The path to better plastics: Our progress and partnerships

The path to better plastics: Our progress and partnerships

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The path to better plastics: Our progress and partnerships How Amazon is helping transform plastics through innovation in materials, recycling technology, sortation, and more. Sustainability Alan Jacobsen May 12, 11:47 AM May 12, 11:47 AM In 2022, we shared our vision for transforming plastics through an innovative collaboration with the U.S. Department of Energy’s BOTTLE Consortium. Today, that vision is advancing from laboratory concept to commercial trials. Through work with our partners from material scientists to recycling facilities […]

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Attention-gated U-Net model for semantic segmentation of brain tumors and feature extraction for survival prognosis

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arXiv:2602.15067v1 Announce Type: new Abstract: Gliomas, among the most common primary brain tumors, vary widely in aggressiveness, prognosis, and histology, making treatment challenging due to complex and time-intensive surgical interventions. This study presents an Attention-Gated Recurrent Residual U-Net (R2U-Net) based Triplanar (2.5D) model for improved brain tumor segmentation. The proposed model enhances feature representation and segmentation accuracy by integrating residual, recurrent, and triplanar architectures while maintaining computational efficiency, potentially aiding in better treatment planning. The proposed method achieves […]

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Training Qwen2.5-0.5B-Instruct on Reddit post summarization with GRPO on my 3x Mac Minis - using combination of quality rewards

Training Qwen2.5-0.5B-Instruct on Reddit post summarization with GRPO on my 3x Mac Minis – using combination of quality rewards

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Training Qwen2.5-0.5B-Instruct on Reddit post summarization with GRPO on my 3x Mac Minis — trying combination of quality rewards with length penalty! So, with this project I want to see if a length constrained (like 64 tokens only) quality summarization can be done by tiny LLMs using GRPO! Why combination of quality rewards? ROUGE-L only cares about the longest common subsequence — it misses synonyms and paraphrases entirely. METEOR handles both: it aligns tokens with synonym matching via […]

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Business Operations Management Evolves: Employees Now Work for Systems

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In the traditional workplace, operations managers drove business success. They were the brains behind business processes, as Frederick Taylor famously explained. Managers were the business analytics engine, the logistics designer, and the quality control mechanism. But in the modern workplace, a new approach to business management is emerging. Many companies — some without realizing it — are implementing changes in the business environment that shift power to a new type of manager.  “Managers used to organize work, but […]

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Final reminder: Donate to win swag in our annual Charity Drive sweepstakes

Final reminder: Donate to win swag in our annual Charity Drive sweepstakes

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If you’ve been too busy replaying all of Ars’ top games of 2025 to take part in this year’s Ars Technica Charity Drive sweepstakes, don’t worry. You still have until the end of the day to donate to a good cause and get a chance to win your share of over $4,000 worth of swag (no purchase necessary to win). So far in this year’s charity drive, over 450 readers have contributed nearly $38,000 to either the Electronic […]

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Godot 4.3 RC 2: The Safe Fixes

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We entered the Release Candidate stage in the Godot 4.3 development cycle a week ago with 4.3 RC 1, which means that all features are in place, the most critical regressions have been tackled, and we’re confident that it’s now ready for general use in the vast majority of cases. A lot of users have been testing the RC 1 snapshot, reporting issues, many of which could be fixed. In the meantime, we’ve kept working on a few […]

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Reverse-Robust Computation with Chemical Reaction Networks

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arXiv:2604.14355v1 Announce Type: new Abstract: Chemical reaction networks, or CRNs, are known to stably compute semilinear Boolean-valued predicates and functions, provided that all reactions are irreversible. However, this property does not hold for wet-lab implementations, as all chemical reactions are reversible, even at very slow rates. We study the computational power of CRNs under the reverse-robust computation model, where reactions are permitted to occur either in forward or in reverse up to a cutoff point, after which they […]

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New ways to buy ChatGPT ads

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OpenAI expands ChatGPT ads with a beta self-serve Ads Manager, CPC bidding, and enhanced measurement tools—built to protect privacy and keep conversations separate from ads.

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Use Amazon Quick Suite custom action connectors to upload text files to Google Drive using OpenAPI specification

Use Amazon Quick Suite custom action connectors to upload text files to Google Drive using OpenAPI specification

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Many organizations need to manage file uploads across different cloud storage systems while maintaining security and compliance. Although Google Drive provides APIs for integration, organizations often don’t have the technical experts to interact with these APIs directly. Organizations need an intuitive way to handle file uploads using natural language, without requiring specialized knowledge of the underlying systems or APIs. Amazon Quick Suite is an enterprise AI platform that provides generative AI-powered capabilities for workplace productivity and business intelligence. […]

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“It doesn't feel safe”—Many international game developers plan to skip GDC in US

“It doesn’t feel safe”—Many international game developers plan to skip GDC in US

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This week, tens of thousands of game developers and producers will once again gather in San Francisco, as they have since 1988, for the weeklong Game Developers Conference. But this year’s show will be missing many international developers who say they no longer feel comfortable traveling to the United States to attend, no matter how relevant the show is to their work and careers. Dozens of those developers who spoke to Ars in recent months say they’re wary […]

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