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vgr's profile
Venkatesh Rao
Venkatesh Rao
Venkatesh Rao
@vgr

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Venkatesh Rao

@vgr

Conversational account. For work follow @ribbonfarm, @breaking_smart, @artofgig. Tweets are 90% vacuous views, apathetically held. Mediocritopian. IKEA builder.

Los Angeles, CA
venkateshrao.com
Joined August 2007

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    1. Venkatesh Rao‏ @vgr Sep 8
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      All long-term value is built from the follow-through part of short-term habits. Follow-through as in golf swings not as in delivering on commitments. It’s respecting the momentum of every atomic action that produces natural “extra” effects relative to immediate needs.

      2 replies 6 retweets 83 likes
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    2. Venkatesh Rao‏ @vgr Sep 8
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      Writing up notes after meetings is one of the very few I’ve managed to stick to. Brief cues during, detailed notes after, review before next meeting. Turns a staccato thread of though with lots of rework/redundancy into a smooth stream.

      1 reply 1 retweet 39 likes
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    3. Venkatesh Rao‏ @vgr Sep 8
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      When it works well, clients don’t actually notice. It just looks like I’m on the ball, keeping up with situation and maintaining state. I send them the notes, which they like, but many don’t appreciate this particular effect. It’s only when thread breaks that it’s noticeable.

      1 reply 1 retweet 21 likes
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    4. Venkatesh Rao‏ @vgr Sep 8
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      (Which is rare... I’m occassionally late, but almost never skip) Playing with gears again after a long time, it strikes me that involute gear tooth profiles are all about follow-through and smoothness. https://en.wikipedia.org/wiki/Involute 

      1 reply 2 retweets 11 likes
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      Venkatesh Rao‏ @vgr Sep 8
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      Unlike primitive gears, involute profiles maintain continuous contact between 2 gear tooth faces and allow next tooth to pick up where previous tooth leaves off. That’s why well-designed gears can be very quiet compared to noisy primitive ones.pic.twitter.com/x2tk8kNv2G

      11:07 AM - 8 Sep 2020
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      • Kristof Molnar-Tatai Thomas Lloyd bg ✧ 🎙 Piyush Maverick Tainguriya Customer Support 🎙 François Wirion Very Tired Shop Owner Conor MacSuibne KP S Surya
      3 replies 6 retweets 35 likes
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        2. Venkatesh Rao‏ @vgr Sep 8
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          Huygens described them in his description of the pendulum clock but I suspect they were around before. Their artisan description — unwrapping path of the end of a taut string wrapped around a cylinder — sounds like something that would have been discovered before mathematization

          2 replies 0 retweets 7 likes
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        3. Venkatesh Rao‏ @vgr Sep 8
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          Anyhow, kinda interesting that my new clockmaker activities are leading to new perspectives on consulting habits. Pay attention to follow-through. Develop involute-profile work habits. And golf swings, so play habits too. Let each action smoothly set up the next.

          1 reply 1 retweet 17 likes
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        4. Venkatesh Rao‏ @vgr Sep 8
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          Heh I have my topic for this week’s @artofgig I guess

          1 reply 0 retweets 3 likes
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        5. Venkatesh Rao‏ @vgr Sep 8
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          Unexpected side benefit of this thread is I have now discovered gear nerd twitter 🤣pic.twitter.com/lF608rA3Qw

          1 reply 0 retweets 17 likes
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        6. End of conversation
        1. New conversation
        2. Nick Yuan‏ @Nick_Yawn Sep 8
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          Replying to @vgr

          In practice, you do not want the faces to actually make contact, as they are sliding, will wear, and cascade. Oil at operating temperature* keeps them separate, which is why short miles are worse than long miles. Additionally: quiet is from helical cut:https://www.carthrottle.com/post/the-advantages-and-disadvantages-of-straight-cut-gears/ …

          1 reply 0 retweets 2 likes
        3. Nick Yuan‏ @Nick_Yawn Sep 8
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          Replying to @Nick_Yawn @vgr

          Not that gearboxes are the only application of gears, but, usually, if you can hear them, they are not helical cut, or not lubricated, or failing. I think your analogy still stands.

          0 replies 0 retweets 0 likes
        4. End of conversation
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        2. Nick Parker‏ @NickParkerPrint Sep 8
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          Replying to @vgr

          Fun fact: Involute gears are not the unique solution to this! You're describing the 'fundamental law of gearing' which says the angular velocity of both gears must be constant throughout the mesh. What's special about involutes is they obey it over a range of center distances.

          1 reply 1 retweet 13 likes
        3. Nick Parker‏ @NickParkerPrint Sep 8
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          Replying to @NickParkerPrint @vgr

          Cycloid gears obey the law as well, but only for an exact center distance which is hard to provide in most applications. They're easier to make though, so they're used a lot in watchmaking https://en.wikipedia.org/wiki/Cycloid_gear …

          1 reply 1 retweet 6 likes
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