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Tzafrir Rehan
Works at AweVid
Attended Technion IIT
Lives in Haifa, Israel
25,602 followers|4,798,826 views
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Tzafrir Rehan

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For those who need to know:

* I will not install PokemonGO
* I will not play PokemonGO
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All fun and games to disown pokemon until everyone comes rushing over for a Pokéball badge on their scanner 
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Hearing the one and only +Paul Adams​ live

You may know him as the inventor of Circles which became Google+

#InsideIntercom
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Maidan Nezalezhnosti, Kiev
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Raanan Avidor (ravidor)'s profile photoVitaliy Chepuk's profile photoTzafrir Rehan's profile photo
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+Vitaliy Chepuk already back home( thought of messaging you but had a very busy schedule
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Is it only me, or...?
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More like a giant shirt button. Or a pig snout.
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It's my birthday!
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Happy Birthday
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Collector's Cadillac, downtown Haifa
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76 monte5
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Watching +Robert Scoble​ present
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Sivan Rehan's profile photoTzafrir Rehan's profile photoMario Eldin's profile photo
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PLEASE FIX YOUR "DoShare" GOOGLE CHROME EXTENSION. THERE ARE PEOPLE DEPENDING ON IT! EVERY TIME WE TRY TO POST SOMETHING, IT FORCES TO "ADD CIRCLE"..... WE GO TO ADD A CIRCLE AND THE CIRCLE DOES NOT SHOW UP. WHICH MEANS WE CANNOT POST ANYTHING OR SCHEDULE ANYTHING. PLEASE HELP! THANK YOU! 
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Tzafrir Rehan

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I asked and it turns out nuclear explosions don't register in #LIGO :(


Hi,
On 6 January 2016 at 10:00:01 UTC+08:30 North Korea set off a nuclear device.
Did this event register in your data in any way?



Dear Tzafrir,

Thanks for your very interesting question.

Indeed, this event (and all events involving rapidly-changing distributions of mass and energy) will produce gravitational waves. However, it is straightforward to calculate that the GWs from this event are many, many, many times weaker than anything LIGO could possibly detect.

However, this event also caused ordinary seismic waves (violent ground motion), which was picked up by seismometers around the world:
http://earthquake.usgs.gov/earthquakes/eventpage/us10004bnm#general_region

Whereas GWs travel at the speed of light (30,000 km/s), seismic waves travel much slower (a few km/s, depending on the type of wave). They probably arrived at our Hanford detector 38 minutes later and our Livingston detector 52 minutes later. However, our seismometers did not register anything significant at that time, and our detectors were not in observing mode at that time.

I hope this helps.

Best,

Alan Weinstein for LOSC
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Hi
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Well played +TIDAL​, well played
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Memories
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Lighthouse memorial
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I got a question why do they have a fence around a cemetery?
People are dyeing to get in....
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Work
Occupation
Software Engineer
Employment
  • AweVid
    CEO, 2014 - present
  • Do Share
    Founder, 2012 - 2014
  • DaPulse
    Software Engineer, 2013 - 2014
  • Google
    Software Engineering Intern, 2008 - 2011
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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
Haifa, Israel
Story
Tagline
Musician, Software Engineer
Introduction
I enjoy writing code, building systems, playing music and singing.

I favor open source software, #Linux, #HTML5, #git and I'm comfortable to some level with any programming language.

I play the guitar and bass, some drums and keyboards, and I sing.

Google+ is the center of my passions.

I created Do Share - the app for sharing on Google+.

Also check out Nuke Comments - a Chrome extension for Google+ I wrote that lets you block spam commenters very easily.

F.A.Qs:

q) Wait, aren't you working at Google?
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Education
  • Technion IIT
    2007 - 2012
Basic Information
Gender
Male
Birthday
January 9
Other names
צפריר ריהן
Horrible service, horrible food. Not fresh. Not tasty.
Public - 2 years ago
reviewed 2 years ago
6 reviews
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