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Robert van Engelen, PhD

@engelen.bsky.social
1.3K followers 801 following 166 posts

Possessed by math and coding since the 80s, vintage tech enthusiast, steam engines fanatic, CEO/CTO of Genivia, Professor of Computer Science and Scientific Computing | NYC | 🇺🇸🇳🇱 | defend democracy | support 🇺🇦 | please be kind to animals🙏

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Reposted by Robert van Engelen, PhD
Retro Computers @retrocomps.bsky.social · 07/10/2026
Rest in peace, Margaret Hamilton.
news.mit.edu
Margaret Hamilton, computing pioneer who led software development for the Apollo program, dies at 90
Margaret H. Hamilton, a profoundly influential computer scientist best known for leading the software engineering team at MIT’s Instrumentation Lab during NASA’s Apollo program, died at age 90.
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Elizabeth Jacobs, PhD @elizabethjacobs.bsky.social · 03/10/2026
Because they are eugenicists. Back in the day when we still had to go to the library to make copies of scientific papers from peer-reviewed journals, I always made a point to grab an issue of an old Eugenics journal and copy a random article as a reminder of the dangers of malicious intent.
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Robert van Engelen, PhD @engelen.bsky.social · 25/09/2026
Looks fake. Camera hasn’t moved and daylight is the same. AI image.
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Mrs. Betty Bowers @mrsbettybowers.bsky.social · 22/09/2026
The United States, which once freed prisoners from Germany's concentration camps, is now siding with the war criminals—and obstructing those who would hold them into account. Shameful—if this administration had any shame.
yacnews.com
US prepares to sanction the ICC, that indicted Russia's Putin and Israel's Netanyahu for war crimes
Trump is preparing sanctions against the International Criminal Court itself, potentially cutting it off from U.S. banking, technology and services. The US has already sanctioned 13 ICC officials and ...
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Reposted by Robert van Engelen, PhD
404 Media @404media.co · 14/09/2026
NEW: EXCLUSIVE: Humans are reading ChatGPT users’ prompts to improve OpenAI’s models, and those chats can include sensitive, personal information, according to leaked internal documents and real prompts seen by 404 Media. @josephcox.bsky.social reports. Scoop here: www.404media.co/inside-proje...
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Merriam-Webster @merriam-webster.com · 09/09/2026
Not to brag, but our product has been foldable since 1828.
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Alt National Park Service @altnps.bsky.social · 05/09/2026
The title really says it all.
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Тsфdiиg @tsoding.bsky.social · 31/08/2026
C++ is probably the most valuable language. It provides lvalues, rvalues, prvalues, xvalues, glvalues...
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Robert van Engelen, PhD @engelen.bsky.social · 03/08/2026
I was in NYC and saw the morgue trucks. Emergency hospital tents in Central Park because ICUs were full. A hospital ship arrived to increase capacity. Streets were empty. Saw from my window emergency personnel in full-body protection suit collect people.
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Robert van Engelen, PhD @engelen.bsky.social · 02/08/2026
💔🤬
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Reposted by Robert van Engelen, PhD
Jason Moore @moorejh.bsky.social · 30/07/2026
lol
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JanetLC @janetlc.bsky.social · 27/07/2026
Experts run the numbers and declare Tesla Cybertruck as the biggest flop in US automotive history, overtaking the Ford Edsel flip.it/tBWzsA
flip.it
Experts run the numbers and declare Tesla Cybertruck as the biggest flop in US automotive history, overtaking the Ford Edsel
The Tesla Cybertruck has been labelled the 'biggest flop in US automotive history', usurping the Ford Edsel - and the numbers are pretty shocking
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Reposted by Robert van Engelen, PhD
Hackaday @hackadayofficial.bsky.social · 19/07/2026
QT6 brings BASIC to the Web Browser, or Your Computer
hackaday.com
QT6 brings BASIC to the Web Browser, or Your Computer
Hackaday Article
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Reposted by Robert van Engelen, PhD
Massimo (mirror) @rainmaker1973-m.bsky.social · 27/06/2026
The NASA climate spiral visualization presents monthly global temperature anomalies, deviations from a long term global average. Original post
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Jason Moore @moorejh.bsky.social · 22/06/2026
Yeah, it kinda stinks
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Robert van Engelen, PhD @engelen.bsky.social · 20/06/2026
Is AI ruining our skills? Early results are in — and they’re not good www.nature.com/articles/d41...
nature.com
Is AI ruining our skills? Early results are in — and they’re not good
Reliance on artificial-intelligence tools degrades the abilities of physicians and software engineers, studies show.
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Reposted by Robert van Engelen, PhD
Corey Rayburn Yung @coreyryung.bsky.social · 16/06/2026
I hate Windows so much. It's PATH environment variables never work properly. But, today, I discovered a new form of bullshit. By default, typing "python" at the command prompt would open the Microsoft Store to a python installer rather than running python b/c a program alias setting.
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Nina Willburger @drnwillburger.bsky.social · 04/05/2026
#MayThe4th Happy Star Wars Day – May the Force be with you! ✨ Looking for a real-life galaxy far, far away? The Zweibrücken Observatory has you covered! 🔭 #StarWarsDay 📷 www.zeit.de/zett/2019-03...
