
    Moby and the Power Girls - Airstream

    Girls Club novio Moby dropped by today and saw the building for the first time (he's been in LA). Here he is at the Airstream studio with the Power Girls - Lyn, Jenny, Jen and Dharma.
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  • Dave Pentecost2014-04-14 04:40:36
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    Ephemeralization - Doing more with less - Buckminster Fuller 
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  • Dave Pentecost2014-05-24 23:46:26
    Echo Lake Trilliums, 2014

    First weekend this year at the shack in the Adirondacks. No frozen pipes to repair. Made it through another winter.
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  • Dave Pentecost2014-04-14 14:40:19
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    Bonus: exports to png, obj and VRML2.

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    Check out Anselm Levskaya's program called polyHédronisme, which lets you draw strange and beautiful polyhedra on your web browser!

    http://levskaya.github.io/polyhedronisme/

    You start with a Platonic  solid and then do things to it.  I got this one by typing "aaaaD", which starts with a dodecahedron and then does "ambo" 4 times.  If you want to figure out what "ambo" means, try "D", then "aD", then "aaD".

    Thanks to +William Rutiser for pointing this out! 
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  • Dave Pentecost2014-06-10 04:06:41
    This morning in the Adirondacks

    A moment passing. The bugs are already starting to eat the bunchberry flowers. But still a fresh June sight.
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  • Dave Pentecost2014-07-03 15:44:03
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    Via +Allison Sekuler 

    ATT: +Mickey Pentecost 

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    An incredible new paper sculpture by artist Rogan Brown who hand cuts microbes and pathogens from paper. This latest piece, 'Outbreak,' represents over four months of work. See much more on Colossal... you don't even need a microscope.

    http://www.thisiscolossal.com/2014/07/outbreak-hand-cut-paper-microbes-by-rogan-brown/
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  • Dave Pentecost2014-05-28 21:19:42
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    Takes me back. I bailed out of drumming just as the machines came in. But I'm ready to try again.

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    Interesting tool: Man vs Machine: "In Search of the Click Track"

    Type the name of an artist and a track to see a tempo map of said tune and see if you've been listening to a human or a machine.

    Below are tempo maps of Stewart Copeland playing "So Lonely" by the Police vs Britney Spears' "I love Rock and Roll."

    http://labs.echonest.com/click/
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  • Dave Pentecost2014-05-30 22:26:10
    Reskinning the Airstream Studio interior

    There is a method that seems to be working. The trick is to put a layer of sound transparent fabric behind the perforated aluminum sheet, between the metal and the cotton absorbent isolation panels in the wall cavity. Then pop rivet the metal to the square tube purlins attached to the original vertical ribs of the '58 Airstream.

    Result - a metal interior that does not echo, since the perforations make it transparent to sound. Durable but decent acoustics. Additional sound treatment if needed.

    View looking at the right side of the speaker bridge and one of the panels in place.

    ATT: +Jaime Martorano 
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  • Dave Pentecost2014-06-07 00:38:15
    Pink Lady's Slipper

    Rising from a carpet of bunchberry flowers. Last light of day. Quick snap as the clouds of mosquitos found me. 

    Echo Lake, Adirondacks, New York State.
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  • Dave Pentecost2014-06-18 23:15:38
    Airstream Studio - Speaker Bridge Takes Shape

    Center speaker housing was crunched in transit and little plastic latches damaged. We'll either get replacements from the company or 3D print them. AC grill will go over the center speaker. Fabric over acoustic panels is Amethyst from Guilford of Maine.

    ATT: +Ted Ewen 
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  • Dave Pentecost2014-06-10 19:50:07
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    This is your brain on Rock n Roll.

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    In the 1950's, Russians bootlegged banned music by pressing discs made of discarded X-rays salvaged from hospitals.

    http://criminalwisdom.tumblr.com/post/88395846850/bone-music-before-the-availability-of-the-tape
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  • Dave Pentecost2014-05-15 00:15:38
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    Funny catastrophe illustrations camouflaged as dainty, porcelain plates. #art   #calamityware  

    See more: http://www.mymodernmet.com/profiles/blogs/don-moyer-calamityware
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  • Dave Pentecost2014-07-18 11:25:39
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    Discovery Of 'Electric Bacteria' Hints At The Potential For Alien Life

    "Microbiologists have learned that certain strains of bacteria are capable of using energy in its purest form by eating and breathing electrons. It's a discovery that demonstrates an entirely new mode of life on Earth — and possibly beyond."
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  • Dave Pentecost2014-05-06 18:07:41
    Blackmagic into Unity game engine for virtual movie theater

    There's a package on the Unity asset store to bring a live camera feed into Unity but it is Windows only.

    https://www.assetstore.unity3d.com/#/content/3683

    But there is a Blackmagic device to Syphon program I ran across.

    http://vdmx.vidvox.net/blog/black-syphon

    It seems to have potential for my OS X setup - a Unity "stage set" with a screen (see screenshot - based on the Robot Lab set), in fisheye in the dome, to turn the dome into a flat screen theater. Using Syphon on a texture I should be able to send any HDMI signal (live or from a Quicktime movie) to the virtual screen. Yes, I know you can play a video clip on a texture in Unity - but you have to import it into the project. Would rather not do that.

    Wish me luck.
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  • Dave Pentecost2014-05-23 02:38:36
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    What forms (and what doesn't form) these intriguing ridges on Mars? SETI Institute Scientist Lori Fenton explains: http://buff.ly/1knpimk
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  • Dave Pentecost2014-05-03 21:03:21
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    What do you get when you combine a box of sand with a Microsoft Kinect, an overhead projector, and a series of illuminated pucks? The hypnotic grooves of the Sand Noise Device (SND). Check out the video, read our interview for more info, and come play with the SND at Maker Faire Bay Area on May 17 + 18: http://makezine.com/2014/05/02/the-hypnotic-grooves-of-the-sand-noise-device/
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  • Dave Pentecost2014-05-05 16:17:23
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    Via +Ciro Villa 
    ATT: +Carter Emmart 

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    Russian Lunar Lander Prototype Rediscovered | Part-Time Scientists
    "An incredible piece of Apollo time space legacy has been rediscovered in a Russian hangar! It's the equivalent of the NASA Apollo program's lunar landing module." 

