Alastair Roxburgh
@nthderivative.bsky.social
Sustainability activist♻️◦ home-roasted espresso🤎◦ AJ4RF ◦🌻◦
Astro🔭/Space🛰️🚀/Cosmology🔮/Physics⚛️/Math🧮/Geek🤓 ◦
QC skeptic🥱◦ LuaLaTeX✍️◦ The Telegoons🎭◦ Pink Floyd🎸◦
POV: Scientific knowledge is uncertain🎲Scientific consensus is oxymoronic😕
Astro🔭/Space🛰️🚀/Cosmology🔮/Physics⚛️/Math🧮/Geek🤓 ◦
QC skeptic🥱◦ LuaLaTeX✍️◦ The Telegoons🎭◦ Pink Floyd🎸◦
POV: Scientific knowledge is uncertain🎲Scientific consensus is oxymoronic😕
Pinned
👾💥DARK MATTER💥👾 What is it made of? Given the conflicting results (see chart, Physics 6, 136, Lang), is that even the right question? Somehow associated with matter, scientists know a little about what it isn't, but the mystery remains unsolved after many decades of research!
#DarkMatter #Physics
#DarkMatter #Physics
Essential reading about the Ukraine conflict:
The reason why this is no time for Zelensky to grovel to Trump!
www.msn.com/en-us/news/o...
The reason why this is no time for Zelensky to grovel to Trump!
www.msn.com/en-us/news/o...
March 4, 2025 at 8:44 PM
Essential reading about the Ukraine conflict:
The reason why this is no time for Zelensky to grovel to Trump!
www.msn.com/en-us/news/o...
The reason why this is no time for Zelensky to grovel to Trump!
www.msn.com/en-us/news/o...
Tragically, the willfully ignorant low-lifes currently occupying the White House are proud of their occupancy of the lower half of the bell curve. If anything disproves the adage that suits maketh the man, it would be their treatment of Volodymyr Zelensky in the Oval Office. He outshone them all!
On Friday we watched two cheap, low-life hoods trying to extort money from a drowning Ukranian man, his family and his country, while pretending they're not criminals because they wear suits.
If he gave the full asking price, they wouldn't even commit to saving his family, or country.
EXTORTION.
If he gave the full asking price, they wouldn't even commit to saving his family, or country.
EXTORTION.
March 4, 2025 at 7:27 AM
Tragically, the willfully ignorant low-lifes currently occupying the White House are proud of their occupancy of the lower half of the bell curve. If anything disproves the adage that suits maketh the man, it would be their treatment of Volodymyr Zelensky in the Oval Office. He outshone them all!
As far as I can recall, Lieutenant Columbo never lost a case.
"You said you were going to end the war in 24 hours, now it's 100 days. You're threatening Russia with tariffs that you're putting on Canada & Mexico. Was that the secret plan? Just one more thing, sir: How's the healthcare concept of a plan going? It's been way over two weeks."
March 3, 2025 at 9:27 PM
As far as I can recall, Lieutenant Columbo never lost a case.
Reposted by Alastair Roxburgh
"I must go down to the sea again,
To the lonely sea and the sky,
I left my son and Dalek there,
I wonder if they're dry."
After John Masefield (and Spike Milligan)
To the lonely sea and the sky,
I left my son and Dalek there,
I wonder if they're dry."
After John Masefield (and Spike Milligan)
February 22, 2025 at 9:27 AM
"I must go down to the sea again,
To the lonely sea and the sky,
I left my son and Dalek there,
I wonder if they're dry."
After John Masefield (and Spike Milligan)
To the lonely sea and the sky,
I left my son and Dalek there,
I wonder if they're dry."
After John Masefield (and Spike Milligan)
Does the #timescape theory herald the end of the 'physics doldrums' that began with the elevation of string theory into an unobserved & unprovable set of beliefs (SUSY), and ended when the exponential improvements in sensor tech overwhelmed us with observations that demanded a more direct approach?