A large, white-and-blue dome-shaped observatory that resembles Star Wars‘ R2-D2 stands beside a smaller physical model of the same character, set against a backdrop of a partly cloudy sky and a tree on the right.
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Robert van Engelen, PhD @engelen.bsky.social · 25/04/2026
🤬💔
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Reposted by Robert van Engelen, PhD
Massimo (mirror) @rainmaker1973-m.bsky.social · 22/04/2026
Whoever dubbed this is great Original post
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Reposted by Robert van Engelen, PhD
Vox 🇺🇲 @voxrox.bsky.social · 22/04/2026
#WonderfulBirdWednesday Right in the middle of rain, the photo was captured the split second a droplet of water landed on the #Robins head like a crown! 👑 04/2026 #Birds #Nature #FlawlessTiming 🌟 #FMSPAD #SomethingThatFlies #Birdsky #Wildlife #Photography #BirdPhotography #Macrophotography
A color, macrophoto of a Robin perched on a branch in Virginia, during late April, 2026. The capture was taken during rain and the photographer snapped the photo at the split second a raindrop fell on the top of the bird's head, making it appear like a "natural" crown.
📸 Dawn Denise Boyer of Gloucester, Virginia
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Robert van Engelen, PhD @engelen.bsky.social · 29/03/2026
DIY hacking is now LAIDI (let AI do it)? Fun little project, but using AI to write code to convert text to WAV files is not much of an achievement in my view. I’m not surprised AI could “write” that code since there are many similar open source code bases for vintage machines with tape input/output.
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Robert van Engelen, PhD @engelen.bsky.social · 05/03/2026
Very concerning.
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Robert van Engelen, PhD @engelen.bsky.social · 28/02/2026
I extensively used a Psion 5 back in the 90s, but it died by accident at the Paris airport when my bag dropped 😔. I got a replacement, but that one died a few years later when a friend broke the hinge by snap-closing it 🤬. I got 2 5mx’s from an auction. The 5mx’s are really nice.
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Robert van Engelen, PhD @engelen.bsky.social · 23/02/2026
NYC covered in snow (again) after the blizzard. Magical to walk in Central Park. The peace and tranquility of these views remind me of old Dutch Masters winter landscape paintings.
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Robert van Engelen, PhD @engelen.bsky.social · 23/02/2026
Notice something? Software bugs are proliferating everywhere fast. Almost daily something that used to work, now glitches. Besides being annoying, it’s embarrassing and may lead to serious accidents. Hire good engineers for crying out loud. And don’t rely on AI to mess up, for real engineers to fix.
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Robert van Engelen, PhD @engelen.bsky.social · 21/02/2026
Psion 5mx, the pda of the 90s. It’s very useful, perhaps even today. Has a usable keyboard. Runs a full month on a pair of AA batteries! The 90s hi-res 4 gray shades LCDs aren’t the most legible. Backlight helps a bit. Did you have one? Like it or exchange it to something else of the same period?
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adafruit @adafruit.com · 01/02/2026
gm rise and grind, since 1979... WHAT IS YOUR PROBLEM
vintage radio shack instruction manual cover titled “radio shack presents eliza.” cream-colored background with a black silhouette profile of a woman’s head at center. inside the silhouette, white text reads “how do you do? my name is eliza. what is your problem?” large red text below says “the amazing artificial intelligence simulation.” smaller text notes it is for use with trs-80 microcomputer systems. overall look is 1970s–1980s consumer computing design, earnest and slightly uncanny.
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George Conway ⚖️🇺🇸 @gtconway.bsky.social · 02/02/2026
@davidfrum.bsky.social
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Robert van Engelen, PhD @engelen.bsky.social · 30/01/2026
🤬 basterds
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Reposted by Robert van Engelen, PhD
Shipwreck @shipwreck75.bsky.social · 06/01/2026
Trump says the US "needs" Greenland for security reasons. But Danish officials have already offered him the ability to increase America's military presence there. “The option has been on the table...the White House is not interested.” www.politico.com/news/2026/01...
politico.com
Trump says his Greenland fixation is about national security. Europeans are skeptical.
Denmark’s prime minister urged the U.S. to increase its military presence in Greenland but the White House showed little interest in the offer.
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Robert van Engelen, PhD @engelen.bsky.social · 31/12/2025
ASML is an amazing company with amazing “unreasonable” people (watch to understand what that means). As a kid in the 80s I was lucky to visit Philips NatLab where my dad worked on silicon wafers to analyze properties of IC etching. But that was long before ASML youtu.be/MiUHjLxm3V0?...
youtu.be
The Ridiculous Engineering Of The World's Most Important Machine
YouTube video by Veritasium
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Reposted by Robert van Engelen, PhD
Retro Dream @retrodream.bsky.social · 16/12/2025
Part of my studio. Real stuff nostalgia: CRT scanlines, genuine hardware, loading from floppies, using ball mouse and wild joystick! Re-creating the same gaming conditions as back then. That's my philosophy. Here's how I build my setup : youtu.be/BhgM-b59cKI
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Reposted by Robert van Engelen, PhD
The Tennessee Holler @thetnholler.bsky.social · 16/12/2025
We are failing our kids
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Robert van Engelen, PhD @engelen.bsky.social · 05/12/2025
I’ve written code with SWI-Prolog since 1994, so it’s certainly over 30 years. Jan came over to our Uni when I had invited him to give a talk. Glad he also added multi-precision integers later, like I added myself using the GNU MP lib, stored as atoms. The foreign interface was very useful.
