I discover the beautiful fluid motion videos from Yahya Modarres-Sadeghi of the Fluid-Structure Interaction Lab at UAmherst:
fluid speckle (by Modarres-Sadeghi, FSI/UAmherst)
These images and videos just show us how much information can be gained from a random signal (the marbled incoming flow) when it is coherent (linear flow) preserve correlation in space and time.
Continue readingHello everyone!
I have a new website to talk more specifically about our work on adaptive optics for coherent beamlines (the DREAM beam project.)
Maria Zurek (left) and I (right) with Jeff Welser (IBM VP of research, center) and the rest of the Berkeley Lab Postdoc Association in October 2019
There isn’t much representation of scientists in popular culture, with a only few movies standing out, such as a “A Beautiful Mind” (on John Nash) or “Good Will Hunting.” There’s been a few more in the biopic genre lately, such as the “Imitation Game” on Alan Turing or “The Theory of Everything” on Stephen Hawking, and soon a movie on Robert Oppenheimer by Chris Nolan.
But the representation of women in science and technology is even less frequent. Things seem to be changing, and during the pandemic there’s been a few biopics on women scientists, to which I want to bring attention to:
(credit: @truffleduster)
We’re almost out of the pandemic, and it seems that a lot of people around me are starting podcasts. Here are three podcasts from friends or looser acquaintances that I found very entertaining. Check them out!
tried and tested
I must confess I did try to start a podcast, inspired by my favorite French show “Remède à la mélancolie” (now reborn as “L’Embellie“) I did two episode, but I quickly realized that would take much more effort than I thought if I wanted to get anywhere…
Among other podcast I listen to regularly: Science en question and Femmes puissantes (both in French, I hope there was an English version of these great shows! French public radio is awesome – see La black liste for excellent soul music and and Si l’Amerique m’etait contée for a history of America)EUV lithography is now part of everything – including the chips in your iPhone 12 and beyond. I don’t know if it’s because of the chip shortage, the $50B investment of the US government in semiconductor manufacturing, or the realization that having a nearly monopolistic market with its biggest player in Taiwan, at the mercy of an invasion, but there’s a lot of press on EUV lithography right now (I’ve been talking about my work on the topic at Berkeley Lab here: SHARP and MET5, and shared some thoughts on Moore’s law here.)
Me at the inaugural Berkeley Lab Slam (2016), talking about EUV lithography
Here’s a few pieces:
In this story, ASML is the quiet powerhouse – they have a de facto monopoly (their stock rose 10x over the last 5 years) and they keep expanding (ASML opens new state-of-the-art R&D facility in Silicon Valley.) There’s been some hardball played here, with the US pressuring the European company not to sell their technology with China (Reuters), as if it made any sense.
Besides, I am stoked to see my former colleagues from the Center for X-Ray Optics receive recognition for their work!I hope we’ll get to develop new techniques with x-rays using diffraction-limited beams to further the advances in semiconductors and microchips – skyrmions, superconductivity, memristors, and so many other cool things!
power spectral density of an EUV coherent beam reflected on a naturally rough surface going through an objective zoneplate with a topological charge of 1
I recently read the amazing book “New Expressions in Origami Art” by Meher McArthur, that I found at the shop Paper Tree in the Japan Town of San Fransisco (it’s one of my favorite shops; they always have stunning origami on display, some for sale, from many origamists featured in the book.)
Every page of the book is a delight, where a modern twists (abstraction, wet folding, tessellation) on origami always bring something very fresh.
One Crease, by Paul Jackson
While reading the book and learning about Goran Konjevod (who seems to be a colleague from Lawrence Livermore National Laboratory), I stumbled on the work of Amanda Ghassaei, who has created the Origami Simulator and many other cool simulation tools producing mesmerizing results.
https://twitter.com/amandaghassaei/status/1352605937077522434 Continue readingI am currently on the island of Saint-Martin, in the French West Indies, about 200 miles away from Puerto Rico, because I couldn’t fly back directly from France, which is still under a Travel Ban order from the US. I have two spend at least two weeks so that I can fly back to Berkeley.
Saint Martin on the map
Walking on beach, it is sad to discover that is littered with sargassum, an invasive algae that barely existed when I was walking my dogs on the beach many years ago. This infestation is quite recent in fact, and somehow started in 2011 (see the excellent piece in The Atlantic by pre-Pulitzer Ed Yong: Why waves of seaweed have been smothering Caribbean beaches.)