    "From a historical and technical advancement point of view it's actually sad that Russia stopped it's efforts on sending people to the moon after the Apollo program turned out to be a success."

    Lunniy Kabina  "lunar cabin" for a single cosmonaut.

    Credit: Part-Time Scientists
    Part-Time Scientists Website: http://ptscientists.com
    Part-Time Scientists Facebook Page:
    https://www.facebook.com/PartTimeScientists

    +Part-Time Scientists 
    +Roscosmos (Unofficial) 
    +Johnson Space Center 
    +NASA Goddard 
    +NASA's Marshall Center 

    #Space   #Russia   #Moon   #Lunar   #Lander #Soviet #LK #Spacecraft   #Cosmonaut   #Zond #Roscosmos #Apollo #NASA #ЛК #Россия
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  • Dave Pentecost2014-06-26 02:09:42
    Photogrammetry test, with Photoscan

    Stone stairway at Blue Mountain Center, Adirondacks, New York state. 3D model created with 60 photos.

    Inspired by this article:
    http://www.theastronauts.com/2014/03/visual-revolution-vanishing-ethan-carter/
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  • Dave Pentecost2014-07-17 20:55:44
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    This animated short by filmmaker Nina Paley, creator of the acclaimed "Sita Sings the Blues", presents a concise and bloody recap of how a tiny strip of land in the Middle East changed hands over thousands of years.

    More about her work here: http://blog.ninapaley.com/
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  • Dave Pentecost2014-07-16 02:40:46
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    Reddish Bands on Europa: This colorized image of Jupiter's moon Europa is a product of clear-filter grayscale data from one orbit of our Galileo spacecraft, combined with lower-resolution color data taken on a different orbit. The blue-white terrains indicate relatively pure water ice, whereas the reddish areas contain water ice mixed with hydrated salts, potentially magnesium sulfate or sulfuric acid. The reddish material is associated with the broad band in the center of the image, as well as some of the narrower bands, ridges, and disrupted chaos-type features. It is possible that these surface features may have communicated with a global subsurface ocean layer during or after their formation.

    Image Credit: NASA/JPL-Caltech/SETI Institute

    #nasa #europa #jupiter #solarsystem #moon #space #science
    
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  • Dave Pentecost2014-06-07 12:36:44
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    Glimpse of the future.

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  • Dave Pentecost2014-06-12 16:04:50
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  • Dave Pentecost2014-04-19 16:22:55
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    Sharing is Caring

    +Laura Gibbs 

    And +Erin Testman, would you please pass this along to +Matt Cruea?  He might like this.
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  • Dave Pentecost2014-07-14 04:15:32
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    Via +Deven Matlick

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    "Orion: Head to Toes" by Rogelio Bernal Andreo
    Spanning nearly 25 degrees, this 32 pane mosaic vista stretches across the well-known constellation of Orion, from head (top) to toe (bottom). Captured with a Takahashi FSQ telescope and STL11000 camera in October 2010

    Credit: Rogelio Bernal Andreo
    Rogelio's website: www.deepskycolors.com
    +Rogelio Bernal Andreo 

    #Space #Astronomy #Nebula #Orion #Belt #M42 #Night #Sky #Astrophotography #Art #Science #Panorama #Mosaic
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  • Dave Pentecost2014-05-17 03:49:04
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    Via +Tom Eigelsbach

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    Spira Mirabilis

    This was the name – “marvelous spiral” – that Jacob Bernoulli gave to the logarithmic spiral.

    In the logarithmic spiral, the distance from the center increases exponentially as the angle sweeps out the curve. One of its characteristics that Bernoulli discovered is shown at the bottom left. When any line drawn from the center intercepts the curve, the interception angle is always the same.

    Logarithmic spirals occur often in nature. Besides the nautilus shell at the bottom right, it is also seen in the bands of hurricanes, and in the shape of the arms of spiral galaxies.

    Bernoulli was so fond of Spira Mirabilis that he ordered that one be engraved on his tombstone.

    #mathematics #bernoulli
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  • Dave Pentecost2014-05-04 01:54:21
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    Could Jupiter's moon Ganymede harbor a 'club sandwich' of oceans and ice?

    According to new NASA-funded research, Ganymede (the largest moon in our solar system) might have ice and oceans stacked up in several layers. Read more here: http://buff.ly/1lEAMlW
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  • Dave Pentecost2014-07-01 17:17:21
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    Via +Olivio Sarikas 

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    This Suspended Tent Lets You Sleep In The Trees (11 pics):

    www.boredpanda.com/suspended-treehouse-tent-tentsile-alex-shirley-smith/

    #treehouse #tent #camping #outdoors #nature #travel  
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  • Dave Pentecost2014-07-06 19:09:37
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    I think I want one!
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  • Dave Pentecost2014-06-29 14:11:56
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    Galaxy Cove Vista Revisited
    Image Credit & Copyright: Rogelio Bernal Andreo (Deep Sky Colors)
    http://apod.nasa.gov/apod/ap140629.html

    To see a vista like this takes patience, hiking, and a camera. Patience was needed in searching out just the right place and waiting for just the right time. A short hike was needed to reach this rugged perch above a secluded cove in Julia Pfeiffer Burns State Park in California, USA. And a camera was needed for the long exposure required to bring out the faint light from stars and nebulae in the background Milky Way galaxy. Moonlight illuminated the hidden beach and inlet behind nearby trees in the above composite image taken last month. Usually obscured McWay Falls is visible just below the image center, while the Pacific Ocean is in view to its right. The above image is a high-resolution sequel to a similar image that appeared last year.
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  • Dave Pentecost2014-06-10 21:17:31
    Airstream Clamshell

    Re-skinning the interior of the Airstream recording studio. You can see the fabric over the absorbing materials, in a new curved clamshell frame on the inside where the live room will be. Over this will go wedges of perforated aluminum as in the rest of the trailer interior. New half-inch glass windows have replaced old ones, to keep isolation while maintaining some of the original look and views of outside.