Happy New Year everyone! We are starting 2025 with a look at that recent paper which claimed that dark energy doesn't exist and that we instead live in a "timescape".
www.youtube.com/watch?v=frJy...
www.youtube.com/watch?v=frJy...
Dark Energy Is Not Real, New Data Analysis Finds
YouTube video by Sabine Hossenfelder
www.youtube.com
January 25, 2025 at 6:18 AM
Does the #timescape theory herald the end of the 'physics doldrums' that began with the elevation of string theory into an unobserved & unprovable set of beliefs (SUSY), and ended when the exponential improvements in sensor tech overwhelmed us with observations that demanded a more direct approach?
Hertz, Clerk Maxwell, and Heaviside would have enjoyed these products of millimeterwave machine vision!
A reminder that humans are capable of great acts of wonder when we work together & embrace knowledge.
An international team of astronomers has discovered swarms of cold comets circling 74 nearby stars -- and got clear pictures of these "exocomet belts." 🧪🔭
www.iac.es/en/outreach/...
An international team of astronomers has discovered swarms of cold comets circling 74 nearby stars -- and got clear pictures of these "exocomet belts." 🧪🔭
www.iac.es/en/outreach/...
January 25, 2025 at 2:46 AM
Hertz, Clerk Maxwell, and Heaviside would have enjoyed these products of millimeterwave machine vision!
Many if not most plastics go hand in hand with the fossil fuels they are made from. For succeeding generations to enjoy long lives in a world free from the endocrine disrupting effects of micro plastics pollution, we must find viable alternatives (such as glass, wood, & paper) before it's too late!
January 6, 2025 at 1:27 AM
Many if not most plastics go hand in hand with the fossil fuels they are made from. For succeeding generations to enjoy long lives in a world free from the endocrine disrupting effects of micro plastics pollution, we must find viable alternatives (such as glass, wood, & paper) before it's too late!
This sultry scene evokes for me the poignancy of Replicant's Soliloquy in Blade Runner (superbly portrayed by Rutger Hauer):
"I watched c-beams glitter in the dark near the Tannhäuser Gate." [but unless we can learn to live & let live] "All those moments will be lost in time, like tears in rain."
"I watched c-beams glitter in the dark near the Tannhäuser Gate." [but unless we can learn to live & let live] "All those moments will be lost in time, like tears in rain."
1/3 🔭 🧪 #SciArt 🧵
Sea and sky came together to give us a unique spectacle in this extraordinary image, captured in mid-Feb 2023 by Petr Horálek/Institute of Physics in Opava.
Image source➡️ apod.nasa.gov/apod/ap23052...
The Indian Ocean laps the coast of Soneva Jani, an island in the Maldives.
Sea and sky came together to give us a unique spectacle in this extraordinary image, captured in mid-Feb 2023 by Petr Horálek/Institute of Physics in Opava.
Image source➡️ apod.nasa.gov/apod/ap23052...
The Indian Ocean laps the coast of Soneva Jani, an island in the Maldives.
January 1, 2025 at 5:57 PM
This sultry scene evokes for me the poignancy of Replicant's Soliloquy in Blade Runner (superbly portrayed by Rutger Hauer):
"I watched c-beams glitter in the dark near the Tannhäuser Gate." [but unless we can learn to live & let live] "All those moments will be lost in time, like tears in rain."
"I watched c-beams glitter in the dark near the Tannhäuser Gate." [but unless we can learn to live & let live] "All those moments will be lost in time, like tears in rain."
Reposted by Alastair Roxburgh
"Dark Energy does not exist" [A study, via the Royal Astronomical Society] 🧪🌌⚫🔋❌
"New evidence supports the 'timescape' model of expansion, which doesn't have a need for dark energy"
ras.ac.uk/news-and-pre...
#dark #energy #universe #expansion #acceleration #time #relativity #space #astronomy
"New evidence supports the 'timescape' model of expansion, which doesn't have a need for dark energy"
ras.ac.uk/news-and-pre...
