A new toy!We went on a cycling trip in the Northumberland region of the UK last month. We followed the path of Hadrian’s Wall for four days on the…Jun 24A response icon1Jun 24A response icon1
Street artSome years ago, my wife Teresa and I rented an apartment in Amsterdam. I had spent some time in the city in the 1980s. We traveled there…Jan 18A response icon1Jan 18A response icon1
Thinking about Alzheimer’sI have a marked family history of age-related neurodegenerative disease. Relatives in the two generations above me have suffered from…Nov 19, 2024Nov 19, 2024
How onAppear/onDisappear closures work in iOSThis post is to document some obscure stuff I learned about UIKit in iOS. I spent a bunch of time puzzling this out, and hope to save…May 10, 2024May 10, 2024
Right-truncatable primes in other basesI’ve been playing with an idea in number theory that I came up with a while ago. I called it “steady primes,” but it turns out that it’s…Dec 26, 2023Dec 26, 2023
Decimal digit frequency in steady primesYesterday, I wrote about a number theory project I’ve been playing with — steady primes. I was excited about having found all of the…Dec 20, 2023Dec 20, 2023
Steady primesUpdate: There are two additional posts on this topic. The first is on digit frequency in right-truncatable primes in base 10, and the…Dec 20, 2023A response icon1Dec 20, 2023A response icon1
Cast iron electrolysisA little while ago, Benji was shopping at the Alameda Flea Market and came across a really neat rusty old waffle iron. The piece has a base…Jul 15, 2023Jul 15, 2023
Primetime!My pal Doug made a feature request for the solar metric clock: Add an indicator that tells you when the displayed time is a prime number…Feb 28, 2023A response icon2Feb 28, 2023A response icon2
My solar metric desk clock works!I’ve been working on this project, off and on, for most of a year, now. I’ve finally got the clock I promised myself!Feb 2, 2023Feb 2, 2023
