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Rowena Ball

@Rowena.mathstodon.xyz.ap.brid.gy
14 followers 3 following 365 posts

Professor in mathematical sciences, with cross-disciplinary interests in all of the sciences. Leading new research and teaching program, 'Mathematics Without Borders' […] 🌉 bridged from ⁂ mathstodon.xyz/@Rowena, follow @ap.brid.gy to interact

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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 08/10/2026
Maurice Chiodo's Ethics in Mathematics course. Very timely. arxiv.org/abs/2610.08209 #Math #Mathematics #Ethics
arxiv.org
A Primer on Ethics in Mathematics
This is a course about Ethics in Mathematics. That is, about the ethical issues that arise in mathematics itself, in mathematical work, and in the actions of mathematicians, broadly interpreted to cover all mathematically-powered technologies. This is a novel course. Traditionally, ethics has seldom been considered by, let alone taught within, the mathematics discipline. This course seeks to change that, by bringing to light the specific ethical issues relevant to mathematics, in a way that is clear and understandable to mathematicians. This course is written by mathematicians, for mathematicians, and about mathematicians. It presents new and original material, in the form of case studies covering harmful and unethical behaviour, analysis of the causal chain of events leading to such harm, and examination of the surrounding processes that drive such actions. All this is fully cited, and supported with interactive activities to aid learning. It develops much of the foundational theory of ethics in mathematics: what can go wrong, why it goes wrong, and how to address it. Students and practitioners alike take away an understanding of the context of their mathematical work, and how to change their actions to ensure more appropriate and useful outputs. In contrast to more traditional philosophy teaching, this course does not delve into the depths of ethical theory. Rather, it presents a practical, hands-on, pragmatic approach to ethics in mathematics, treating it as a branch of applied ethics. It uncovers the very particular ethical issues that arise from mathematical technologies, as well as show how general principles from ethics and responsible development apply even to mathematical work. As such, this makes it highly relevant to adjacent areas such as computer science, physics, engineering, and any other numerate discipline.
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 06/10/2026
China is offering 15-year research grants to the best young scientists for free exploration, the sole performance criterion being whether they are physically present in the laboratory. That pretty much used to be how the old IAS at ANU operated until 2000 when a conservative government (all of […]
mathstodon.xyz
Original post on mathstodon.xyz
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AJ Sadauskas @ajsadauskas.pixelfed.social.ap.brid.gy · 29/09/2026
Walking through Adelaide. #walk #walking #park #parks #cities #Adelaide #SouthAustralia #Australia
A row if white park lamps beside a path, where the winter trees have lost their leaves. The sun is gently setting in the distance.
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 26/09/2026
Now that's what I call a bus! #transport #heritage
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Jonathan Kamens 86 47 @jik.federate.social.ap.brid.gy · 25/09/2026
#EconomicJustice is an #infosec issue. Cybersecurity defenders face an ever-growing flood of professionalized online criminal activity: hacking, scams, ransomware, fraud, etc., etc. One thing many online criminal groups have in common is, they’re located in impoverished countries where the […]
federate.social
Original post on federate.social
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 23/09/2026
"Producing silicon steel is like planting an apple orchard, where each steel furnace symbolizes an individual apple tree." I do like reading technical industry manuals. It goes on: "The electromagnetic properties of the silicon steel emerge in a normal distribution, mirroring the assortment of […]
mathstodon.xyz
Original post on mathstodon.xyz
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AJ Sadauskas @ajsadauskas.pixelfed.social.ap.brid.gy · 23/09/2026
Adelaide's very grand railway station. #Adelaide #SouthAustralia #Australia #Building #Buildings #Architecture #Train #Trains #Rail #Railway #Railways #TrainStation #Photography #BuildingPhotography
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 22/09/2026
New rib vaulted ceiling of State Library station, there is an unstable equilibrium in there, not marked (of course the roof is not going to fall in, that is the point), it is a partial phase portrait around a saddle point. I don't suppose architects call it […] [Original post on mathstodon.xyz]
New rib vaulted ceiling at State Library station Melbourne
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 22/09/2026
Still standing up tall and proud. I hope the old-timer signallers who worked up there are too. Disused signal box at Footscray station. Looks like a fortress up close! Inside, the zenith of electro-mechanical engineering. What is to become of this and hundreds similar?