    1958 Overlander - built the year NASA was created, one year after Sputnik.
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  • Dave Pentecost2014-06-10 14:58:11
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    This would look good in the dome - light on dark for the most part.

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    Fremont Street Experience  Las Vegas
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  • Dave Pentecost2014-06-07 15:37:37
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    Via +Ted Ewen 

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    Amazing Kid Taps On Washers and Dryers: http://youtu.be/z70C2dDsL14
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  • Dave Pentecost2014-05-03 17:01:57
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    This is the {6,3,6} honeycomb, as drawn by +Roice Nelson.  It's also called the order 6 hexagonal tiling honeycomb. The reason is that has a lot of sheets of regular hexagons, and 6 sheets meet along each edge of the honeycomb. 

    I've already showed you honeycombs where 3, 4, or 5 sheets of hexagons meet along each edge.  They all live in hyperbolic space, and you can see them all starting here:

    http://blogs.ams.org/visualinsight/2014/05/01/636-honeycomb

    But now we've reached the end!   You can do 6, but you can't build a honeycomb in hyperbolic space with 7 sheets of hexagons meeting at each edge. 

    Puzzle: what do you get if you try?

    I don't know, but it's related to this:

    • You can build a tetrahedron where 3 triangles meet at each corner.  For this reason, the tetrahedron is also called {3,3}.  You can build a hyperbolic honeycomb where the edges coming out of any vertex go out to the corners of a tetrahedron... and these edges form hexagons.  This is the {6,3,3} honeycomb.

    • You can build an octahedron where 4 triangles meet at each corner. The octahedron is called {3,4}.  You can build a hyperbolic honeycomb where the edges coming out of any vertex go out to the corners of an octahedron... and these edges form hexagons.  This is the {6,3,4} honeycomb.

    • You can build an icosahedron where 5 triangles meet at each corner.  The icosahedron is also called {3,5}.  You can build a hyperbolic honeycomb where the edges coming out of any vertex go out to the corners of an icosahedron... and these edges form hexagons.  This is the {6,3,5} honeycomb.

    • You can build a tiling of a flat plane where 6 triangles meet at each corner.  This triangular tiling is also called {3,6}.  You can build a hyperbolic honeycomb where the edges coming out of any vertex go out to the corners of a triangular tiling... and these edges form hexagons.  This is the {6,3,6} honeycomb.

    The last one is a bit weird!   The triangular tiling has infinitely many corners, so in the picture here, there are infinitely many edges coming out of each vertex.   For other weird properties of the {6,3,6} honeycomb, read my blog article.

    But what happens when we get to {6,3,7}?
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  • Dave Pentecost2014-06-14 01:38:12
    Only Apple

    Disclosure: I've been an Apple chauvinist since 1979, when I wrote Steve Jobs and asked to borrow an Apple II to show to video artists in New York. I got a letter back from his assistant, saying Steve wanted her to send the computer. She did.

    35 years later, Apple is the real deal. +John Gruber is one of the best and fairest of Apple-leaning commentators, and this is some of his best analysis. 
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  • Dave Pentecost2014-07-12 16:30:31
    Airstream Clamshell Complete

    The live room end of the Airstream recording studio. Missing - metal trim, ceiling diffuser, bench upholstery, etc. 

    But this was a struggle for the team. I think it was worth it.
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  • Dave Pentecost2014-06-20 14:46:28
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    #WeekendProjects  powered by +RadioShack: Connect to the "Raspberry Eye" Servo Cam from anywhere in the world and remotely maneuver the direction of the camera. It's fun to build and operate. Follow our detailed step-by-step instructions & customize the project however you want: http://m8k.me/1ifEGmN
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  • Dave Pentecost2014-06-09 21:40:51
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    How to Photograph the Night Sky, Even in Light-Polluted Skies: A Tutorial from Justin Ng

    We feature A LOT of astrophotos here on Universe Today, and we get many comments about them, too — with some people saying they could NEVER take photos of the night sky because they live in cities, or are too close to street or yard lights or other causes of light pollution.


    Read more: http://www.universetoday.com/112448/how-to-photograph-the-night-sky-even-in-light-polluted-skies-a-tutorial-from-justin-ng/#ixzz34AtEEltc
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  • Dave Pentecost2014-05-22 20:18:32
    Unity Display of Audio Spectrum

    I'm collecting resources for a series of classes on the science of sound, and I know we will want to end up with an audio reactive Unity project we can project in the dome along with live music performance.

    Here's a start. I'll try to keep adding things as I find them.

    Another Youtube demo (with link to forum post which has code)
    Unity3D - Audio Spectrum (with source code)
    Unity3D - Audio Spectrum (with source code)

    Spectrum Analyzer with project files
    http://forum.unity3d.com/threads/160975-Spectrum-Analyzer-wirh-Unity

    Using mic input
    http://www.kaappine.fi/tutorials/using-microphone-input-in-unity3d/

    http://www.41post.com/4776/programming/unity-making-a-simple-audio-visualization

    Controlling Game elements with SOund
    http://re-sounding.com/2013/12/14/unity-controlling-game-elements-with-sound/
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  • Dave Pentecost2014-04-24 22:23:51
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    There are worse ways to go.
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  • Dave Pentecost2014-04-17 03:45:17
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    The Opportunity rover and the Lunar Reconnaissance Orbiter are both zeroed out in NASA's 2015 budget. Learn why these missions face the axe and why the White House is forcing NASA to choose between existing missions and starting new ones.

