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As Built

Harry O'Hanley
Platform
Substack
PricingOnly free issuesPublishesTwice weekly
Issues7SubscribersRead asbuilt.pub

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Latest Issues

Recent posts by this newsletter. Browse the email archive.

Nuclear 02: How to Harness Fission

At 1:23:40 AM on April 26, 1986, operators at Chernobyl's Reactor 4 pressed the AZ-5 button, initiating an emergency SCRAM to shut down the unit. At the time, the reactor had been operating at about 200 MW, well below its nominal operating ...

3 months ago
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The Anvil Rule

Anvil Cloud Formation

3 months ago
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Spiral Development for Hardware Programs

We've been given the opportunity to design a clean sheet hardware system. It's a rare and exciting moment — a chance to create something from nothing, and bring it all the way to mission-ready. The path ahead is uncharted and uncertain. Som...

3 months ago
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Black Holes

Black holes are so dense that not even light can escape. Look directly at them and you won't see a thing. This makes them difficult to study. How can you understand something that cannot be seen?

3 months ago
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Authors

The writers behind this newsletter.

  • Harry O'Hanley
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