Disused signal box at Footscray station,  Melbourne
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 21/09/2026
What does cross-disciplinary really mean? Also inter-disciplinary, trans-disciplinary, multi-disciplinary? Should there be 'disciplines' at all? What are disciplines anyway? Why are they so? Pondering. I have been asked – as a mathematician and theoretical physical scientist – to co-edit and […]
mathstodon.xyz
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AJ Sadauskas @ajsadauskas.pixelfed.social.ap.brid.gy · 18/09/2026
Adelaide's best-known public artwork, in Rundle Mall at sunset. #Adelaide #SouthAustralia #RundleMall #MallsBalls #Australia #photography #PublicArt
Two large reflective chrome balls stacked on top of each other, standing in a pedestrianised street.Same public sculpture from a different angle, showing more of the surrounding context.
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Timothy Gowers @wtgowers.bsky.social · 17/09/2026
I've written a blog post responding to the letter about maths and AI signed by 25 Fields medallists. As with the Leiden Declaration, I didn't sign it, but I agree with much of it and welcome its existence. gowers.wordpress.com/2026/09/17/w...
gowers.wordpress.com
Why I didn’t sign the Fields medallists’ letter
When I was around 11 I heard for the first time about Fermat’s Last Theorem. I was immediately captivated by the problem statement, as well as by the accompanying story, and made a fairly ser…
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 14/09/2026
Really cool astronomy up above tonight - planet Venus cradled by the crescent moon! Get out there quick!
Venus cradled by the crescent moon,  Canberra, Australia
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 06/09/2026
Leading truck wheel of legendary NSW steam locomotive 3801, currently on a visit to Canberra. See the conical profile? That is quite an interesting story. If the wheelset running on rails is shifted to the right, the effective curvature radius of the right […] [Original post on mathstodon.xyz]
Leading truck wheel of legendary NSW steam locomotive 3801, currently on a vist to Canberra. The conical profile of the wheel is evident.
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Karl Voit :emacs: :orgmode: @publicvoit.graz.social.ap.brid.gy · 05/09/2026
#SMBC: when #mathematicians would run the #economy: www.smbc-comics.com/comic/imagine-2 🤣 #fun #math
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 05/09/2026
"CHOCOLATE ORANGE'S" at the greengrocer! (Misplaced apostrophe and all.) So of course I absolutely had to buy some! Chocolate-brown-green skin and bright orange flesh. Very sweet and juicy for my dessert fruit, but I think it's BYO actual choccies. #foodie #fruit
Orange with green-brown skin and bright, sweet juicy flesh
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 01/09/2026
RE: aus.social/@joannaholman/1171948906… I once designed a tour called "Pub Walks Between Railway Stations." But no-one has ever been on this tour, not even me.
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 27/08/2026
RE: mathstodon.xyz/@DavidWood/117164400… Repeated compulsory MFA in the workplace is a real pain. Essential for systems security, we are told. But that's a form of blaming the victim. We, nearly 100% of employees, are not responsible individually for implementing or violations […]
mathstodon.xyz
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 26/08/2026
RE: mstdn.ca/@dbattistella/117162610488… Knowledge itself has been colonized. The European-centered understanding of science organized knowledge hierarchically. Western knowledge was considered “rational” and therefore superior, while knowledge systems outside the West were […]
mathstodon.xyz
Original post on mathstodon.xyz
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Ergative Absolutive @ergative.wandering.shop.ap.brid.gy · 25/08/2026
Work in progress of my Uzbek ceramics-inspired panel. Designs taken from Dr Esra Almahal's excellent book on Islamic biomorphic patterns. Materials are gouache on hot-press watercolour paper. #humanart #islamicgeometricart
Partially painted panel of blue and white Uzbek biomorphic decoration (white vinework on blue background), laid out in a geometric grid of stars and hexagons and bowtie shapes.