    More here: http://bit.ly/1iqhj74

    (Image: Olaf Frohn)
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  • Dave Pentecost2014-04-16 22:07:18
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    Att: +Carter Emmart 

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    Look closely! Our Curiosity Mars rover and its tracks are visible in this view from orbit, acquired on April 11 by the High Resolution Imaging Science Experiment (HiRISE) camera on our Mars Reconnaissance Orbiter. The rover is near the largest butte in the lower left quadrant of the image, at about a two o'clock position relative to the butte. It appears bright blue in the exaggerated color of this image. Curiosity entered the area included in this image on March 12, along the tracks visible near the upper left corner.

    The multi-layered location filling much of the left half of this image is called "the Kimberley." Curiosity's science team chose it, based on other HiRISE images, as a potential gold mine for the rover mission. Black gold, that is, as organic material that, if found at the Kimberley could be a biomarker (sign of past life) -- the holy grail of Mars exploration.

    Image credit: NASA/JPL-Caltech/Univ. of Arizona

    #mars #marscuriosity #msl #hirise #uarizona #planets #space #nasa #science
    
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  • Dave Pentecost2014-06-28 16:34:01
    Sacandaga Sunset

    For the dome. I have a darker version in case of crossbounce. Last night at Camp Fowler.
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  • Dave Pentecost2014-06-27 17:06:29
    SETI - The Fermi Paradox

    Great essay on why we have had no evidence of intelligent extraterrestrial life. Some of it is familiar territory but it pulls together ideas that I had not considered also. Via +John Gruber 

    And another one via Gruber: http://praxtime.com/2013/11/25/sagan-syndrome-pay-heed-to-biologists-about-et/
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  • Dave Pentecost2014-06-29 14:08:03
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    A look and sound...Djangobotic foot tapper.

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    A look "inspired by Parisian paleo-punks of the 1940's"
    And a sound that combines the best of modern and swing.

    I'm listening to Caravan Palace's eponymous first release.  Electro Swing only came to my attention a year or so ago but I do love it. I can see learning some swing drumming soon.

    Last Fm has this to say about Caravan Palace:
    Paris, France (2005 – present) It all started with a double bass player, a guitarist and a violinist; all highly talented musicians who are really into swing, Django addicts who enjoy tinkering with electro. Their project swayed a singer, a clarinettist, a trombonist who doubles up on percussion and a guitarist who also acts as DJ. With their “Zazou” look (inspired by Parisian paleo-punks from the 1940s), they serve up festive, frantic music, an improbable futuristic and melodious Charleston fit for the dance floor.

    Inspired by Parisian paleo-punks is a phrase that makes my brain happy in it's own right.

    Caravan Palace - Suzy
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  • Dave Pentecost2014-06-26 02:37:55
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    An animation demonstrating the movements of stars at the center of the Milky Way.

    The best evidence of a supermassive black hole at the center of our galaxy.

    (source: http://www.contriving.net/link/fq)
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  • Dave Pentecost2014-06-24 13:54:17
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    Thanks, Don!

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    Wonderfully Odd
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  • Dave Pentecost2014-06-18 23:18:22
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    Beautiful image of Tycho Central Peak by the Lunar Reconnaissance Orbiter. Happy 5th LRO!
    #space   #planetary  
    www.nasa.gov/content/lunar-reconnaissance-orbiters-view-of-tycho-central-peak/  
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  • Dave Pentecost2014-06-07 17:43:02
    Two more pink lady's slippers

    Of five I've found so far in our tiny lot.
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  • Dave Pentecost2014-06-06 19:59:37
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    Amazing New X-Ray Image of the Whirlpool Galaxy Shows it is Dotted with Black Holes.

    Within the image there are 450 X-ray points of light, 10 of which are likely X-ray binaries. The Whilpool galaxy is thought to have so many X-ray binaries because it’s in the process of colliding with a smaller companion galaxy. This interaction triggers waves of star formation, creating new stars at a rate seven times faster than the Milky Way and supernova deaths at a rate 10-100 times faster. The more-massive stars simply race through their evolution in a few million years and collapse to form neutron stars or black holes quickly. Read more: http://buff.ly/1kuJGne
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  • Dave Pentecost2014-05-25 00:12:52
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    Yes.

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    Looking for a really good read? Check out this free e-book by Douglas A. Vakoch, Director of SETI Institute Interstellar Message Composition.

    This fascinating e-book explores the possibility of human/extraterrestrial communication. Check out the recommendation NPR gave the book, here: http://buff.ly/1gruWoa

    Access the book here: http://buff.ly/1gruYfV
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  • Dave Pentecost2014-05-24 23:14:52
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    This is the Cat's Eye Nebula, snapped by Hubble. Cat's Eye Nebula was one of the first planetary nebulae discovered - and has one of the most complex forms known to this kind of nebula, featuring eleven rings (or shells) of gas.

    (Credit: NASA, ESA, HEIC, and The Hubble Heritage Team (STScI/AURA)

    Learn more: http://buff.ly/RYFm3q
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  • Dave Pentecost2014-05-15 04:02:15
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    Via +Vicky Gallardo

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    "Viewing from above allows us to see the world as a living, breathing organism displaying its stunning and surreal beauty." —Andre Ermolaev

    Read more of 'Iceland from Above' here: http://buff.ly/1hzpOZW
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  • Dave Pentecost2014-06-13 22:34:45
    Mat + Barrier + Soil + Sedum

    = extensive green roof.

    Last major project in the building (I hope) is the green roof. Most of it will have standing planters but over the planetarium there will be a sedum meadow. Roofers are done, deliveries made, team ready.

    (yes that's a canoe by the sedum - it will be a planter)
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  • Dave Pentecost2014-07-09 04:18:09
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    Stunning breakthrough in simple manufacture of carbon nanosheets for solar panels and other applications

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  • Dave Pentecost2014-06-27 04:59:58
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    Bob Berkebile continues his creepy experiments (his word) with Structure Sensor. The itSeez3D app looks like a must have.

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  • Dave Pentecost2014-06-18 20:13:39
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    Skidi Pawnee Star Chart, Field Museum of Natural History in Chicago
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  • Dave Pentecost2014-06-09 21:32:58
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    Att: +Carter Emmart

    Have not looked at this yet - will check it out later.