#dark #energy #universe #expansion #acceleration #time #relativity #space #astronomy
Dark energy 'doesn’t exist' so can't be pushing 'lumpy' Universe apart – study
One of the biggest mysteries in science – dark energy – doesn't actually exist, according to researchers looking to solve the riddle of how the Universe
is expan...
ras.ac.uk
December 21, 2024 at 9:23 PM
"Dark Energy does not exist" [A study, via the Royal Astronomical Society] 🧪🌌⚫🔋❌
"New evidence supports the 'timescape' model of expansion, which doesn't have a need for dark energy"
ras.ac.uk/news-and-pre...
#dark #energy #universe #expansion #acceleration #time #relativity #space #astronomy
"New evidence supports the 'timescape' model of expansion, which doesn't have a need for dark energy"
ras.ac.uk/news-and-pre...
#dark #energy #universe #expansion #acceleration #time #relativity #space #astronomy
Kudos to Kiwi Astronomers! Dark Energy? Maybe we don't need it! Having done work many years ago at NZ's U of Canterbury Mount John Observatory, I could not help but notice this article (see the report below for a link to the open-source journal article). www.msn.com/en-us/news/t...
December 21, 2024 at 1:29 AM
Kudos to Kiwi Astronomers! Dark Energy? Maybe we don't need it! Having done work many years ago at NZ's U of Canterbury Mount John Observatory, I could not help but notice this article (see the report below for a link to the open-source journal article). www.msn.com/en-us/news/t...
A friendly Photoshopped 'wave' to espresso PID fans! 😜
My setup: Rancilio Silvia with Auber PID + clockwork timer; Rancilio Rocky Grinder; Rancilio bottomless portfilter conversion with double basket; Matlow 58 mm SS Dosing Ring; TimeMore coffee scale; Espresso Gear 58 mm convex Barista tamper.☕
My setup: Rancilio Silvia with Auber PID + clockwork timer; Rancilio Rocky Grinder; Rancilio bottomless portfilter conversion with double basket; Matlow 58 mm SS Dosing Ring; TimeMore coffee scale; Espresso Gear 58 mm convex Barista tamper.☕
December 14, 2024 at 7:59 PM
A friendly Photoshopped 'wave' to espresso PID fans! 😜
My setup: Rancilio Silvia with Auber PID + clockwork timer; Rancilio Rocky Grinder; Rancilio bottomless portfilter conversion with double basket; Matlow 58 mm SS Dosing Ring; TimeMore coffee scale; Espresso Gear 58 mm convex Barista tamper.☕
My setup: Rancilio Silvia with Auber PID + clockwork timer; Rancilio Rocky Grinder; Rancilio bottomless portfilter conversion with double basket; Matlow 58 mm SS Dosing Ring; TimeMore coffee scale; Espresso Gear 58 mm convex Barista tamper.☕
AGC simulator runs original Apollo code
github.com/virtualagc/v...
Ron Burkey runs Virtual AGC. You can download software that faithfully emulates the AGC and executes real Apollo flight software. Compiler is included if you want to compile the original AGC codef. Amazing.
www.ibiblio.org/apollo/
github.com/virtualagc/v...
Ron Burkey runs Virtual AGC. You can download software that faithfully emulates the AGC and executes real Apollo flight software. Compiler is included if you want to compile the original AGC codef. Amazing.
www.ibiblio.org/apollo/
GitHub - virtualagc/virtualagc: Virtual Apollo Guidance Computer (AGC) software
Virtual Apollo Guidance Computer (AGC) software. Contribute to virtualagc/virtualagc development by creating an account on GitHub.
github.com
November 23, 2024 at 11:00 PM
AGC simulator runs original Apollo code
github.com/virtualagc/v...
Ron Burkey runs Virtual AGC. You can download software that faithfully emulates the AGC and executes real Apollo flight software. Compiler is included if you want to compile the original AGC codef. Amazing.
www.ibiblio.org/apollo/
github.com/virtualagc/v...
