This paper proposes an active, continual learning paradigm for Vision-Language-Action (VLA) models to address the inefficiencies of passive imitation learning. The authors demonstrate that uncertainty-guided data collection improves fine-tuning efficiency but causes catastrophic forgetting when recovery data is used exclusively.
The article introduces DiT-Reward, a method that converts a pretrained text-to-image Diffusion Transformer into a reward model by processing near-clean image latents and aggregating text-conditioned representations across transformer layers. This approach leverages generative representations to evaluate the quality of generated images without requiring separate training objectives.
The article demonstrates that Muown's directional update is equivalent to a Riemannian step on normalized directions, where the un-normalized parameterization magnitude modulates the angular step size. This insight explains Muown's step-size stability and motivates the development of AngularMuown, which optimizes directly over normalized directions with an explicit, schedulable angular multiplier.
The authors propose a method to transform inherently sparse outcome rewards in reinforcement learning into dense process rewards by training a discriminator to distinguish between successful and unsuccessful episodes. This approach incentivizes the policy to match the state-action visitations of successful episodes while avoiding those of unsuccessful ones, providing dense feedback on progress without altering the optimal policy.
Hack Your Summer is a free, four-week high-velocity production sprint designed for undergraduate students, graduate students, and recent graduates to build tangible, public-facing work. The initiative serves as an alternative to traditional internships amid a crisis of reduced internship availability in the US.
Jon Udell argues against the phrase "human in the loop" because it cedes authority to machines, proposing instead that humans should invite agents into their existing workflows as team members.
Neofold is an idle creature-collector game that utilizes a local diffusion model to generate an infinite variety of pets. The title was recently released and is available on Steam.
This paper demonstrates that diffusion models' ability to exploit low-dimensional structure for accelerated sampling is a robust property independent of specific update coefficient choices. The authors prove that a broad class of coefficients allows generating an ε-accurate sample in O(k/ε) iterations, regardless of ambient dimension.
This article introduces a framework for sequentially approximating functions in slowly-varying sequences, leveraging the reuse of past queries to reduce overall computational cost. The authors present novel sequential estimation results for matrix powers, spectral densities, Monte Carlo integration, and partial differential equation boundary value problems.
The article introduces Action-BED, a new framework for Bayesian experimental design that formulates the problem in terms of expected future loss on downstream actions rather than uncertainty reduction. This approach converts traditionally doubly intractable objectives into singly intractable ones that can be jointly optimized using stochastic gradients.
This study systematically investigates the impact of system-prompt optimization on multi-agent systems (MAS) by benchmarking two optimizers across diverse configurations of tasks, workflows, and team sizes.
This paper argues that Large Language Models are not universal problem solvers through prompting alone, due to fundamental constraints in language as a communication interface and alignment requirements. The authors analyze user-system interaction as a cheap-talk game to derive PAC-Bayes bounds distinguishing estimation error from structural limitations.
The article introduces Tapered Language Models (TLMs), an architectural principle that allocates more parameter capacity to earlier layers and less to later layers within a fixed budget. This approach challenges the standard practice of uniform layer width by leveraging evidence that later layers primarily refine the residual stream rather than transforming it.
This study introduces PsyBridge, a hybrid intelligent framework designed to address the limitations of isolated mental health screening tools by integrating clinically validated assessments with cognitive and personality profiling. The system utilizes a modular architecture and weighted aggregation mechanism to generate interpretable risk classifications and decision support recommendations.
This article addresses the lack of rigorous convergence theory for the AdamW optimizer in regimes with heavy-tailed stochastic gradient noise, which is common in large language model pretraining. It questions whether AdamW can converge under these conditions or if its second-moment accumulator creates a genuine obstruction.
This article introduces Semantic Browsing, a method for generating controlled diversity in text-to-image models by enforcing structure on generated samples to overcome the lack of meaningful variation in current systems. The approach induces diversity directly at the text level rather than relying on stochastic variations within the model.
A user successfully utilized the MiMo-V2.5-GGUF model to write a built-in llama.cpp tool for executing C++ code and retrieving results. The implementation was achieved using opencode, where the model generated the necessary code based on specific instructions.
The author observes that the majority of fine-tuned models uploaded to Hugging Face perform worse than their base counterparts, rendering them useless. This proliferation is attributed to individuals using these models as a form of professional credentialing to secure high-paying AI positions.
The llama.cpp project has released version b9835, which includes a fix for the stop and reasoning skip functionality in single-model mode. This update addresses specific issues within the user interface to improve control during model inference.
A user has shared a Bash script designed to parse the verbose output of llama.cpp, providing a clear summary of VRAM/RAM requirements and runtime performance metrics. This tool addresses the difficulty of predicting memory needs for various model quantizations by grouping buffer allocations by function and backend.