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    Solar System available now in Unity asset store:

    https://www.assetstore.unity3d.com/#/content/16139 - Asset Store
    http://solarsystem.abdeveloper.com/web.html - Interactive demo
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  • Dave Pentecost2014-05-20 16:48:07
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    On May 20, 1964, American radio astronomers Robert Wilson and Arno Penzias discovered the cosmic microwave background radiation (CMB), the ancient light that began saturating the universe 380,000 years after its creation. 
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  • Dave Pentecost2014-05-08 13:43:48
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    Overgrown

    Frank Relle is taking pictures of New Orleans nightscapes, and this is my favorite. 

    "It's only at night that I feel the true atmosphere and mood of the city," explains Relle.  "I decided to do this project at night to eliminate all the distractions I felt during the day.  At night, things slow down, which allows me to pay closer attention to all the things I wouldn't notice during the day."

    All of Relle's nightscapes are made with a 6x7 camera using daylight color negative film.  Relle keeps external light sources inh is photographs to an absolute minimum, preferring instead to use long exposures and high-pressure sodium and mercury vapor light.  With the latter, he 'paints' or highlights additional details and ambience to his images.

    "By being able to control the light and the elements of exposure, I am able to work on location in much the same way that I would work in the darkroom," Relle explains.  He will spend upwards of four hours to create a single image, often after making repeated visits and taking preliminary photographs to resolve the technical and creative issues necessary to create the final image.

    You can see more of his photos here:

    http://www.frankrelle.com/

    The quote is taken from this article:

    http://74.220.219.112/~frankrel/press/presspdf/press150dpi/Color_Magazine_spotlight.pdf

    But what I want to know is: where is this house?  What is its story? 

    #NewOrleans  
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  • Dave Pentecost2014-04-27 19:48:31
    Dome Shakeout - Erin and Paul movie

    Image sequence from all the photos I took.
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  • Dave Pentecost2014-04-16 05:34:41
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    Another good rundown.

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    What are you? Where did you come from?

    99% of the mass of the human body is six basic elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. The remaining 1% is trace elements like the fluorine in your teeth, or the minerals used for cellular and electrical functions.

    You are ~57% water (not two-thirds or 70% as you sometimes might hear). Water is hydrogen and oxygen but since hydrogen is very light the breakdown by mass turns out to be: 65% oxygen. 18% carbon. 10% hydrogen. 3% nitrogen. 1.5% calcium. 1% phosphorus. And everything else being significantly less than 1%. Females on average carry a fair amount less water than males by percentage with a roughly 10% difference. 

    All the elements in your body from helium to iron were created by fusion in stars. For the elements in your body heavier than iron like copper, lead, tin, zinc and even weird sounding ones like lanthanum it required the extraordinary power of a supernova. Believe it or not even huge stars don't have the power to fuse iron so things have to go boom. These elements in your body then are well over 4.6 billion years old (when our sun formed).

    So that's by mass but there's another way we can look at our composition, by counting the atoms. In an average 70kg adult body there are about 3 x 10^27 atoms. That's three octillion (some estimates are higher).

    Because some atoms are smaller than others the percentages flip a bit when we do it this way. By atomic count you are mostly hydrogen at ~62% followed by oxygen which is now down the list at 24%. Then it's 12% carbon and only 1.1% nitrogen. So 99.1% of your atoms are contained in just those four elements.

    As we know these basic elements beyond hydrogen were created by the fusion of hydrogen in stars and subsequent supernovas. But where did all the hydrogen come from? Well, we need to go back to the big bang. 

    In the first moments of the big bang it was too hot for any matter to form. If it did it would be immediately smashed apart again. The universe had to cool a bit from what was known as the "quark-gluon plasma" before protons and neutrons could actually form. That cooling was actually driven by the expansion of the universe and it only took about 10 minutes for anti-matter to be almost entirely wiped out and the hydrogen (and some helium and other trace elements) to form from those primordial protons and neutrons (in a really complicated process). So the majority of the atoms in your body are 14.8 billion years old.
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  • Dave Pentecost2014-07-02 15:32:13
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    50 hours to end of the Kickstarter campaign. I just ran across it today.

    +Paul Bourke +Clayton Hooker what do you think of this? 

    360X300 degrees but looks like a price and feature breakthrough to me.

    Reshared text:
    pano photo from NYC using the 360cam from Giroptic. Check it out on Kickstarter at http://360.tv/ks
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  • Dave Pentecost2014-06-04 03:58:57
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    Eno live!  With a beard!  Playing a really weird instrument!

    Brian Eno never plays live anymore.  But on May 5th he came out with Someday World, an album with Karl Hyde... and on June 27th they're putting out another album, called High Life... so they're clearly on a roll, and I guess that's why they recently gave a live performance of this song, 'Daddy's Car', from the first album.

    Can you figure out what instrument Eno is playing?  It looks like a modern version of the theremin, where you make sounds by wiggling your hand... but I can't hear it.  I can hear him singing, though.

    You can hear the studio version of this song here:

    https://soundcloud.com/warp-records/eno-hyde-daddys-car

    It has much punchier bass.  But the rhythm flows more smoothly on the live version... and it has more joy.

    I don't know how much I like Someday World - it is not grabbing me yet.  But Eno is always up to something, so it's probably worth some thought.  In the old days he used a card deck of aphorisms called  'Oblique Strategies' to break out of his habits... but for this album he and Hyde tried to follow these rules:

    “Only Strong Feelings Please”
     “Avoid Music”
    “In Life Nothing Happens Twice”
    “Ruthless Square Energy”
    “Build Cities on Hills”

    The last one is a bit cryptic, but Eno explained it thus:

    “A lot of the nicer cities I know are cities built on hills, and the cities are beautiful because the buildings have a challenge to adapt to. They have to mould themselves around the geology that they've formed upon. And that always makes for very interesting buildings, because they can't just be blocks, they have to somehow morph around the environment. A lot of the constructions on the album were deliberately irregular and awkward.”
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  • Dave Pentecost2014-07-08 21:48:49
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    Via +Mike Milton 

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    ... and here's Roger playing some blues slide guitar on the LinnStrument
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  • Dave Pentecost2014-06-07 01:40:52
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    Well that's a nice upbeat perspective. We are (among) the first prototypes. The old ones aren't just ignoring us.