Ron Burkey runs Virtual AGC. You can download software that faithfully emulates the AGC and executes real Apollo flight software. Compiler is included if you want to compile the original AGC codef. Amazing.
www.ibiblio.org/apollo/
This cool bit of nerdism deserves wider recognition. While probably not as difficult as writing an AGC simulator (see the next post), it seems oddly more relevant now due to the interest in intelligent machines and machine vision.
www.eetimes.com/using-a-xili...
www.eetimes.com/using-a-xili...
November 23, 2024 at 10:52 PM
This cool bit of nerdism deserves wider recognition. While probably not as difficult as writing an AGC simulator (see the next post), it seems oddly more relevant now due to the interest in intelligent machines and machine vision.
www.eetimes.com/using-a-xili...
www.eetimes.com/using-a-xili...
FYI. I found this in my archive, labeled as
"Nerdy stuff I did when I was in high school!" 😁
"Nerdy stuff I did when I was in high school!" 😁
November 23, 2024 at 10:46 PM
FYI. I found this in my archive, labeled as
"Nerdy stuff I did when I was in high school!" 😁
"Nerdy stuff I did when I was in high school!" 😁
This picture tickled my physics funny bone!
November 23, 2024 at 10:23 PM
This picture tickled my physics funny bone!
Is QC the Emperor's New Clothes?
Deloitte: "We don't yet know the 'magic number' of [qubits]...that will make QCs useful in the real world. ...it is unclear if we need...a thousand, a million or a billion to make QCs [useful] in multiple real-world apps."
www2.deloitte.com/us/en/insigh...
Deloitte: "We don't yet know the 'magic number' of [qubits]...that will make QCs useful in the real world. ...it is unclear if we need...a thousand, a million or a billion to make QCs [useful] in multiple real-world apps."
www2.deloitte.com/us/en/insigh...
Quantum computing in 2022: Newsful, but how useful?
The future of quantum computing isn’t quite here yet. But that doesn’t mean that companies shouldn’t prepare.
www2.deloitte.com
November 23, 2024 at 10:20 PM
Is QC the Emperor's New Clothes?
Deloitte: "We don't yet know the 'magic number' of [qubits]...that will make QCs useful in the real world. ...it is unclear if we need...a thousand, a million or a billion to make QCs [useful] in multiple real-world apps."
www2.deloitte.com/us/en/insigh...
Deloitte: "We don't yet know the 'magic number' of [qubits]...that will make QCs useful in the real world. ...it is unclear if we need...a thousand, a million or a billion to make QCs [useful] in multiple real-world apps."
www2.deloitte.com/us/en/insigh...
The wonders of VLB radio astronomy!
www.wired.com/story/astron...
www.wired.com/story/astron...
Astronomers Radically Reimagine the Making of the Planets
Observations of faraway worlds have forced a near-total rewrite of the story of our solar system.
www.wired.com
November 23, 2024 at 10:17 PM
The wonders of VLB radio astronomy!
www.wired.com/story/astron...
www.wired.com/story/astron...
A fun AI fact of broad significance. Like some cars, certain animals, e.g., army ants, can also be "trapped" by circles. They follow pheromone trails and can get stuck in a loop if the trail forms a circle, walking in circles until exhaustion sets in. Please reply if you know of other examples
November 23, 2024 at 10:15 PM
A fun AI fact of broad significance. Like some cars, certain animals, e.g., army ants, can also be "trapped" by circles. They follow pheromone trails and can get stuck in a loop if the trail forms a circle, walking in circles until exhaustion sets in. Please reply if you know of other examples
Apr 20, 2023
How old is JWST dusty galaxy CEERS-93316? Previously reported with redshift z=16.4 (a mere 250 My after Big Bang), revised spectrographic data modeling now gives z=4.9 (a less problematic 1,217 My after Big Bang)! physicsworld.com/a/jwst-spect...
ArXiv: arxiv.org/pdf/2303.154...