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 24/08/2026
A close consultation of @railmaps @railmaps.com.au online timetables indicates that you can still travel to Sydney from Spencer street via Tocumwal. Just take the Bendigo line to Echuca, stay the night, next morning – provided it's a Tues, Thurs, or Sat – take […] [Original post on mathstodon.xyz]
Hand operated crane in the yard at Narrandera station
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 22/08/2026
My ride for today - first class on the broad gauge! #trains #railways #heritage
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 21/08/2026
Look! A three Pacific National loco looooong container train draws out of the Sun Rice factory on the triangle at Leeton, NSW, then onto the main! How lucky am I to happen on that! #trains #railways
3 Pacific National locomotives haul a loaded train out of the Sun Rice factory at Leeton, NSW
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Christian Lawson-Perfect @christianp.mathstodon.xyz.ap.brid.gy · 20/08/2026
Eddie Woo and the National Gallery of Australia have a new video series "charting the intersection between maths and art". The first one is about a sculpture called "Ouroboros", by Lindy Lee: www.youtube.com/watch?v=eJaRqLmmTQg #MathArt
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Tim Richards @timrichards.aus.social.ap.brid.gy · 14/08/2026
For #FensterFreitag - Romanesque arched windows within Goulburn railway station in New South Wales, Australia. #train #trains #Australia
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 05/08/2026
Far out! Radical! Fab! In further confirmation that Australia's national capital remains forever stuck in a 1970s time-warp, Canberra's iconic concrete bus shelters installed in 1975 have been added to the Heritage Register. We want Gough! (Right-on, I guess you just had to have been there.) […]
mathstodon.xyz
Original post on mathstodon.xyz
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 02/08/2026
RE: famichiki.jp/@RachelThornSub/117025… Social media amplifies and glorifies such men, celebrating their birth days, death days, their (dubiously attributed) pithy epigrams, pictures of their tombstones, houses, handwriting... It never ends. Then one digs a bit deeper and […]
mathstodon.xyz
Original post on mathstodon.xyz
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AJ Sadauskas @ajsadauskas.pixelfed.social.ap.brid.gy · 01/08/2026
Parramatta Railway Station at night... #train #rail #railway #station #TrainStation
A train station at night. Above is a metal roof with rows of lights. There's gaps in the roof above the tracks, through which the lights of nearby office buildings are visible. There's a train with yellow doors on another platform.
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 01/08/2026
What an absolute beauty! A fine interwar Art Deco building on the main street of Oberon, a NSW country town of the uplands. Few visitors ever make it to Oberon; almost none at all since the highway at Victoria Pass collapsed, the town's only access from […] [Original post on mathstodon.xyz]
Art Deco building – Malachi Gilmore Hall, 1937, Oberon NSW
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 01/08/2026
How to keep a heritage railway station from falling down. This method works a treat! Place an iron stepladder on the platform, and hook a giant double-headed spanner from the top rung to the awning! What was such a huge spanner used for on the railways? […] [Original post on mathstodon.xyz]
How to keep a heritage railway station from falling down. An iron stepladder on the platform, with a giant double-headed spanner hooked from the top rung to the awning! Carcoar railway station, NSW
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 31/07/2026
What a lashup! The three Abt rack engines in full steam draw the carriages out of Queenstown, Tas! www.facebook.com/reel/2125913975474… #trains #railways
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 31/07/2026
"DRUGGISTS" in etched glass. Very old pharmacist shop window in a NSW country town. Now a shop selling vapes and cheap contraband cigarettes! #fensterfrietag #windowFriday
DRUGGISTS etched glass sign in very old shop window in NSW country town
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 30/07/2026
Little sparkly fractal frosticles on the car window this morning! #fractals #fractalsinnature #mathematics
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 30/07/2026
That is a splendid iron rail bridge among the casuarinas and red gums, spanning the Lachlan and its floodplain at Cowra! The sleepers look pretty new from underneath... hmm I wonder... Couldn't really get closer to the river span, cos, you know. Snakes. I ran […] [Original post on mathstodon.xyz]
Iron rail bridge across the Lachlan at CowraUnderneath the rail bridge at Cowra
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Ugly Reykjavik @uglyreykjavik.bsky.social · 21/07/2026
For when you want to practice drawing perspective. #Iceland #photography #streetphotography #naturephotography #nature #landscapephotography #landscape #decay #abandoned #rust
A rusty abandoned greenhouse.