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Robert van Engelen, PhD @engelen.bsky.social · 05/12/2025
SWI-Prolog is excellent. The author, Jan Wielemaker, keeps expanding it to a does-it-all Prolog platform.
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Robert van Engelen, PhD @engelen.bsky.social · 27/11/2025
The author admits in the article that numerical weather forecast models are still needed. Numerical models use physics (PDE math etc). But AI is a black box, trained with historical data to extrapolate a prediction. AI is not robust and will make mistakes when measurements do not align with history.
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Robert van Engelen, PhD @engelen.bsky.social · 27/11/2025
Weather balloons are largely unnecessary. We have excellent weather models that are fed land-based data and sea-based data. So I’m so disappointed in IEEE to publish this unscientific article claiming that AI and weather balloons are better. spectrum.ieee.org/amp/ai-weath...
spectrum.ieee.org
Inside the Best Weather-Forecasting AI in the World
Autonomous weather balloons surf the winds to collect needed data
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Robert van Engelen, PhD @engelen.bsky.social · 22/11/2025
💔
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Robert van Engelen, PhD @engelen.bsky.social · 14/11/2025
Naïve implementation that runs in quadratic time, so won’t scale. Instead of that, use a sliding window and update the sum incrementally (subtract outgoing, add incoming). Use C++ for speed.
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Robert van Engelen, PhD @engelen.bsky.social · 12/11/2025
Yesterday’s chore: fighting back Entropy by recombining kids Lego pieces back into complete sets to save. But Lego fought back with some brittle brown pieces self-destructing in my hand 💥 So sad 😔
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Robert van Engelen, PhD @engelen.bsky.social · 09/11/2025
Toshiba HX-10 AA checkup and cleaning. Mechanical Alps keyboard is rock solid and very nice to type on. Having great fun with this industrial-looking beauty. Good to have and use for my ForthMSX development and testing with MegaRam and PicoMSX+. #MSX #Forth
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Robert van Engelen, PhD @engelen.bsky.social · 06/11/2025
Fixed! RGB output via Scart Looks amazing (compared to composite). A tiny bit of jailbars effect on the blue background, something to fix later perhaps. Likely some other caps that are out of spec.
Sony Hit Bit 75B startup with Sony MSX productivity software showing up on screen, with wedge-shaped MSX machine in front of it.Playing Galaga game with MegaRam cartridge.
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Robert van Engelen, PhD @engelen.bsky.social · 05/11/2025
Fixing a Sony Hit Bit 75B 1983. Let’s see if this baby works. I suspect it was not turned on for decades, as the 240V UK power cord was cut off. Got that fixed. But before I power this thing on, I want to replace the two crusty filter caps at the 462 and 473 transistor boards above a huge heat sink.
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Reposted by Robert van Engelen, PhD
DelaneyKirk @delaneykirk.bsky.social · 02/11/2025
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Robert van Engelen, PhD @engelen.bsky.social · 01/11/2025
Addicted? Nah. Just always close to grab, like these on our counter right now.
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Robert van Engelen, PhD @engelen.bsky.social · 31/10/2025
🎃 "Headless Slicer" cuts deep on Halloween nights 😱 Can you guess what it does? Some new retro wizardry Forthcoming! #retro #halloween #msx #forth #compiler #z80
Forth MAIN program to print Happy Halloween :-) show unused bytes free and loop 10 timesCompiler with "slicing" optimization to create small headless binaries from Forth source code (without interpreter and with unused words sliced off). Only 1211 bytes binary remains with the Forth internals, runtime, and Forth words to run the compiled program for Halloween.On an MSX1 machine screen, shows the binary hallow.bin program being loaded and run with its output "Happy Halloween" and a smiley (no pumpkin Emoji on MSX alas).
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Robert van Engelen, PhD @engelen.bsky.social · 31/10/2025
Happy retro Halloween! 🎃
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Jason Moore @moorejh.bsky.social · 28/10/2025
But does it connect to an Atari or Commodore 8-bit computer? Or maybe a 2-bit computer?
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Thomas Cherryhomes @tschak909.bsky.social · 18/10/2025
I keep trying to tell people about #FujiNet. That it is a WiFi adapter for your favorite #Atari8bit, #Apple2, #ColecoAdam, #TRS80CoCo, #Commodore, #Atari2600, #AtariLynx, and #MSDOS machines, with more to come. But word isn't getting out. Can u help? fujinet.online
fujinet.online
FujiNet - The Future of Retro Computing
The Future of Retro Computing
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