# understood (blogs) — RSS Amplifier Recent posts from the 2 feeds in the RSS Amplifier directory that cover understood. Page: Feed: --- ## [Pippin and My Career in Aerospace](https://josephcarragher.us/pippin-and-my-aerospace-career/) _2026-03-03 · carragher · Joseph Carragher_ Pippin is a 1972 musical recounting the ficticious life of Pippin, son of Charlemagne. It centers on Pippin's search for meaning in life—as the son of the emperor, his life is without struggle and he instead spends his time looking for the ultimate fulfillment in life. The viewer follows Pippin has he aimlessly embarks on romanticized pursuits—that of a warrior, a lover, and a king. In all things,… ## [Path Homotopy in the Context of Fuel Optimal Trajectories](https://josephcarragher.us/path-homotopy-in-the-context-of-fuel-optimal-trajectories/) _2025-07-09 · carragher · Joseph Carragher_ It's not uncommon to see the term "homotopy" used in papers when solving for minimum fuel spacecraft trajectories. While I've used the process before, I've never really understood the theory from which it originates nor what the concept broadly is in any thorough manner. I thus decided to teach myself rudimentary algebraic topology and, in doing so, have notably expanded my understanding of not… ## [State Estimates are Distribution Approximations](https://josephcarragher.us/state-estimates-are-distribution-approximations/) _2025-06-09 · carragher · Joseph Carragher_ I'm writing this because, even after an entire graduate degree, I only recently fully grasped the usage of covariances and states and state estimation filters. Naturally, I understood that covariance was a measure of uncertainty in your state estimate, where the state estimate was the estimate of the state (not sure how else to word that one), but I had a revelation recently when reading a blog… ## [how big is your future?](https://hegdenu.net/posts/how-big-is-your-future/) _2024-10-31 · Unknown · (untitled)_ I am, of course, talking about std::future::Future . There are two ways of creating a Future in Rust, you can define some struct or enum , and then implement the Future trait on it or via Rust's async keyword. Any async block ( async { .. } ) or async function ( async fn foo() { .. } ) returns a future. If you want to learn more about how this works, have a look at my series of posts on how I… ## [kubernetes memory](https://hegdenu.net/posts/kubernetes-memory/) _2024-09-30 · Unknown · (untitled)_ I've been trying to get my head around the memory metrics reported by kubernetes and what the numbers mean. Especially since the gaps caused us problems a while back. (Thanks to Maksym and Chris for explaining!) My issue was that I hadn't entirely understood how page caches get represented in the cAdvisor metrics which you get from kubernetes. This is the best analysis I've found…