Mike Petersen

It’s not like I’m thrilled with Amazon, but I’m so un-thrilled by a reliance on cars, and I like riding my bicycle!

via @NYTOpinion, more terminal car brain content. It is the parked cars that are the problem (and definitely not the cyclists who inexplicably get blamed at the end of the piece). nytimes.com/2023/08/17/opi…

Credit where credit is due, Paris has now adjusted the traffic flow on a long stretch of Rue de Rivoli: full bicycle lanes in both directions, and only a single traffic lane. More of this, please!

To highlight one inaccauracy in the article as an example: Rue de Rivoli, described as a "multilane highway for cyclists", has plenty of non-taxi cars drive on it, as is obvious in the images and videos in the article!

nytimes.com/2021/10/02/wor… "Probably the biggest challenge, though, is that Paris doesn’t yet have an ingrained cycling culture." Strongly disagree. This article pretends like motorised vehicles don't exist and it's just a battle between cyclists and pedestrians.

Dernière photo de la série : Place de la Concorde (8e arrondissement)

Vue de Paris (depuis Meudon), plus mon vélo à un arrêt d'espresso

Photos de mon vélo à Paris, une série occasionnelle. D'abord, la Tour Eiffel (7eme arrondissement):

No Paris bicycle adventure picture this month, because I'm working in NYC -- I did find my ideal breakfast and contemplation spot, though. One collaboration paper submitted (arxiv.org/abs/2205.01688), more in progress!

This paper had a rather winding path to publication, but it is out now. Sincere thanks to everyone who listened to me try to work out the kinks over the past couple of years. The code release is coming -- but I'm happy to talk early access, just contact me!

In contrast, both tree methods and direct methods will produce high variance, with bias tied to sample density. The upside is that tree and direct methods give you a lot of flexibility in the types of systems you can simulate.

Curious about force accuracy in gravity solvers for galaxy-scale simulations? Check out our newly-published paper laying out the technical side of adaptive basis function expansions: academic.oup.com/mnras/article-…

I contributed an algorithm that we used to define the average direction dark matter particles appear to be coming from, which anyone could use to compare their models to our results: github.com/michael-peters…

Several additional models were left on the editing room floor in pursuit of a concise description of the dynamical effects -- a lot of behind-the-scenes work to distill the results.

Katelin wrote a paper with a very clean analysis of models for the local dark matter distribution and the implications for direct detection experiments!