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  • Dave Pentecost2014-07-21 21:03:33
    Pleiades Sisters - in the dome

    And in the fisheye. Still working on the lighting. These are the girls who have been working on the dome show and science of sound for the last 2 weeks. #girlsclub
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  • Dave Pentecost2014-06-28 03:16:17
    Luna Moth of the Summer

    We seem to get one or two a year. This one was batting the screens last night, but may have done its mating duty and is resting now. Will probably still be there in the morning. Great end to our big camp week - 70 girls and staff in the nearby summer camp.
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  • Dave Pentecost2014-06-23 15:09:43
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    Via +Brad Snowder 

    I tell part of this story every time I do my dome show these days.

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    The day they heard the Big Bang
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  • Dave Pentecost2014-06-20 17:15:54
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    It was a fun night with Dubspot crew and all camp supporters.

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    Dubspot family representing at the LES Girls Club benefit! We had a great time DJing and part of the money raised goes to sending little girls to Dubspot DJ Camp! All Girls on Deck!  Wonderful night! Please note the sculpture behind is is made of paper plates!!!!! 
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  • Dave Pentecost2014-06-17 16:00:46
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    Black Canyon Campground, Willamette National Forest
    Near Oakridge, Oregon

    My latest  #photosphere .  Click on it to step inside and look up (especially up!), down and all around.
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  • Dave Pentecost2014-05-26 19:40:05
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    Battle of the Bands

    When light passes through gas and dust in the interstellar medium, some of the light is absorbed. Since the gas and dust only absorb certain wavelengths or colors of light, by by looking at these absorption bands we can determine the type of material that makes up the interstellar media.  Well, most of the time. It turns out there are a range of absorption bands that we haven’t been able to identify. They are known as diffuse interstellar bands.

    One of the difficulties with these diffuse interstellar bands is that they don’t seem to match any known atoms or molecules. We know there are molecules that could form within the interstellar medium, but many of them haven’t been analyzed in the labs. Analyzing the line spectra of different compounds in a range of conditions such as vacuum and low temperatures is time consuming. Since it isn’t very glamorous, it doesn’t tend to get much funding, and that limits our ability to analyze the bands.

    Another challenge is that different bands can be stronger or weaker relative to each other. This means they are likely due to a range of processes.  There is some evidence that the strength of the bands correlates with the amount of dust in the region, so they are likely related to some kind of dust feature.  Right now one of the favored ideas is that they are due to some kind of larger hydrocarbon molecule. But as for the details, we just don’t know.

    Image: NASA/P. Jenniskens and F.-X. Desert
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  • Dave Pentecost2014-05-25 16:55:38
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  • Dave Pentecost2014-04-23 21:52:51
    Outside my office window

    Spring! And a flowering tree to hide the construction site across the street.
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  • Dave Pentecost2014-04-14 14:09:16
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    Do you want to get your model moving in Unity? Read this run through to learn all about importing, animating and controlling your character as a player!
    http://blogs.unity3d.com/?p=15123
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  • Dave Pentecost2014-04-13 14:56:28
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    Nearly every day, I have to say something intelligent about all this in my dome talks. Brian is a huge help.

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    Money for Nothing

    Although there is a great deal of evidence for the big bang, it does raise an interesting question.  If the universe began with the big bang, what caused the big bang? That’s a bit of a stumper, because we aren’t entirely sure.  Observationally, we have a good understanding of the universe as far back as nucleosynthesis, which occurred when the universe was about 10 seconds old.  We also have some initial observational evidence of the inflationary period, which occurred in the earliest moments of the universe.    As for the cause of the universe, we just have ideas at this point.  One of the more popular ones is that the universe quite literally came from nothing.

    The “nothing” in this case is not the type of nothing we might typically imagine. Here, “nothing” refers to the idea that there are no particles, energy, space, or anything else that could be considered “real” in a traditional sense.  Instead there is only a quantum potential, or a nebulous cosmic wavefunction.  You might argue that a quantum state subject to some set of physical laws is hardly “nothing”, and I’d be inclined to agree with you, but in cosmology the term “nothing” has kind of stuck.  It’s similar to the term “big bang” being used for an event that was neither big nor explosive.

    That said, there has been some interesting theoretical work on just what this quantum nothing might have been like.  One such work was recently published in Physical Review D. In this paper the authors looked at what is known as the Wheeler-DeWitt equation, which is a way to describe the entire universe within the framework of quantum mechanics.  The model is not without its problems, but it is a way to study the intersection between general relativity (gravity) and quantum theory.

    Within the Wheeler-DeWitt formalism, it is possible for quantum fluctuations to occur.  Basically, within the quantum nothing fluctuations of spacetime can appear, though they would dissolve back into the quantum-ness. The team showed that in certain cases it is possible for such a fluctuation to expand rapidly, where the state of the quantum system acts as a cosmological constant to cause inflation.  Once that occurs, the fluctuation is to big to dissolve back into a quantum state, and has thus become “real”.  What this shows is that it is possible for a quantum state to give rise to a universe with an early inflationary period, similar to the way our universe seemed to arise.

    It should be kept in mind that this is still very speculative.  This work is really a demonstration of a possibility, and not confirmation of how our universe came to be.  We are only beginning to gather evidence on the inflationary period of the big bang, and we’ll need a solid understanding of that period before we can explore any quantum origin of the Cosmos.

    In the end, these ideas might prove successful, or it may turn out that nothing comes of it.

    Paper: Dongshan He, Dongfeng Gao, and Qing-yu Cai. Spontaneous creation of the universe from nothing.  Phys. Rev. D 89, 083510 (2014)
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  • Dave Pentecost2014-05-19 04:45:55
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    Contacting intelligent life in the Universe. According to me.
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  • Dave Pentecost2014-04-18 16:54:20
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    Amazing. Can I have another lifetime as an artist?

