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Researchers propose a computational method to reveal the hidden timing structure of live performance. Vanessa C. Pope and colleagues present a framework, called Topology Analysis of Matching Sequences (TAMS), that algorithmically detects repeated material across performances and maps its timing to visualize performance dynamics. The work is published in PNAS Nexus.

Living slowly, aging fast: The prison paradox

Tuesday, 20 January 2026 09:20
[syndicated profile] phys_social_feed
The days can seem endless in Canadian prisons—and yet, inside, inmates actually age faster than on the outside. Why?
[syndicated profile] phys_social_feed
Almost half (45%) of teachers across primary and secondary schools in the UK describe misogynistic attitudes and behavior among boys as being a problem, according to a YouGov survey in 2025. Additionally, 54% of secondary school teachers indicate that boys very or fairly often openly express misogynistic attitudes or behavior in school.
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Posted by Joel

Book 11 of the Iliad is one of those battle books that often get lost in conversations about the whole. But the poem does contribute critically to the plot: enough of the prominent Greeks are wounded that the battle begins to turn definitively in the Trojans’ favor. Achilles, watching from the sidelines, notices, and sends Patroklos to investigate. Nestor tells Patroklos a rather long story to persuade him to either convince Achilles to return to war or to lead the Myrmidons to battle in Achilles’ place.
 
These contributions to the plot make Iliad 11 essential. But the book has some other, more nuanced aspects as well. As I discussed in the first post on book 11, the wounding of heroes, particularly Diomedes, engages with extra-Iliadic traditions in fascinating ways. The book also advances the epic’s strategy of deferring Achilles’ appearance. This time, however, Achilles appears briefly. And what we make of his actions changes how we approach his character.

We find Achilles eagerly watching the action, despite the fact that it is taking place on the other side of the Achaean fortifications.

Homer, Iliad 11.596-615

“So they were struggling like a burning fire
And Neleus’ horses were bringing Nestor out of the war,
Covered in sweat as they also drove Makhaon, the shepherd of the host.
Shining Achilles recognized him when he saw him.
For he was standing on the stern of his huge-hulled ship,
Watching the terrible conflict and the lamentable retreat.
He quickly turned to his companion Patroklos and spoke
To him next to the ship. He heard as he came from their dwelling
Like Ares himself, and this was the beginning of his trouble.

So, the brave son of Menoitios spoke first:
Why are you calling me, Achilles? What need do you have of me?

Swift footed Achilles spoke to him in answer:

“Shining son of Menoitios, most cherished to my own heart,
Now I think that the Achaeans are about to stand begging
Around my knees. For a need comes upon them, and it is no longer tolerable.

But come, now Patroklos dear to Zeus, go ask Nestor
Who that man is he leads wounded from the war.
Certainly he looks from this angle in every way like Makhaon,
Asclepius’ son, bit I cannot see the man’s eyes,
Since the horses raced past me in their eager stride.”

῝Ως οἳ μὲν μάρναντο δέμας πυρὸς αἰθομένοιο·
Νέστορα δ’ ἐκ πολέμοιο φέρον Νηλήϊαι ἵπποι
ἱδρῶσαι, ἦγον δὲ Μαχάονα ποιμένα λαῶν.
τὸν δὲ ἰδὼν ἐνόησε ποδάρκης δῖος ᾿Αχιλλεύς·
ἑστήκει γὰρ ἐπὶ πρυμνῇ μεγακήτεϊ νηῒ
εἰσορόων πόνον αἰπὺν ἰῶκά τε δακρυόεσσαν.
αἶψα δ’ ἑταῖρον ἑὸν Πατροκλῆα προσέειπε
φθεγξάμενος παρὰ νηός· ὃ δὲ κλισίηθεν ἀκούσας
ἔκμολεν ἶσος ῎Αρηϊ, κακοῦ δ’ ἄρα οἱ πέλεν ἀρχή.
τὸν πρότερος προσέειπε Μενοιτίου ἄλκιμος υἱός·
τίπτέ με κικλήσκεις ᾿Αχιλεῦ; τί δέ σε χρεὼ ἐμεῖο;
τὸν δ’ ἀπαμειβόμενος προσέφη πόδας ὠκὺς ᾿Αχιλλεύς·
δῖε Μενοιτιάδη τῷ ἐμῷ κεχαρισμένε θυμῷ
νῦν ὀΐω περὶ γούνατ’ ἐμὰ στήσεσθαι ᾿Αχαιοὺς
λισσομένους· χρειὼ γὰρ ἱκάνεται οὐκέτ’ ἀνεκτός.
ἀλλ’ ἴθι νῦν Πάτροκλε Διῒ φίλε Νέστορ’ ἔρειο
ὅν τινα τοῦτον ἄγει βεβλημένον ἐκ πολέμοιο·
ἤτοι μὲν τά γ’ ὄπισθε Μαχάονι πάντα ἔοικε
τῷ ᾿Ασκληπιάδῃ, ἀτὰρ οὐκ ἴδον ὄμματα φωτός·
ἵπποι γάρ με παρήϊξαν πρόσσω μεμαυῖαι.

