Tootfinder

Root Cause Analysis of Hydrogen Bond Separation in Spatio-Temporal Molecular Dynamics using Causal Models
Rahmat K. Adesunkanmi, Ashfaq Khokhar, Goce Trajcevski, Sohail Murad
https://arxiv.org/abs/2508.12500

Root Cause Analysis of Hydrogen Bond Separation in Spatio-Temporal Molecular Dynamics using Causal Models
Molecular dynamics simulations (MDS) face challenges, including resource-heavy computations and the need to manually scan outputs to detect "interesting events," such as the formation and persistence of hydrogen bonds between atoms of different molecules. A critical research gap lies in identifying the underlying causes of hydrogen bond formation and separation -understanding which interactions or prior events contribute to their emergence over time. With this challenge in mind, we propose leve…

A new idea about how to make clean Hydrogen that fits into an existing industry? ✨🌱💧
Clean Hydrogen🌱💧 will be more difficult than we might've hoped, but we still need it. Just decarbonizing the fossil🦖 Hydrogen industry is a massive undertaking. New ideas are welcome.
I recently learned about Peregrine Hydrogen. They make Hydrogen, but also something else: Sulfuric Acid🧪. They need ~½ the electricity⚡ compared to conventional electrolysis by utilizing a 2nd input.
🧵

This Hydrogen has no Color
Peregrine Hydrogen has an unusual idea for making clean Hydrogen, one that it says fits into existing industrial processes. One of the world's largest Phosphate mining companies is interested.

Towards the Coordination and Verification of Heterogeneous Systems with Data and Time
Tim Kr\"auter, Adrian Rutle, Yngve Lamo, Harald K\"onig, Francisco Dur\'an
https://arxiv.org/abs/2508.12325

Towards the Coordination and Verification of Heterogeneous Systems with Data and Time
Modern software systems are often realized by coordinating multiple heterogeneous parts, each responsible for specific tasks. These parts must work together seamlessly to satisfy the overall system requirements. To verify such complex systems, we have developed a non-intrusive coordination framework capable of performing formal analysis of heterogeneous parts that exchange data and include real-time capabilities. The framework utilizes a linguistic extension, which is implemented as a central b…

Scaling green hydrogen and CCUS via cement-methanol co-production in China
Yuezhang He, Hongxi Luo, Yuancheng Lin, Carl J. Talsma, Anna Li, Zhenqian Wang, Yujuan Fang, Pei Liu, Jesse D. Jenkins, Eric Larson, Zheng Li
https://arxiv.org/abs/2509.13674

Scaling green hydrogen and CCUS via cement-methanol co-production in China
High costs of green hydrogen and of carbon capture, utilization, and sequestration (CCUS) have hindered policy ambition and slowed real-world deployment, despite their importance for decarbonizing hard-to-abate sectors, including cement and methanol. Given the economic challenges of adopting CCUS in cement and green hydrogen in methanol production separately, we propose a renewable-powered co-production system that couples electrolytic hydrogen and CCUS through molecule exchange. We optimize sy…

HeteroRAG: A Heterogeneous Retrieval-Augmented Generation Framework for Medical Vision Language Tasks
Zhe Chen, Yusheng Liao, Shuyang Jiang, Zhiyuan Zhu, Haolin Li, Yanfeng Wang, Yu Wang
https://arxiv.org/abs/2508.12778

HeteroRAG: A Heterogeneous Retrieval-Augmented Generation Framework for Medical Vision Language Tasks
Medical large vision-language Models (Med-LVLMs) have shown promise in clinical applications but suffer from factual inaccuracies and unreliable outputs, posing risks in real-world diagnostics. While retrieval-augmented generation has emerged as a potential solution, current medical multimodal RAG systems are unable to perform effective retrieval across heterogeneous sources. The irrelevance of retrieved reports affects the factuality of analysis, while insufficient knowledge affects the credib…

Electron Ptychography Images Hydrogen Atom Superlattices and 3D Inhomogeneities in Palladium Hydride Nanoparticles
Zixiao Shi, Qihao Li, Himani Mishra, Desheng Ma, H\'ector D. Abru\~na, David A. Muller
https://arxiv.org/abs/2508.11142

Electron Ptychography Images Hydrogen Atom Superlattices and 3D Inhomogeneities in Palladium Hydride Nanoparticles
When hydrogen atoms occupy interstitial sites in metal lattices, they form metal hydrides (MHx), whose structural and electronic properties can differ significantly from the host metals. Owing to the small size of hydrogen atom and its unique interactions with the host metal, MHx is of broad interest in both fundamental science and technological applications. Determining where the hydrogen is located within the MHx, and whether it orders on the partially occupied interstitial sites is crucial f…

Today, millions of Americans and their allies turned out across the United States and around ... (Heather Cox Richardson/Letters from an American)
https://heathercoxrichardson.substack.com/p/october-18-2025
http://www.memeorandum.com/251018/p56#a251018p56

Time-Varying Heterogeneous Treatment Effects in Event Studies
Irene Botosaru, Laura Liu
https://arxiv.org/abs/2509.13698 https://arxiv.org/pdf/2509.13698…

Time-Varying Heterogeneous Treatment Effects in Event Studies
This paper examines the identification and estimation of heterogeneous treatment effects in event studies, emphasizing the importance of both lagged dependent variables and treatment effect heterogeneity. We show that omitting lagged dependent variables can induce omitted variable bias in the estimated time-varying treatment effects. We develop a novel semiparametric approach based on a short-T dynamic linear panel model with correlated random coefficients, where the time-varying heterogeneous …

July 18, 2025 -- [There is a lot about sexual assault in tonight's letter.] (Heather Cox Richardson/Letters from an American)
https://heathercoxrichardson.substack.com/p/july-18-2025
http://www.memeorandum.com/250719/p22#a250719p22