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  • Dave Pentecost2014-05-19 04:38:08
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    Missed this when +Henry Segerman first posted. Time to pull out the 3D printers.

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    +Jessica Rosenkrantz and +Jesse Louis-Rosenberg of Nervous System have released their new system for designing flexible, hinged 3d printed clothing and jewellery.
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  • Dave Pentecost2014-04-30 17:51:15
    Unity 5 Preview

    Via +Kostiantyn Dvornik 
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  • Dave Pentecost2014-04-25 19:53:22
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    Fascinating.

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  • Dave Pentecost2014-04-16 04:58:48
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    Wonderful.

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    "N is for Nebula, what forms when stars die,
    this recycled fuel makes cosmic apple pie."

    From A for Aurora to Z for Zenith, it's the alphabet as you've never seen it before!
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  • Dave Pentecost2014-04-15 14:22:48
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    The NASA Voyager Golden Record Cover Diagram
    The information in the upper right-hand portion of the cover is designed to show how pictures are to be constructed from the recorded signals. The top drawing shows the typical signal that occurs at the start of a picture. The picture is made from this signal, which traces the picture as a series of vertical lines, similar to analog television (in which the picture is a series of horizontal lines). Picture lines 1, 2 and 3 are noted in binary numbers, and the duration of one of the "picture lines," about 8 milliseconds, is noted. The drawing immediately below shows how these lines are to be drawn vertically, with staggered "interlace" to give the correct picture rendition. Immediately below this is a drawing of an entire picture raster, showing that there are 512 vertical lines in a complete picture. Immediately below this is a replica of the first picture on the record to permit the recipients to verify that they are decoding the signals correctly. A circle was used in this picture to ensure that the recipients use the correct ratio of horizontal to vertical height in picture reconstruction. Color images were represented by three images in sequence, one each for red, green, and blue components of the image. A color image of the spectrum of the sun was included for calibration purposes.

    The drawing in the lower left-hand corner of the cover is the pulsar map previously sent as part of the plaques on NASA's Pioneer 10 and 11 spacecraft. It shows the location of the solar system with respect to 14 pulsars, whose precise periods are given. The drawing containing two circles in the lower right-hand corner is a drawing of the hydrogen atom in its two lowest states, with a connecting line and digit 1 to indicate that the time interval associated with the transition from one state to the other is to be used as the fundamental time scale, both for the time given on the cover and in the decoded pictures.

    The NASA Voyager Golden Record: The Sounds of Earth
    A montage of sights and sounds etched into a phonograph record—a 12-inch gold-plated copper disk—launched into space on NASA's Voyager probes in 1977 for their interstellar journeys. The discs carry photos of the Earth and its lifeforms, a range of scientific information, spoken greetings from the people (e.g. the Secretary-General of the United Nations and the President of the United States, and the children of the Planet Earth) and a medley, "Sounds of Earth", that includes the sounds of whales, a baby crying, waves breaking on a shore, and a collection of music, including works by Mozart, Blind Willie Johnson, Chuck Berry's "Johnny B. Goode", Valya Balkanska and other Eastern and Western classics and performers worldwide.

    Sounds of Earth:
    http://voyager.jpl.nasa.gov/spacecraft/sounds.html
    Greetings to the Universe in 55 Different Languages: http://voyager.jpl.nasa.gov/spacecraft/greetings.html
    Music From Earth:
    http://voyager.jpl.nasa.gov/spacecraft/music.html
    Scenes From Earth: http://voyager.jpl.nasa.gov/spacecraft/scenes.html

    The record is constructed of gold-plated copper. The record's cover is aluminum and electroplated upon it is an ultra-pure sample of the isotope uranium-238. Uranium-238 has a half-life of 4.468 billion years. It is possible (e.g. via mass-spectrometry) that a civilization that encounters the record will be able to use the ratio of remaining uranium to daughter elements to determine the age of the record.

    The records also had the inscription "To the makers of music – all worlds, all times" hand-etched on its surface. The inscription was located in the "takeout grooves", an area of the record between the label and playable surface. Since this was not in the original specifications, the record was initially rejected, to be replaced with a blank disc. Sagan later convinced the administrator to include the record as is.

    The collection of images includes many photographs and diagrams both in black and white and color. The first images are of scientific interest, showing mathematical and physical quantities, the Solar System and its planets, DNA, and human anatomy and reproduction. Care was taken to include not only pictures of humanity, but also some of animals, insects, plants and landscapes.

    Images of humanity depict a broad range of cultures. These images show food, architecture, and humans in portraits as well as going about their day-to-day lives. Many pictures are annotated with one or more indications of scales of time, size, or mass. Some images contain indications of chemical composition. All measures used on the pictures are defined in the first few images using physical references that are likely to be consistent anywhere in the universe.

    The Voyager spacecraft are not heading towards any particular star, but Voyager 1 will be within 1.6 light-years of the star Gliese 445, currently in the constellation Camelopardalis, in about 40,000 years.

    As the probes are extremely small compared to the vastness of interstellar space, the probability of a space-faring civilization encountering them is very small, especially since the probes will eventually stop emitting electromagnetic radiation meant for communication.

    Carl Sagan noted that "The spacecraft will be encountered and the record played only if there are advanced space-faring civilizations in interstellar space. But the launching of this 'bottle' into the cosmic 'ocean' says something very hopeful about life on this planet." Thus the record is best seen as a time capsule or a symbolic statement more than a serious attempt to communicate with extraterrestrial life.
     
    The content of the records were selected for NASA by a committee chaired by Carl Sagan of Cornell University, et. al. Dr. Sagan and his associates assembled 115 images and a variety of natural sounds, such as those made by surf, wind and thunder, birds, whales, and other animals. To this they added musical selections from different cultures and eras, and spoken greetings from Earth-people in fifty-five languages, and printed messages from U.S. President Carter and U.N. Secretary General Waldheim.