There are some interesting responses from ancient scholars. Variously, they see Achilles’ viewing of the battle as an indication of his character and a creation of suspense.

Schol Tb ad Hom. Il. 11. 600-1 ex

“Achilles is shown to be a lover of war here by his viewing of the battle. Still, the poet crafts this in anticipation for Achilles’ return.”

τὸ φιλοπόλεμον ᾿Αχιλλέως ἐνδείκνυται τῷ θεωρεῖν τὴν μάχην. ἅμα δὲ καὶ ᾠκονόμησε ταύτην ὁ ποιητὴς πρὸς τὴν ἔξοδον ᾿Αχιλλέως.

There is also interest in the action Achilles takes here:

Schol. T ad Hom. Il. 11.611 ex

“It is strange that [Achilles] sends [Patroklos] out to the scene of someone wounded”

ἄτοπον γάρ ἐστιν εἰς τὴν σκηνὴν τοῦ τρωθέντος ἀποστέλλειν αὐτόν.

But many comments attend to the brief narrative foreshadowing “and that was the beginning of evil for him” (κακοῦ δ’ ἄρα οἱ πέλεν ἀρχή).

Schol. bT ad Hom. Il. 11.605 ex

“The declaration makes the audience eager to learn what this evil might be. The poet creates this with a brief indication. If he had done more, he would have ruined the order of events and weakened the poem.”

ἀναπτεροῖ τὸν ἀκροατὴν ἡ ἀναφώνησις ἐπειγόμενον μαθεῖν, τί τὸ κακὸν ἦν. προσοχὴν δὲ ἐργάζεται διὰ βραχείας ἐνδείξεως· εἰ γὰρ πλέον ἐπεξειργάσατο, διέφθειρεν ἂν τὸν ἑξῆς λόγον καὶ ἀπήμβλυνε τὴν ποίησιν.

These comments on Achilles’ character show something of a limited understanding. There is an argument to be made throughout the Iliad that when characters who are not engaged in the conflict are watching the battle they function in part as stand-ins for the external audience, helping us to see the action in a different way. In this, I think about the function of the chorus in Greek tragedy—the choruses are far from neutral parties in Athenian drama, but they are nonetheless capable of acting as vehicles between the main story and the audience. Achilles, standing on the stern of his ship, watching with interest both helps us remember that these events are extraordinary and provides us with a few moments respite from the conflict.

Achilles, however, is not like any other character: when he watches, his interest is something altogether different. His stance in part reminds me of those moments when Zeus retreats to watch the battle from somewhere else. A primary difference is that Achilles’ interest is not neutral: as he himself expresses in this passage, the increased suffering of the Achaeans makes it likely that they will appeal to them again. Indeed, ancient scholars have commented on Achilles standing and watching the battle as evidence of his love of war (he just likes to watch fighting, I guess) or his love of honor (is he rooting for the Achaeans to suffer more quickly so that they will offer him more to return?)

As is usually the case, the ambiguity of the scene is part of the point. While Achilles does say that the Greeks will be begging him soon, he swore an oath not to return to battle until the fire reaches his ships in Iliad 9. That recent action makes it difficult to argue that Achilles is simply waiting to be compensated or glorified. He is concerned about a particular person being injured and wants to know what is actually happening in the conflict. Achilles’ limited knowledge here echoes that part of him that is not super human: his knowledge of others’ deaths and fates. Indeed, this scene’s narrative commentary “and it was the beginning of his trouble” points to the limits of human knowledge. The irony we as the audience know is that Achilles prayed for the Achaeans to suffer to make up for his dishonor and he is just now about to send his own cherished Patroklos out there to become part of the comeuppance.

As Jinyo Kim writes in her 2001 book The Pity of Achilles, the hero’s watching of the conflict is a confirmation of Achilles’ concern for the Greeks: the primary arguments that moved him in the earlier embassy (see especially 103-113). She notes that Achilles’ language about how dire the situation is (λισσομένους· χρειὼ γὰρ ἱκάνεται οὐκέτ’ ἀνεκτός) repeats what Nestor said in the previous book. As Kim notes, Achilles knows the situation is bad and does not need to send Patroklos to confirm it. Instead, he is demonstrating a concern for others that is consonant with his characterization in book 9 and his final turn to empathy in book 24.