Sargassum on Orient Bay, fresh and old (September 2021)
It appears that the bloom may come from the increase in nutrients carried by the Amazon river and making it to the ocean (The great Atlantic Sargassum belt.) Apparently, the problem is becoming more and more acute, and I’ve recently learned that researchers (like my colleagues at Berkeley Lab Lydia Rachbauer) are trying to find enzymes in fish that can actually digest these algae.
Because these algae float in the water, they are effectively a a mix of large floating solar panels, and a potentially a great resource of biofuels, where nothing is needed, since the nutrients are provided for free by farmers from the Amazon river. Apparently, there are companies such as C-combinator who are trying to extract the energy from these algae. I can’t really judge if the economics makes sense (harvesting the algae might be complicated, though they seem very easily visible on satellite images so that might help), but developing adequate techniques for a problem that may blow up seems a good idea. Continue readingI’ve discovered Connected Papers and I think it’s awesome!
https://www.connectedpapers.com/It’s a tool to see the connection between papers, and therefor ideal to get started in a new field or make sure you’re not missing out on some papers when you’re writing a review!
Paper connectivity map made wit Connected Papers
I’m glad to see new tools helping the conduct of science.
Bibliography management is always flaky, even if we have better tools now such as Mendeley, and overall gathering information and getting in touch with specific scientist is still pretty bad (Researchgate is not very good.) There are some interesting aspects to ORCID, though it doesn’t have the adoption levels it should have to be very useful, and AMiner provides interesting information (sorting researchers’ work by fields) but it doesn’t work flawlessly.In times of pandemic, there were no coffee room to distract yourself, exchange ideas with other colleagues or just chat about the state of the world. In a certain sense, Twitter has been the equivalent of a coffee room, and I’ve probably spent more time than I should have on there, but I’ve also learned quite a lot about science – not the natural world in itself, but how it works as an enterprise, some of its limitations (e.g. publishing), some of its problem (e.g., mental health issue, impostor syndrome; systemic discrimination) and also participate to the conversation on how to improve things.
The way you use Twitter is personal; some spend a lot of time but stay in the shadow, some like to share everything they see as they would do on Instagram. For me, I use it as a bookmark for tiny ideas (I often use the Twitter advanced search to find a resource I know I shared at some point), and I try to post something every once in a while, to tell the others I’m here. And more and more I use it to boost some messages (propping up students and announcements), which I can do now that I do have some followers with large reach (@Cal, @UCBerkeley, @BerkeleyLab or @SPIEtweets or influential people.)
Lots of various interests converge in my following
Sometimes I post a tweet that blows up, and I wander in the Twitter Analytics to look at the aftermath. There, you realize that even with a tiny following, you can reach a lot of people (At the present moment I have 450 followers, and 120,000 impressions.)
This was a month with a particularly high number of tweet impressions
The good thing about Twitter is that there’s no filter: anyone can say anything they want, and sometimes you happen to produce something interesting, something that others needed without knowing it was there (that’s the essence of virality.)
This one I showed to my mon
The flip side of course is that you have to be mindful of what you say – what people call cancel culture is often the absence of an editor, or simply time to fine tune their message, to tell them they’re going too far. In the extreme, you get incendiary content that get amplified in weird ways by algorithms that are extremely good at hacking your dopamine pathways (here’s an excellent thread on that topic)
On Twitter, you also get to meet people you wouldn’t otherwise – people that are not in your existing network, but are expert and willing to help (you also realize that a lot of people you admire are on Twitter – or is it just the opposite?)The problem with Facebook is not *just* the loss of your privacy and the fact that it can be used as a totalitarian panopticon. The more worrying issue, in my opinion, is its use of digital information consumption as a psychological control vector. Time for a thread
— François Chollet (@fchollet) March 21, 2018
Something I didn’t expect is that I would meet in real life people I got to know from Twitter, and some who are now lifelong friends. People with who you share affinity with and a common sense of purpose.I do like Twitter, and even though it has some similarities with drugs (I used to smoke cigarettes, and the urge to check Twitter whenever you’re idle is strangely similar), it is much better than most other social media. Somehow, they managed not to grow it too big, and it is still a very civil space from where I learn a lot.