andrew croll

New #harrislab open-source hardware released! Introducing FIEVel: A Fast InExpensive Velocimeter based on an optical mouse sensor. The device can nonintrusively measure pointwise x-y velocities at rates up to 6.4 kHz, all for around $100. @arxiv: arxiv.org/abs/2410.23176

Honor Emmy Noether With the Unit For Momentum - Sign the Petition! chng.it/5P4cYvjK5b via @Change

#DailyMechanician Shelby Hutchens explores fracture in soft solids & physico-chemo-mechanics of solid-fluid composites, often with elegant experiments. A '16 paper studied mechanisms leading to pressure drop in cavitation rheology, as well as means to quantify fracture toughness.

Congratulations to Prof. Lillian Hsiao (@LilianHsiao), 2025 recipient of the Early Career Award for Soft Matter Research!

@itiwari93, @BhamlaLab, I are organizing a focus session on "Topological Complexities in Slender Matter and its Applications" (@ApsDsoft, @APSphysics). We have exciting invited speakers @shucong_li_hhh and Stefan Karpitschka. Submit your abstracts by October 25.

With @Trev_J_Jones, we are organizing a focus session on "Crafted matter" (@ApsDsoft) for @APSphysics March Meeting/Global Physics Summit 2025 -- consider submitting an abstract by October 25!

@OusmanKodio and I are looking forward to a great "Morphing Matter" @ApsDSoft focus session at this year’s @APSphysics meeting. Please consider submitting an abstract by the Oct 25 deadline. We have exciting invited speakers—José Bico and @lsmontal !!

The Naval Research Enterprise Internship Program offers college & graduate students a 10-week, paid summer opportunity to engage in real-world Naval research. 🚀 Launch your #NavalSTEM career with #NREIP! Apply by Nov 1 @ navalsteminterns.us/nreip

Squishy Science Sunday is back! At the APS Global Physics Summit 2025, DSOFT and other units (@ApsDbio @APS_DPOLY, @ApsGsnp, DCOMP, FEd, and FOEP) host a public outreach event with cool science demos and activities for all ages! @APSphysics #soft #squishy engage.aps.org/dsoft/news-eve…

Submit abstracts by Oct 25! @chenchao04 (3M), Hyunki Kim (3M), and I are organizing a focus session on “Mechanics and Polymer Physics of Soft Adhesives (@APS_DPOLY, @ApsDsoft)”, at the 2025 APS March Meeting. Invited speaker features @HyunwooYuk @SanaHeal. aps.org/events/2025/jo…

The Department of Physics at Simon Fraser University (in beautiful and vibrant Vancouver) seeks applications for a tenure-track Assistant Professor position in Experimental Biophysics, encompassing all scales of life from molecules to ecosystems.

With @BhamlaLab, @DaeHyunChoi_, We are organizing a @ApsDsoft @ApsDbio @ApsGsnp focus session, “Elastic Instability in Soft Systems” from elastic instability in living and non-living systems to bio-inspired design. Deadline is Oct 25. Please spread this and join us in California

We will hold a symposium titled Polymer Fracture at the coming Pacifichem 2025. The plan is to have 16 invited talks and as many as 32 contributed talks on the topic or research related to the subject. pacifichem.org/technical-prog… #pacifichem2025 @Pacifichem

Dear friends who write NSF GRFP rec letters, this year rec letters are due BEFORE the applications, so about 10 days earlier than normal on Oct. 11. Please don't let NSF's deadline change on rec letters screw over the applicants in your lives.

@PhysRevLett Way to cut the units off the x axis...

A quantum sensor with a sensitivity in the quectonewton range has probed the Casimir-Polder force in the micrometer range go.aps.org/4db8jBG

@AlexanderRKlotz Well read the whole thing, but these are a very "formula" type of letter in my experience.

What is the current consensus on starting grad school personal statements with something like "As a child, I looked up at the stars..."?

@zhigangsuo Kuttsukigami... pubs.rsc.org/en/content/art…

The art of folding paper is called origami The art of cutting and folding paper is called kirigamy The art of cutting, folding, and gluing paper is called what?

❗️Friends, this is important. I ask for shares and spreading information, especially by my followers from Canada. This can set a precedent. The Russians at War film by Russian director Anastasia Trofimova will be shown in Canada at the Toronto International Film Festival. The movie romanticizes Russian soldiers, the aggressors who commit acts of violence in Ukraine every single day. Showing this movie sends a false and morally wrong message that it is the Russian soldiers who should be pitied. Russians soldiers go to war mostly voluntarily. To them, it is a chance to earn money. Ukrainians go to war because we have no choice, because we are fighting for our very existence. To pretend that experiences of Russian soldiers are on the same scale with Ukrainian suffering is utter cynicism and distortion of reality. It disgustingly diverts attention from the victim to the feelings of an abuser. If people want to know what Russian soldiers are really like, they can watch Intercepted by Oksana Karpovych or 20 Days in Mariupol by Mstyslav Chernov. Narratives are important. Ukraine is fighting for her survival and independence. Russia is fighting for Putin's imperialist ambitions. This is the crucial difference. Please share this post with whomever it might be useful or write your own, tagging @TIFF_NET. Thank you.

Saved 25 boxes of perfectly good scholastic books from a terrible fate (dumpster) and going back tomorrow for another 30+ boxes! If you’re a teacher or child adjacent person in the Pittsburgh area and need FREE childrens books, hit me up!!!

UMass-Amherst has had a profound effect on the development and education of many generations of polymer scientists. Check out our new Special Issue highlighting the work of faculty and alumni as they enter a New Era of Polymer Research! onlinelibrary.wiley.com/toc/26424169/2…