Objections to this argument will point out that Achilles himself remains distant: Kim argues that Patroklos here begins to function as a ritual replacement for Achilles in book 11, rather than 16. I think this argument works well to help us understand that Achilles is showing his concern for the Achaeans through Patroklos because he is constrained by the oath he took at the end of book 9. Achilles looks like he is cruel and Nestor expresses criticism to that effect. But Patroklos anticipates this when he says to Nestor: “Divine old man, you know what kind of guy that terrible man is. He would quickly blame the blameless” (εὖ δὲ σὺ οἶσθα γεραιὲ διοτρεφές, οἷος ἐκεῖνος / δεινὸς ἀνήρ· τάχα κεν καὶ ἀναίτιον αἰτιόῳτο (11.653-654). A scholiast explains Patroklos’ comments as somewhat self-defensive: “He is pointing to Achilles’ irascibility, gaining for himself some pardon for not persuading him”  ἐπιτείνει δὲ αὐτοῦ τὸ θυμικόν, συγγνώμην ἑαυτῷ ποριζόμενος τοῦ μὴ πεῖσαι αὐτόν, Schol. bT Ad Hom. Il. 11.654).

But I suspect that there is something more personal. The adjective deinos—which famously can mean ‘terrible, marvelous, amazing’—is only applied to mortals in limited conditions in the Iliad. At its root, it is related to verbs of fear and amazement. Gods leaving or entering battle often receive this description, but Helen uses it in addressing Priam in book 3 (171). There’s a familiar sense to this personal use, indicating that the speaker is full of amazement and confusion at the target’s behavior. Patroklos not understand Achilles’ behavior, just as the members of the Embassy in book 9 are confused.

Achilles and Ajax red figure vase playing a game
Two handled amphora with Achilles and Ajax, c. 520 BCE, Museum of Fine Arts,

Mistakes were made

Tuesday, 20 January 2026 09:02
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One of Canada's great missteps was not mining the border. The other was not building intermediate range nuclear-armed missiles.


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November 25, 2026 would have been Poul Anderson’s 100th birthday. As there is no guarantee any of us will see November 25, 2026, I’ll borrow an idea from Tom Lehrer’s That Was the Year That Was and start writing something appropriately celebratory now.

Homeward By Starlight



Improve your sword and sorcery through inspirational verisimilitude!


On Thud and Blunder by Poul Anderson

Could ChatGPT Convince You to Buy Something?

Tuesday, 20 January 2026 12:08
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Posted by Bruce Schneier

Eighteen months ago, it was plausible that artificial intelligence might take a different path than social media. Back then, AI’s development hadn’t consolidated under a small number of big tech firms. Nor had it capitalized on consumer attention, surveilling users and delivering ads.

Unfortunately, the AI industry is now taking a page from the social media playbook and has set its sights on monetizing consumer attention. When OpenAI launched its ChatGPT Search feature in late 2024 and its browser, ChatGPT Atlas, in October 2025, it kicked off a race to capture online behavioral data to power advertising. It’s part of a yearslong turnabout by OpenAI, whose CEO Sam Altman once called the combination of ads and AI “unsettling” and now promises that ads can be deployed in AI apps while preserving trust. The rampant speculation among OpenAI users who believe they see paid placements in ChatGPT responses suggests they are not convinced.

In 2024, AI search company Perplexity started experimenting with ads in its offerings. A few months after that, Microsoft introduced ads to its Copilot AI. Google’s AI Mode for search now increasingly features ads, as does Amazon’s Rufus chatbot. OpenAI announced on Jan. 16, 2026, that it will soon begin testing ads in the unpaid version of ChatGPT.

As a security expert and data scientist, we see these examples as harbingers of a future where AI companies profit from manipulating their users’ behavior for the benefit of their advertisers and investors. It’s also a reminder that time to steer the direction of AI development away from private exploitation and toward public benefit is quickly running out.

The functionality of ChatGPT Search and its Atlas browser is not really new. Meta, commercial AI competitor Perplexity and even ChatGPT itself have had similar AI search features for years, and both Google and Microsoft beat OpenAI to the punch by integrating AI with their browsers. But OpenAI’s business positioning signals a shift.

We believe the ChatGPT Search and Atlas announcements are worrisome because there is really only one way to make money on search: the advertising model pioneered ruthlessly by Google.