How old is JWST dusty galaxy CEERS-93316? Previously reported with redshift z=16.4 (a mere 250 My after Big Bang), revised spectrographic data modeling now gives z=4.9 (a less problematic 1,217 My after Big Bang)! physicsworld.com/a/jwst-spect...
ArXiv: arxiv.org/pdf/2303.154...
JWST spectrometer refines redshifts of distant galaxies – Physics World
One galaxy is much closer than previously thought
physicsworld.com
November 18, 2024 at 8:24 PM
Apr 20, 2023
How old is JWST dusty galaxy CEERS-93316? Previously reported with redshift z=16.4 (a mere 250 My after Big Bang), revised spectrographic data modeling now gives z=4.9 (a less problematic 1,217 My after Big Bang)! physicsworld.com/a/jwst-spect...
ArXiv: arxiv.org/pdf/2303.154...
How old is JWST dusty galaxy CEERS-93316? Previously reported with redshift z=16.4 (a mere 250 My after Big Bang), revised spectrographic data modeling now gives z=4.9 (a less problematic 1,217 My after Big Bang)! physicsworld.com/a/jwst-spect...
ArXiv: arxiv.org/pdf/2303.154...
Apr 23, 2023
Planet Decision That Booted Out Pluto is Rooted in Folklore, Astrology, Study Suggests
From ucf.edu
Planet Decision That Booted Out Pluto is Rooted in Folklore, Astrology, Study Suggests
From ucf.edu
University of Central Florida | Top-Ranked by U.S News & World Reports
UCF unleashes the potential of students, faculty & the community. As Florida's next-generation public research institute, we are shaping the future & working to solve the world’s most challenging prob...
ucf.edu
November 18, 2024 at 8:22 PM
Apr 23, 2023
Planet Decision That Booted Out Pluto is Rooted in Folklore, Astrology, Study Suggests
From ucf.edu
Planet Decision That Booted Out Pluto is Rooted in Folklore, Astrology, Study Suggests
From ucf.edu
👾💥DARK MATTER💥👾 What is it made of? Given the conflicting results (see chart, Physics 6, 136, Lang), is that even the right question? Somehow associated with matter, scientists know a little about what it isn't, but the mystery remains unsolved after many decades of research!
#DarkMatter #Physics
#DarkMatter #Physics
November 18, 2024 at 7:30 PM
👾💥DARK MATTER💥👾 What is it made of? Given the conflicting results (see chart, Physics 6, 136, Lang), is that even the right question? Somehow associated with matter, scientists know a little about what it isn't, but the mystery remains unsolved after many decades of research!
#DarkMatter #Physics
#DarkMatter #Physics
MT @coffee_facts No matter the tech historians who claim that BC stands for "Before Computers," it really stands for "Before Coffee."
November 18, 2024 at 1:54 AM
MT @coffee_facts No matter the tech historians who claim that BC stands for "Before Computers," it really stands for "Before Coffee."
Scott Carpenter, of #NASA 's 1st astronaut class, the Mercury Seven, died today, 88. Thank you Scott, for inspiring my #technology career!
November 18, 2024 at 1:54 AM
Scott Carpenter, of #NASA 's 1st astronaut class, the Mercury Seven, died today, 88. Thank you Scott, for inspiring my #technology career!
Columbia River's 100 navigable miles silting up; new ships too big; CR Bar is ranked world's most dangerous. Bad news for Port of Portland!
November 18, 2024 at 1:54 AM
Columbia River's 100 navigable miles silting up; new ships too big; CR Bar is ranked world's most dangerous. Bad news for Port of Portland!
At $$$BUX prices I paid for my home #coffee setup (roaster, grinder, PID-controlled espresso machine) in a year. Now I'm saving $120/month!
November 18, 2024 at 1:54 AM
At $$$BUX prices I paid for my home #coffee setup (roaster, grinder, PID-controlled espresso machine) in a year. Now I'm saving $120/month!