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 21/07/2026
Glowing striations to oyster pearl, on my walk home. I could have watched the scene forever, trying to understand, but it lasted about 30 seconds then it was all over. #nature #sunset
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 18/07/2026
The moss cross. I wonder what kinds of humble wee microscopic critters make their way through that crossroads and along the mossy highways. These pavers in my courtyard were infested with weeds in the interstices, then the city rabbits burrowed under the fence […] [Original post on mathstodon.xyz]
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 16/07/2026
I do love a Reviewer 2 who critiques, in great gen-AI detail, the article they (or chatgpt) think I OUGHT to have written, rather than the article I actually DID write. Very sweet of them, isn't it? Oh well. Far be it from me to write Reviewer 2's article for them – including their preferred […]
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Original post on mathstodon.xyz
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 12/07/2026
RE: mathstodon.xyz/@wimsigAU/1169040380… Brilliant! well done Nalini!
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 10/07/2026
RE: moresci.sale/@birds/116893916372291… There are a lot of Angry Birds, aren't there. What can we do to help them sort their anger management issues? Provide lots of warm splashy birdie therapy pools? #birds
moresci.sale
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 09/07/2026
Watching a documentary about urban wildlife in Prague. The Amazon Ants live underground and do nothing. Except when they do something. They crawl to the surface and march en masse over to the Tunnel Ants' nest, where they steal the Tunnel Ants' pupae. They […] [Original post on mathstodon.xyz]
The Amazon Ants of Prague
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Tim Richards @timrichards.aus.social.ap.brid.gy · 08/07/2026
While I'm at it, here are a couple of Melbourne pics from yesterday evening, just after sunset. A certain crispness to the light, and those colours stand out. #Melbourne #tram #trams
View along Elizabeth Street.View of red tram and bright lights.
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 06/07/2026
RE: scholar.social/@SylviaFysica/116872… Conway gave us Alternative Facts, Trump sold Alternative Mathematics to the Free World, now the UN is gifting Alternative Chemistry to the Global South. Much appreciated in Goma no doubt no doubt.
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 05/07/2026
RE: social.circl.lu/@quinn/116866447844… True, that. On the other hand, see the Devil inducting sinners into Hell, www.youtube.com/watch?v=VrwIs10XvKA – 'Americans – line up over there please. Yes I'm sorry about that. Apparently God had a little falling out with your […]
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Original post on mathstodon.xyz
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AJ Sadauskas @aj.gts.sadauskas.id.au.ap.brid.gy · 04/07/2026
Remember the culture war outrage around a decade ago over the idea that statues of Confederate Soldiers and slave owners should be removed? Including the far-right violence in Charlottesville in the US? Remember the self-righteous indignation at the suggestion that displays highlighting Ben […]
gts.sadauskas.id.au
Original post on gts.sadauskas.id.au
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 01/07/2026
A hundred years of public transport in Canberra! www.transport.act.gov.au/news/news-… #transit #publictransport
A vintage bus, one of the first public transport buses of Canberra
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Tim Richards @timrichards.aus.social.ap.brid.gy · 01/07/2026
Catching a tram from the Elizabeth Street terminus. Peak Melbourne! #Melbourne #tram #trams
View down tram tracks toward Flinders Street Station.
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 29/06/2026
RE: mathstodon.xyz/@Don_Rubiel/11683174… A similar conundrum is already here with grant applications in the mathematical sciences, some of which I have seen are riddled with gen-AI content. What, exactly, am I supposed to assess in such applications when they are sent to me, as […]
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Original post on mathstodon.xyz
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Philip Mallis 🇺🇦 @philip.aus.social.ap.brid.gy · 28/06/2026
The best food for a cold winter's night, αβγολέμονο (Greek chicken soup with egg and lots of lemon) #GreekFood #winter #cooking
Photo of a bowl of αβγολέμονο soup on a bench with a spoon in the white bowl
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Rowena Ball @rowena.mathstodon.xyz.ap.brid.gy · 26/06/2026
RE: rssfeed.media/@abcfeeds/11681322804… The Strait of Mount Victoria will remain closed for another 12 or 15 months while a new bridge is built over the existing causeway. That's optimism for you! #bridges #transport
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