Apollo 11 – Movie

May 24th, 2019 No comments

Back in March, I told you about the Apollo 11 movie (see http://blog.dankohn.info/?p=4078) that has never before seen HD footage. Well it starts playing in Memphis TN at the Pink Palace on May 25th. See https://www.memphismuseums.org/cti-giant-theater/show-schedule/ for show times.

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May 15th, 2019 No comments

I usually do not get political on my blog, but I have see an anti-science tendency in the USA and it is getting worse……. I think this says it all:

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Pi Mini Laptop that We Want

May 15th, 2019 No comments

A friend sent me a link to Hackaday’s article “This is the Raspberry Pi Mini Laptop that We Want” and it made me miss my old HP 200LX Palmtop. Take a look side by side:

The one on the left is the Pi and the one on the right is the HP.

Funny what is old is new again!

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Masters of procrastinators

April 19th, 2019 No comments

My department chair suggested this video for all students and I totally agree….

Tim Urban: Inside the mind of a master procrastinator

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Check out this TED Talk

April 17th, 2019 No comments

I watched this TED Talk and thought you would find it interesting.

Christoph Keplinger: The artificial muscles that will power robots of the future:

Learn more about watching TED Talks on all of your favorite platforms: https://www.ted.com/about/programs-initiatives/ted-talks/ways-to-get-ted-talks

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High school robotics students build power wheelchair for 2-year-old

April 16th, 2019 No comments
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Is There a Mismatch Between Career-Tech Ed and Good Jobs?

April 16th, 2019 No comments
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Study maps ‘extensive Russian GPS spoofing’

April 16th, 2019 No comments

This is really really scary. This BBC report states that Russians are using strong radio [GPS] signals to drown out reliable navigation data.


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Inside Google’s Rebooted Robotics Program

April 16th, 2019 No comments
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First Picture of Black Hole

April 12th, 2019 No comments
The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capture images of a black hole. In coordinated press conferences across the globe, EHT researchers revealed that they succeeded, unveiling the first direct visual evidence of the supermassive black hole in the centre of Messier 87 and its shadow. The shadow of a black hole seen here is the closest we can come to an image of the black hole itself, a completely dark object from which light cannot escape. The black hole’s boundary — the event horizon from which the EHT takes its name — is around 2.5 times smaller than the shadow it casts and measures just under 40 billion km across. While this may sound large, this ring is only about 40 microarcseconds across — equivalent to measuring the length of a credit card on the surface of the Moon. Although the telescopes making up the EHT are not physically connected, they are able to synchronize their recorded data with atomic clocks — hydrogen masers — which precisely time their observations. These observations were collected at a wavelength of 1.3 mm during a 2017 global campaign. Each telescope of the EHT produced enormous amounts of data – roughly 350 terabytes per day – which was stored on high-performance helium-filled hard drives. These data were flown to highly specialised supercomputers — known as correlators — at the Max Planck Institute for Radio Astronomy and MIT Haystack Observatory to be combined. They were then painstakingly converted into an image using novel computational tools developed by the collaboration.

And here is a TED video on how it was done…..

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