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RealStats: A Rigorous Real-Only Statistical Framework for Fake Image Detection

arXiv.org Machine Learning

As generative models continue to evolve, detecting AI-generated images remains a critical challenge. While effective detection methods exist, they often lack formal interpretability and may rely on implicit assumptions about fake content, potentially limiting robustness to distributional shifts. In this work, we introduce a rigorous, statistically grounded framework for fake image detection that focuses on producing a probability score interpretable with respect to the real-image population. Our method leverages the strengths of multiple existing detectors by combining training-free statistics. We compute p-values over a range of test statistics and aggregate them using classical statistical ensembling to assess alignment with the unified real-image distribution. This framework is generic, flexible, and training-free, making it well-suited for robust fake image detection across diverse and evolving settings.


A Generalized Adaptive Joint Learning Framework for High-Dimensional Time-Varying Models

arXiv.org Machine Learning

In modern biomedical and econometric studies, longitudinal processes are often characterized by complex time-varying associations and abrupt regime shifts that are shared across correlated outcomes. Standard functional data analysis (FDA) methods, which prioritize smoothness, often fail to capture these dynamic structural features, particularly in high-dimensional settings. This article introduces Adaptive Joint Learning (AJL), a hierarchical regularization framework designed to integrate functional variable selection with structural changepoint detection in multivariate time-varying coefficient models. Unlike standard simultaneous estimation approaches, we propose a theoretically grounded two-stage screening-and-refinement procedure. This framework first synergizes adaptive group-wise penalization with sure screening principles to robustly identify active predictors, followed by a refined fused regularization step that effectively borrows strength across multiple outcomes to detect local regime shifts. We provide a rigorous theoretical analysis of the estimator in the ultra-high-dimensional regime (p >> n). Crucially, we establish the sure screening consistency of the first stage, which serves as the foundation for proving that the refined estimator achieves the oracle property-performing as well as if the true active set and changepoint locations were known a priori. A key theoretical contribution is the explicit handling of approximation bias via undersmoothing conditions to ensure valid asymptotic inference. The proposed method is validated through comprehensive simulations and an application to Sleep-EDF data, revealing novel dynamic patterns in physiological states.


Mark Zuckerberg was initially opposed to parental controls for AI chatbots, according to legal filing

Engadget

Apple could unveil Gemini-powered Siri in Feb. Despite not wanting minors to have explicit conversations, Meta's CEO allegedly rejected this particular safety measure. Meta has faced some serious questions about how it allows its underage users to interact with AI-powered chatbots. Most recently, internal communications obtained by the New Mexico Attorney General's Office revealed that although Meta CEO Mark Zuckerberg was opposed to the chatbots having explicit conversations with minors, he also rejected the idea of placing parental controls on the feature. In its statement to the publication, Meta accused the New Mexico Attorney General of cherry picking documents to paint a flawed and inaccurate picture.


After Minneapolis shootings, California moves forward bill allowing lawsuits against federal agents

Los Angeles Times

Things to Do in L.A. Tap to enable a layout that focuses on the article. Residents confront ICE agents on Atlantic Blvd. in the city of Bell in June. This is read by an automated voice. Please report any issues or inconsistencies here . SACRAMENTO -- Amid a national uproar over the recent killing of a Minnesota man by immigration agents, the California Senate on Tuesday approved proposed legislation that would make it easier to sue law enforcement officials suspected of violating an individual's constitutional rights.


Meta allowed minors access to sex-talking chatbots despite staff concerns, lawsuit alleges

The Guardian

Filing by New Mexico's attorney general includes Meta staff emails objecting to AI companion policy Mark Zuckerberg, Meta's chief executive, approved allowing minors to access artificial intelligence chatbot companions that safety staffers warned were capable of sexual interactions, according to internal Meta documents filed in a New Mexico state court case and made public on Monday. The lawsuit - brought by the state's attorney general, Raul Torrez, and scheduled for trial next month - alleges Meta "failed to stem the tide of damaging sexual material and sexual propositions delivered to children" on Facebook and Instagram. The filing on Monday included internal Meta employee emails and messages obtained by the New Mexico attorney general's office through legal discovery. The state alleges they show that "Meta, driven by Zuckerberg, rejected the recommendations of its integrity staff and declined to impose reasonable guardrails to prevent children from being subject to sexually exploitative conversations with its AI chatbots", the attorney general said in the filing. Meta announced last week that it had removed teen access to AI companions entirely, pending creation of a new version of the chatbots.


Adobe Photoshop upgrades its Firefly-powered generative-AI editing tools

Engadget

Apple could unveil Gemini-powered Siri in Feb. Adobe Photoshop introduced some new features that are rolling out for creators today. As you'd expect from any service operator in this day and age, there's some AI involved. Adobe has improved the tools for Generative Fill, Generative Expand and Remove that are powered by its Firefly generative AI platform. Using these tools for image editing should now produce results in 2K resolution with fewer artifacts and increased detail all while delivering better matches for the provided prompts. The Reference Image option for Generative Fill has also been upgraded to deliver geometry-aware results that better match the scene.


