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Program-as-Weights: A Programming Paradigm for Fuzzy Functions

Turning vague instructions into tiny, reusable AI programs that run locally

Researchers built a system that compiles natural-language descriptions into small neural programs that can run on ordinary computers without calling cloud APIs. A tiny 600-million-parameter interpreter running these programs matches the output quality of a 32-billion-parameter model, while using 50 times less memory and running 30 times faster on a MacBook.

Tasks like filtering log files or ranking search results currently require paid API calls to large language models every single time. This approach lets you define the function once and then run it repeatedly on your own machine—cheaper, faster, and without sending data to the cloud. It's especially valuable for teams who need reproducible results or can't rely on internet access.

Invariance Entropy in the Dust

Why two ways of measuring control system complexity give different answers

A fifteen-year-old mathematical puzzle about control systems has been solved: two seemingly equivalent ways of measuring how much information is needed to keep a system on track actually give different results. The researchers built a clever example that reveals the discrepancy, showing that one measure can be infinite while the other remains finite, and that small changes to the starting conditions can cause unexpected jumps in complexity.

Control systems steer everything from robots to aircraft, and understanding their information complexity helps engineers design more efficient controllers. This result corrects a long-standing misconception about which mathematical tools actually measure the same thing, preventing researchers from accidentally using interchangeable definitions that aren't interchangeable. It also reveals a new source of complexity that arises not from the system spreading apart dynamically, but from the geometry of the constraints themselves.

Liquidity Premium and Investment Horizons

Why stocks with thin trading volumes pay higher returns later

When fewer investors are buying or selling a stock, prices move more dramatically with each trade—a cost called the liquidity premium that investors demand as compensation. Researchers found they could predict which stocks would outperform by measuring daily order flow and how much prices swing around it, using 2020–2025 stock data. The finding suggests the premium isn't just about risk, but about how trading scarcity temporarily depresses prices and then corrects itself.

Portfolio managers and algorithmic traders can use order-flow measurements to identify underpriced stocks before the liquidity bounce occurs, potentially improving returns. Understanding that liquidity costs drive part of the return premium—rather than fundamental risk—helps investors distinguish between genuinely risky stocks and merely illiquid ones, leading to better capital allocation decisions.

LACUNA: A Testbed for Evaluating Localization Precision for LLM Unlearning

Checking whether AI models actually forget sensitive data or just hide it

Researchers created a test to see if methods that remove sensitive information from AI models actually erase it from the model's internal parameters or merely hide it. They found that current state-of-the-art methods perform well on surface-level tests but are imprecise when examined at the parameter level and remain vulnerable to attacks that try to resurrect the forgotten information.

As AI companies face legal and ethical pressure to remove personal data from trained models, this work reveals a critical gap: methods that appear to work often fail when tested thoroughly. Getting unlearning right matters because incomplete removal of sensitive data like social security numbers or health records could expose people to privacy breaches, and regulators need reliable ways to verify that deletion actually happened.

Quantum mutual information as a robust probe of integrability in open quantum systems

A new tool for telling orderly from chaotic quantum systems that actually works with noise

Physicists have found a new way to tell whether a quantum system behaves in an orderly, predictable way or descends into chaos — and it works even when the system is exposed to environmental noise. The approach, based on measuring quantum correlations between particles, outperforms the standard method in certain noisy conditions, especially when the noise has a memory effect that lets quantum information leak back into the system.

Understanding whether quantum systems are orderly or chaotic determines how well we can control them and predict their behavior — critical for quantum computers and quantum sensors. Current methods for making this distinction break down when real-world noise enters the picture, but this new approach keeps working in some realistic noise scenarios, making it more practical for distinguishing system types in actual experiments and devices.

Behind the Refusal: Determining Guardrail Activation via Behavioral Monitoring

How to tell when an AI's safety filter blocks you versus the AI itself

Researchers developed the first method to detect whether an AI system has guardrails installed and what it's designed to block, using only external behavioral clues like response timing and structure. By monitoring how an AI system responds to harmful requests, they achieved 100% accuracy at detecting guardrails and 98% accuracy at distinguishing a guardrail block from an AI's own refusal—a distinction attackers need to make to choose the right hacking technique.

As AI systems deploy into banks, hospitals, and military applications, security teams need to know what guardrails protect their systems and how well they work. This method lets defenders audit their own defenses without needing access to internal code. It also reveals how attackers would probe a live AI system, so security teams can spot reconnaissance attempts in real time.

