nyankosensei

I think this is what you’re referring to: https://microsoft.github.io/OpticSim.jl/dev/

It was made out of paper sheets printed by the “Great Stella” software available elsewhere on the same site:

https://www.software3d.com/Stella.php

Figure 9C in the paper shows testing in a wooded area. Figure 9F shows transmitted data collected in a residential building, so not a test chamber.

Thanks for sharing. Very interesting, especially since it’s based on Koka, which I’ve been experimenting with and still trying to wrap my head around. It also reminds me a lot of Shen (https://shenlanguage.org/). I’ll definitely try this out.

How do you pronounce the name?

There are many feasibility and safety issues associated with the Reflect Orbital plan. It doesn’t make as much sense as you might think. For instance, the satellites can only illuminate areas a relatively short time after local sunset. The Sun reflection could potentially damage an amateur astronomer’s eye if one of the satellites crosses their telescope’s field of view: https://bigthink.com/starts-with-a-bang/true-cost-solar-powe...

See https://news.ycombinator.com/item?id=48433410 for context.

The OP includes a link to an English excerpt written by the author of the "Swing, divide and conquer the factorial" manuscript:

http://www.luschny.de/math/factorial/SwingIntro.pdf

I noticed from the logo that 2026 is evidently the 75th anniversary of the Lincoln Laboratory.

I second this recommendation. For those interested, this is “An interactive application for maths and graphics based on the Lua programming language and the GNU Scientific Library.” for both Windows and Linux. I installed it and keep a shortcut on my Windows desktop for quick calculations.

https://github.com/franko/gsl-shell

I appreciate your offer, but there’s no need. I subsequently found a copy here:

https://softwarepreservation.computerhistory.org/LISP/book/A...

Maybe I’m missing something, but that webpage only seems to provide a PDF containing the beginning of the book (up through the Preface). Perhaps you need a ACM Digital Library Premium subscription to access the entire book?

It’s great that Libbrecht put a copy of his 500+ page ‘Snow Crystals’ book on arXiv [0] before an updated version was published by Princeton University Press [1].

[0] https://arxiv.org/abs/1910.06389 [1] https://press.princeton.edu/books/ebook/9780691223629/snow-c...

I completely agree that this is a great resource. BTW, the Springer site book link is https://link.springer.com/book/10.1007/978-3-642-14764-7. I’m thankful that the author has made the book and code freely available.

The author also co-authored a book about historical and state-of-the-art pi computations called Pi Unleashed (https://link.springer.com/book/10.1007/978-3-642-56735-3). The code and additional resources are available at https://extras.springer.com/?query=978-3-642-56735-3. Though somewhat dated (circa 2000), there’s a lot of fascinating information in the 229 Mb zip download, including a 133 char C program (pitiny.c) that computes 15000 digits of pi.

You can still access Usenet posts:

https://www.big-8.org/wiki/Web-to-news_gateways

I don’t know what the best book would be, but I found this extract from Andy Farnell’s book “Designing Sound” to be a very helpful introduction to Pure Data:

http://aspress.co.uk/ds/pdf/pd_intro.pdf

Another useful book is “Loadbang - ProgrammingElectronic Music in Pd” by Johannes Kreidler. The 2nd edition is evidently out of print, but a free download is available here:

https://www.wolke-verlag.de/musikbuecher/johannes-kreidler-l...

Another introduction from an historical point of view is “Galois Theory for Beginners: A Historical Perspective” by Jörg Bewersdorff

https://bookstore.ams.org/view?ProductCode=STML/95

You can click the tiny printer icon above the title to display the entire article as a single page.

She has also developed KamilaLisp with many APL-derived features:

https://github.com/kspalaiologos/kamilalisp

The developers have written a terrific open source book that walks the reader through creating a Spacewar! game in Cuis Smalltalk (just updated yesterday):

https://github.com/Cuis-Smalltalk/TheCuisBook

Here’s a link to the referenced article: https://www.nature.com/articles/s41467-023-41693-w

The Society for Amateur Radio Astronomy lists some other interesting projects for beginners:

https://radio-astronomy.org/getting-started

This is the NPR full site with better photos showing how well-preserved the wreck is:

https://www.npr.org/2023/09/04/1197480909/shipwreck-trinidad...

I found the Guided Tour very helpful for getting started with Factor:

https://docs.factorcode.org/content/article-tour.html

It's also available for browsing in the Factor browser with code that can be clicked to execute directly in the Factor listener, making it easy to follow along.

I just learned that several mathematical notations exist for Braille:

https://chezdom.net/mathematicalbraillecodes/

As far as I can tell, this technique relies on post-processing of data from the separated detectors, so it isn’t a realtime system.

NOTE: The linked article does not include a correction from the original press release. The “40F” cooling ability should be only “about 7F”.

https://www.acs.org/pressroom/newsreleases/2023/march/colorf...

Chargaff’s interesting autobiography is available from the publisher as a free ebook: https://books.rupress.org/catalog/book/heraclitean-fire

The Cuis developers are working on a great introductory book that I’m working through: https://cuis-smalltalk.github.io/TheCuisBook/

The main webpage provides more info about the Unicon language:

http://www.unicon.org/