Astronomers discover over 800 cosmic anomalies using a new AI tool

Engadget

Other discoveries included planet-forming disks viewed edge-on, galaxies with huge clumps of stars and jellyfish galaxies . Adding a bit of mystery, there were even several dozen objects that defied classification altogether. This is a fantastic use of AI to maximize the scientific output of the Hubble archive, Gómez is quoted as saying in the ESA's announcement. Finding so many anomalous objects in Hubble data, where you might expect many to have already been found, is a great result. It also shows how useful this tool will be for other large datasets.


NASA jet erupts in flames as it skids down runway at Houston airport

Daily Mail - Science & tech

America's fastest-growing state is selling the perfect lifestyle... and everyone's falling for it I was using my vape 160 times a day, it was costing me a fortune and its toll on my face was truly shocking. Then I discovered a miracle one-day cure... and stopped overnight: MARY KILLEN Lost tomb of the mysterious'cloud people' unearthed after 1,400 years in'discovery of the decade' Devastating truth about Blind Side actor Quinton Aaron: More to this'than everyone is letting on', friends reveal... as co-star Sandra Bullock'monitors' situation Harper Beckham, 14, puts on a stylish display in a fluffy coat and vintage Chanel bag as she heads out in Paris with her family... after Nicola's Peltz's heartbreaking comments about sister-in-law America's earthquake hotspot is more dangerous than feared as scientists make surprising discovery Terrifying animation shows pilot's-eye view of DC mid-air collision between airliner and helicopter that killed 67 Explosive twist in'diva' inmate Bryan Kohberger's life in prison revealed in the FREE The Crime Desk newsletter Marco Rubio'cocoons like a mummy' in bizarre strategy to hide naps from Trump Lawyer, 44, who died on flight to London after falling asleep on her mother's shoulder had undiagnosed cardiac condition, inquest hears Sydney Sweeney shows off her bombshell curves in racy lingerie to promote her new SYRN line - as it's revealed Hollywood Sign bra stunt could leave her facing trespassing and vandalism charges Truth about America's favorite pasture-raised egg brand after tests revealed what its chickens are eating and sparked huge boycotts A NASA jet skidded across a Houston runway Tuesday after a mechanical failure prevented its landing gear from deploying. Footage from Ellington Airport shows the research aircraft touching down before its belly scraped along the runway, sending sparks and flames trailing behind it. Emergency crews rushed in moments later, helping the pilot exit the aircraft as responders secured the scene, KHOU 11 News reported. NASA confirmed that all crew members are safe.


Amazon's 180 internet satellites are already too bright. It wants 3,000 more.

Popular Science

Science Space Deep Space Amazon's 180 internet satellites are already too bright. A new study determined 92% of Amazon Leo's satellites may currently impede research. Breakthroughs, discoveries, and DIY tips sent six days a week. Amazon is racing to catch up to Starlink in the battle for satellite internet dominance, and it's creating problems for everyone else. Only 180 of the proposed 3,236 Amazon Leo satellites are currently in low Earth orbit, but they're already routinely bright enough to disrupt astronomical research, according to a forthcoming study .


Lost tomb of the mysterious 'cloud people' unearthed after 1,400 years in 'discovery of the decade'

Daily Mail - Science & tech

America's fastest-growing state is selling the perfect lifestyle... and everyone's falling for it I was using my vape 160 times a day, it was costing me a fortune and its toll on my face was truly shocking. Then I discovered a miracle one-day cure... and stopped overnight: MARY KILLEN Lost tomb of the mysterious'cloud people' unearthed after 1,400 years in'discovery of the decade' Devastating truth about Blind Side actor Quinton Aaron: More to this'than everyone is letting on', friends reveal... as co-star Sandra Bullock'monitors' situation Harper Beckham, 14, puts on a stylish display in a fluffy coat and vintage Chanel bag as she heads out in Paris with her family... after Nicola's Peltz's heartbreaking comments about sister-in-law America's earthquake hotspot is more dangerous than feared as scientists make surprising discovery Terrifying animation shows pilot's-eye view of DC mid-air collision between airliner and helicopter that killed 67 Explosive twist in'diva' inmate Bryan Kohberger's life in prison revealed in the FREE The Crime Desk newsletter Marco Rubio'cocoons like a mummy' in bizarre strategy to hide naps from Trump Frozen woman who was'stiff as a rock' is found outside Texas convenience store Inside the Super Bowl hotels home to Seattle Seahawks and New England Patriots... where guests complained of cockroaches, loud noise and'being bitten' Lost tomb of the mysterious'cloud people' unearthed after 1,400 years in'discovery of the decade' It has been hailed as'the most significant archaeological discovery in a decade.' Archaeologists in Mexico have uncovered a 1,400-year-old tomb in the Central Valleys of Oaxaca that had been lost to history. The stone structure, built by the Zapotec culture, known as Be'ena'a, or'The Cloud People', is adorned with sculptures, murals and carved symbols that suggest ritual significance. The Zapotec believed their ancestors descended from the clouds and that, in death, their souls returned to the heavens as spirits.