Towards Robustness against Typographic Attack with Training-free Concept Localization

Why AI vision systems get tricked by random text in images—and how to fix it

AI vision models trained on paired images and text can be fooled by irrelevant words appearing within photos, causing them to misidentify what they're actually seeing. Researchers found which parts of these models are responsible for this weakness and showed that simple, no-retraining fixes applied directly to those components can substantially restore accuracy, even when text clutter is deliberately added to images.

Autonomous vehicles and other safety-critical systems rely on these vision models to understand their surroundings. Stickers, graffiti, or any text in a scene could currently cause dangerous misidentifications—a stop sign misread as something else, for example. This method fixes the vulnerability without requiring expensive retraining, making it practical to deploy immediately in existing systems.

Conformal Bayes for Two-Sided Censored Gaussian Regression under Label Shift

Making predictions when some measurements are hidden at the edges

When real-world measurements get cut off at upper or lower limits—like income surveys that cap responses or medical tests that max out—standard prediction methods fail. Researchers developed a new statistical approach that handles these artificially truncated datasets while also accounting for shifts in what you're trying to predict, producing smaller prediction ranges without sacrificing accuracy.

Many real datasets have built-in boundaries: household income surveys that don't record above a threshold, medical tests with detection limits, or equipment readings that plateau. This method lets analysts make reliable predictions from such data without either throwing information away or pretending the boundaries don't exist. It's particularly useful when the relationship between data source and real-world conditions has shifted, a common problem when applying models trained on one dataset to different populations.

Robust Transmission Design for RIS-Assisted RSMA-SWIPT Systems With Movable Antennas Under Hardware Distortions

Making wireless power and data transfer work reliably with imperfect equipment

Engineers designed a system that simultaneously transmits information and wireless power to multiple users while accounting for two real-world problems: incomplete knowledge of signal conditions and hardware that doesn't perform perfectly. The system uses movable antennas and intelligent reflective surfaces to adapt continuously, achieving higher data rates even when conditions are uncertain or equipment degrades.

Wireless power transfer could charge devices without cables, but only works if transmitters can adjust to real equipment limitations and incomplete information about signal paths. This framework makes that adjustment automatic and robust, bringing practical wireless power systems closer to viability for phones, sensors, and remote devices that can't be recharged manually.

Understanding the Robustness of Distributed Self-Supervised Learning Frameworks Against Non-IID Data

Why some AI learning methods handle messy, uneven data better than others

When machine learning systems train across many devices with mismatched data, some approaches fail badly while others hold up. This paper proves that a technique called Masked Image Modeling outperforms Contrastive Learning on fragmented data, and that better-connected networks learn more reliably. The researchers also introduced a refined training method that improves robustness in real deployments.

Companies and researchers increasingly train AI on decentralized data—from hospitals sharing patient images without centralizing them, to phones learning from local photos. This work provides concrete guidance on which methods won't collapse when data is unevenly distributed, plus a practical technique that improves reliability. That directly reduces the risk of failed deployments in privacy-sensitive or logistically complex settings.

Stationary covariance spectra of discrete-time non-normal random recurrent dynamics

Why brain-inspired networks behave differently than math predicts

Brain-inspired artificial networks don't follow the simple mathematical rules that scientists expected. A new mathematical approach reveals how noise ripples through these networks in unexpected ways, showing that the randomness in how neurons connect matters far more than previous theory suggested.

Neuroscientists use these artificial networks to understand how real brains process information by comparing network behavior to actual brain recordings. Without knowing how these networks truly distribute activity across their components, researchers can't tell whether their models actually capture real brain dynamics or just produce superficially similar results. This work provides the missing mathematical foundation to make those comparisons meaningful.

Refinement of Reliability Grid Codes in the Provision of Ancillary Services

Finding the right safety bar for wind farms selling emergency power

Denmark's grid operator requires wind farms and other unpredictable power sources to guarantee they can deliver emergency reserves 90% of the time — but that threshold was never actually optimized. Researchers built a model to find the true cost-reliability sweet spot and discovered the standard could drop to around 85% without sacrificing grid safety, cutting costs by up to 14.5%.

As grids add more wind and solar, they rely increasingly on these uncertain sources for emergency backup power. Setting reliability rules too high wastes money; too low risks blackouts. This work provides a concrete method to find the actual optimal threshold instead of guessing — potentially saving millions in grid costs across Europe's renewable-heavy systems while maintaining the same safety margin.