Advertising model

Ruled a monopolist in U.S. federal court, Google has earned more than US$1.6 trillion in advertising revenue since 2001. You may think of Google as a web search company, or a streaming video company (YouTube), or an email company (Gmail), or a mobile phone company (Android, Pixel), or maybe even an AI company (Gemini). But those products are ancillary to Google’s bottom line. The advertising segment typically accounts for 80% to 90% of its total revenue. Everything else is there to collect users’ data and direct users’ attention to its advertising revenue stream.

After two decades in this monopoly position, Google’s search product is much more tuned to the company’s needs than those of its users. When Google Search first arrived decades ago, it was revelatory in its ability to instantly find useful information across the still-nascent web. In 2025, its search result pages are dominated by low-quality and often AI-generated content, spam sites that exist solely to drive traffic to Amazon sales—a tactic known as affiliate marketing—and paid ad placements, which at times are indistinguishable from organic results.

Plenty of advertisers and observers seem to think AI-powered advertising is the future of the ad business.

Highly persuasive

Paid advertising in AI search, and AI models generally, could look very different from traditional web search. It has the potential to influence your thinking, spending patterns and even personal beliefs in much more subtle ways. Because AI can engage in active dialogue, addressing your specific questions, concerns and ideas rather than just filtering static content, its potential for influence is much greater. It’s like the difference between reading a textbook and having a conversation with its author.

Imagine you’re conversing with your AI agent about an upcoming vacation. Did it recommend a particular airline or hotel chain because they really are best for you, or does the company get a kickback for every mention? If you ask about a political issue, does the model bias its answer based on which political party has paid the company a fee, or based on the bias of the model’s corporate owners?

There is mounting evidence that AI models are at least as effective as people at persuading users to do things. A December 2023 meta-analysis of 121 randomized trials reported that AI models are as good as humans at shifting people’s perceptions, attitudes and behaviors. A more recent meta-analysis of eight studies similarly concluded there was “no significant overall difference in persuasive performance between (large language models) and humans.”

This influence may go well beyond shaping what products you buy or who you vote for. As with the field of search engine optimization, the incentive for humans to perform for AI models might shape the way people write and communicate with each other. How we express ourselves online is likely to be increasingly directed to win the attention of AIs and earn placement in the responses they return to users.

A different way forward

Much of this is discouraging, but there is much that can be done to change it.

First, it’s important to recognize that today’s AI is fundamentally untrustworthy, for the same reasons that search engines and social media platforms are.

The problem is not the technology itself; fast ways to find information and communicate with friends and family can be wonderful capabilities. The problem is the priorities of the corporations who own these platforms and for whose benefit they are operated. Recognize that you don’t have control over what data is fed to the AI, who it is shared with and how it is used. It’s important to keep that in mind when you connect devices and services to AI platforms, ask them questions, or consider buying or doing the things they suggest.

There is also a lot that people can demand of governments to restrain harmful corporate uses of AI. In the U.S., Congress could enshrine consumers’ rights to control their own personal data, as the EU already has. It could also create a data protection enforcement agency, as essentially every other developed nation has.

Governments worldwide could invest in Public AI—models built by public agencies offered universally for public benefit and transparently under public oversight. They could also restrict how corporations can collude to exploit people using AI, for example by barring advertisements for dangerous products such as cigarettes and requiring disclosure of paid endorsements.

Every technology company seeks to differentiate itself from competitors, particularly in an era when yesterday’s groundbreaking AI quickly becomes a commodity that will run on any kid’s phone. One differentiator is in building a trustworthy service. It remains to be seen whether companies such as OpenAI and Anthropic can sustain profitable businesses on the back of subscription AI services like the premium editions of ChatGPT, Plus and Pro, and Claude Pro. If they are going to continue convincing consumers and businesses to pay for these premium services, they will need to build trust.

That will require making real commitments to consumers on transparency, privacy, reliability and security that are followed through consistently and verifiably.

And while no one knows what the future business models for AI will be, we can be certain that consumers do not want to be exploited by AI, secretly or otherwise.

This essay was written with Nathan E. Sanders, and originally appeared in The Conversation.

Enoshima - Monorail - Ofuna

Tuesday, 20 January 2026 21:34
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[personal profile] mindstalk

Dunno if I'm over flu yet; since my supply of tests that can actually detect my levels ia apparently irreplacable, I'm conserving them. Feel good.

Got out, took train to Enoshima station, thinking of walking around. But there's a monorail I'd found on the map, and its station was right there -- on the 5th floor, not 2nd or 3rd like usual. I went up, found a terrace that should have a good view of Fuji, but it was cloudy.

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