    Each record is encased in a protective aluminum jacket, together with a cartridge and a needle. Instructions, in symbolic language, explain the origin of the spacecraft and indicate how the record is to be played. The 115 images are encoded in analog form. The remainder of the record is in audio, designed to be played at 16-2/3 revolutions per minute. It contains the spoken greetings, beginning with Akkadian, which was spoken in Sumer about six thousand years ago, and ending with Wu, a modern Chinese dialect. Following the section on the sounds of Earth, there is an eclectic 90-minute selection of music, including both Eastern and Western classics and a variety of ethnic music.

    VOYAGER 1 DISTANCE FROM EARTH
    18,999,016,746+ KM
    127.00058268 AU
    DISTANCE FROM THE SUN
    19,073,308,066+ KM
    127.49718948 AU
    ROUNDTRIP LIGHT TIME FROM THE SUN
    35:12:27
    (hh:mm:ss)

    VOYAGER 2 DISTANCE FROM EARTH
    15,635,615,556+ KM
    104.51763440 AU
    DISTANCE FROM THE SUN
    15,641,404,063+ KM
    104.55632818 AU
    ROUNDTRIP LIGHT TIME FROM THE SUN
    28:58:29 
    (hh:mm:ss)

    Credit: NASA-JPL, Wikipedia

    +NASA Jet Propulsion Laboratory +Wikipedia 
    +STEM on Google+ Community +Teaching STEM 
    +Science on Google+ 

    #NASA   #Voyager   #Space   #Earth   #CarlSagan   #AnnDruyan #GoldenRecord  #Diagram #Explanation  #Sounds   #Music   #Scenes   #Humanity   #Culture #JPL   #Cosmos   #Universe
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  • Dave Pentecost2014-07-12 17:26:41
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    NASA spacecraft observes further evidence of dry ice gullies on Mars.

    Repeated high-resolution observations made by NASA's Mars Reconnaissance Orbiter (MRO) indicate the gullies on Mars' surface are primarily formed by the seasonal freezing of carbon dioxide, not liquid water. The first reports of formative gullies on Mars in 2000 generated excitement and headlines because they suggested the presence of liquid water on the Red Planet, the eroding action of which forms gullies here on Earth. Mars has water vapor and plenty of frozen water, but the presence of liquid water on the neighboring planet, a necessity for all known life, has not been confirmed. Learn more here: http://buff.ly/1m1mFn1
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  • Dave Pentecost2014-07-05 03:23:19
    Live Drum triggers in VDMX

    Via +David Lublin 
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  • Dave Pentecost2014-07-05 00:56:54
    Cabin of inspiration

    Can't say the last two weeks have been peaceful - 70 girls and staff at camp 10 minutes away, house guests, assorted dramas - but I had hours to focus on new skills. Now back to the dome in the city, with another cabin break later in the summer.
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  • Dave Pentecost2014-07-02 19:00:36
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    Link to free impulse response files.

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    Ever wanted to hear how your drums would sound in the actual Batcave? How about a synth line played in the middle of an ancient cathedral? Using #Live9's Convolution Reverb, you can apply the sounds of real spaces, vintage hardware, and more to any audio material.

    Click through to learn more from Ableton sound designers about creating your own impulse responses, and check out some free online collections of IRs: https://www.ableton.com/en/blog/convolution-reverb-impulse-responses/
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  • Dave Pentecost2014-07-01 20:52:51
    More Photogrammetry

    Using Photoscan again. 3D model from 100 photos, rock in the woods near our driveway. Nice to have time to let the computer crunch it.
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  • Dave Pentecost2014-06-29 18:37:02
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  • Dave Pentecost2014-06-29 15:11:24
    Counter-Gamification

    Via +Laura Gibbs 

    From this collection of essays: http://gamification-research.org/2014/06/edited-volume-rethinking-gamification-out/
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  • Dave Pentecost2014-06-22 03:12:54
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    Converting a DICOM image stack (CT/MRT) to a 3D mesh (.STL) for 3D printing
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  • Dave Pentecost2014-06-17 15:57:29
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    Ha!

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  • Dave Pentecost2014-06-16 16:56:32
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    Hmmm...

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    THE BEATLES GET BACK TO MONO

    THE ORIGINAL MONO STUDIO ALBUMS REMASTERED AT ABBEY ROAD DIRECTLY FROM THE ANALOGUE MASTERS FOR VINYL RELEASE

    The Beatles in mono: This is how most listeners first heard the group in the 1960s, when mono was the predominant audio format. Up until 1968, each Beatles album was given a unique mono and stereo mix, but the group always regarded the mono as primary. On September 8 (September 9 in North America), The Beatles’ nine U.K. albums, the American-compiled Magical Mystery Tour, and the Mono Masters collection of non-album tracks will be released in mono on 180-gram vinyl LPs with faithfully replicated artwork. Newly mastered from the analogue master tapes, each album will be available both individually and within a lavish, limited 14-LP boxed edition, The Beatles In Mono, which also includes a 108-page hardbound book. 

    - Records cut without using any digital technology using detailed transfer notes made by the original cutting engineers
    - a rigorously tested Studer A80 machine was used to play back the precious tapes, the new vinyl was cut on a 1980s-era VMS80 lathe
    - Manufactured for the world at Optimal Media in Germany
    - 12-inch by 12-inch hardbound book features new essays and a detailed history of the mastering process by award-winning radio producer and author Kevin Howlett
    - Illustrated with many rare studio photos of The Beatles, fascinating archive documents, and articles and advertisements sourced from 1960s publications
    - Available individually and collected in a limited 14-LP boxed edition

    YOUR NEAREST RETAILER: http://gnikn.us/1y8GuSW

    BEATLES STORE EUROPE: http://gnikn.us/1lrEScV
    BEATLES STORE USA: http://gnikn.us/1y8UMmE
    BEATLES STORE JAPAN: http://bit.ly/KyZ0ea
    BEATLES STORE BRAZIL: http://gnikn.us/15mXLuC
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