January 2026

Have I discovered a SOTA probabilistic value head loss?

Have I discovered a SOTA probabilistic value head loss?

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…or have I made some kind of critical mistake somewhere? A while ago, I made a post here discussing techniques for optimizing a value head that predicts both the mean and the variance of values from a given state. I was having some trouble, and had looked at a few papers but found no solutions that performed adequately on even a quite simple toy environment, consisting of three ‘doors’ leading to next-states with unique reward distributions. The first […]

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Claude’s new constitution

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Claude’s new constitution Late last year Richard Weiss found something interesting while poking around with the just-released Claude Opus 4.5: he was able to talk the model into regurgitating a document which was not part of the system prompt but appeared instead to be baked in during training, and which described Claude’s core values at great length. He called this leak the soul document, and Amanda Askell from Anthropic quickly confirmed that it was indeed part of Claude’s […]

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Judge orders stop to FBI search of devices seized from Washington Post reporter

Judge orders stop to FBI search of devices seized from Washington Post reporter

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A federal judge today ordered the US government to stop searching devices seized from the house of a Washington Post reporter. It may be only a temporary reprieve for the Post and reporter Hannah Natanson, however. Further proceedings will be held on whether the search can resume or whether the government must return the devices. Natanson herself isn’t the subject of investigation, but the FBI executed a search warrant at her home and seized her work and personal […]

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Machine learning-enhanced non-amnestic Alzheimer’s disease diagnosis from MRI and clinical features

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Alzheimer’s disease (AD), defined as an abnormal buildup of amyloid plaques and tau tangles in the brain can be diagnosed with high accuracy based on protein biomarkers via PET or CSF analysis. However, due to the invasive nature of biomarker collection, most AD diagnoses are made in memory clinics using cognitive tests and evaluation of hippocampal atrophy based on MRI. While clinical assessment and hippocampal volume show high diagnostic accuracy for amnestic or typical AD (tAD), a substantial […]

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Millions of people imperiled through sign-in links sent by SMS

Millions of people imperiled through sign-in links sent by SMS

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Websites that authenticate users through links and codes sent in text messages are imperiling the privacy of millions of people, leaving them vulnerable to scams, identity theft, and other crimes, recently published research has found. The links are sent to people seeking a range of services, including those offering insurance quotes, job listings, and referrals for pet sitters and tutors. To eliminate the hassle of collecting usernames and passwords—and for users to create and enter them—many such services […]

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Apple’s Siri Could Get a Full AI Chatbot Makeover Next Year

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Apple’s dream of an AI-powered Siri might finally become true. In fact, the Cupertino giant is looking to change the narrative around Siri by overhauling it into an AI chatbot, similar to Google’s Gemini. That’s according to prominent Apple tipster and Bloomberg reporter, Mark Gurman. Apple is reportedly rebuilding Siri as an AI chatbot In his report from earlier today, Gurman mentions that Apple has plans to turn the voice assistant into a full-fledged AI chatbot. Well, the […]

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DS@GT at TREC TOT 2025: Bridging Vague Recollection with Fusion Retrieval and Learned Reranking

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We develop a two-stage retrieval system that combines multiple complementary retrieval methods with a learned reranker and LLM-based reranking, to address the TREC Tip-of-the-Tongue (ToT) task. In the first stage, we employ hybrid retrieval that merges LLM-based retrieval, sparse (BM25), and dense (BGE-M3) retrieval methods. We also introduce topic-aware multi-index dense retrieval that partitions the Wikipedia corpus into 24 topical domains. In the second stage, we evaluate both a trained LambdaMART reranker and LLM-based reranking. To support model […]

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mRNA cancer vaccine shows protection at 5-year follow-up, Moderna and Merck say

mRNA cancer vaccine shows protection at 5-year follow-up, Moderna and Merck say

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In a small clinical trial, customized mRNA vaccines against high-risk skin cancers appeared to reduce the risk of cancer recurrence and death by nearly 50 percent over five years when compared with standard treatment alone. That’s according to Moderna and Merck, the two pharmaceutical companies that have collaborated on the experimental cancer vaccine, called intismeran autogene (mRNA-4157 or V940). So far, the companies have only reported the top-line results in a press release this week. However, the results […]

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Data-driven Lake Water Quality Forecasting for Time Series with Missing Data using Machine Learning

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Volunteer-led lake monitoring yields irregular, seasonal time series with many gaps arising from ice cover, weather-related access constraints, and occasional human errors, complicating forecasting and early warning of harmful algal blooms. We study Secchi Disk Depth (SDD) forecasting on a 30-lake, data-rich subset drawn from three decades of in situ records collected across Maine lakes. Missingness is handled via Multiple Imputation by Chained Equations (MICE), and we evaluate performance with a normalized Mean Absolute Error (nMAE) metric for […]

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Trump FCC threatens to enforce equal-time rule on late-night talk shows

Trump FCC threatens to enforce equal-time rule on late-night talk shows

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The Federal Communications Commission today issued a warning to late-night and daytime talk shows, saying these shows may no longer qualify for an exemption to the FCC’s equal-time rule. Because the FCC is chaired by vocal Trump supporter Brendan Carr, changing how the rule is enforced could pressure shows into seeking out more interviews with Republican candidates. The public notice providing what the FCC calls “guidance on political equal opportunities requirement for broadcast television stations” appears to be […]

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