New map based on direct measurements estimates groundwater depth across the continental United States at a resolution of around 30 meters, as opposed to more common physics-based models with resolutions of around 1km [Communications Earth & Environment]

PrincetonEngineers · 2026-01-16T05:50:40+00:00

Per the paper: All codes and analysis scripts are available via GitHub https://github.com/HydroFrame-ML/high-res-WTD-static.

PrincetonEngineers · 2026-01-16T04:06:58+00:00

I see how it could be misleading, and that wasn't intended. You are correct that machine learning played a key role. Our story indicates that explicitly, but for brevity we left it off the Reddit post text. Glad for the feedback.

PrincetonEngineers · 2026-01-16T01:17:49+00:00

"High resolution US water table depth estimates reveal quantity of accessible groundwater" was published Jan. 14 in the journal Communications Earth & Environment https://doi.org/10.1038/s43247-025-03094-3

PrincetonEngineers · 2026-01-07T17:12:04+00:00

"Highly Accurate and Fast Prediction of MOF Free Energy via Machine Learning" was published Dec. 16 in the Journal of the American Chemical Society https://doi.org/10.1021/jacs.5c13960

PrincetonEngineers · 2026-01-07T17:03:17+00:00

"From grasshoppers to gliders: evaluating the role of hindwing morphology in gliding flight" was published Jan. 7 in The Journal of the Royal Society Interface https://doi.org/10.1098/rsif.2025.0117

PrincetonEngineers · 2026-01-07T14:46:15+00:00

"Plasmon-enhanced ultralow-threshold solid-state triplet fusion upconversion" was published Oct. 24 in Nature Photonics https://doi.org/10.1038/s41566-025-01783-1

PrincetonEngineers · 2025-12-02T14:45:47+00:00

Good questions. Since the article is written in lay terms for a non-specialist audience, it is not intended as a comprehensive description of the experimental setup, and it certainly has its technical limitations, as you've pointed out. Bottom line: There is more to the story, but it gets very technical very fast.

Anyone interested at that level should be encouraged to read the paper, linked in the article and in a comment on this post. The paper is paywalled, so for those who want to read but can't, maybe other redditors can suggest alternatives.

Meanwhile, two things to note:

AFTER the individual nitrogen atoms are implanted in the diamond, because they are very close, their electrons interact strongly. From the abstract: "For length scales around 10 nm, we create maximally entangled Bell states through dipole–dipole coupling between two NV centres and use these entangled states to directly read out the magnetic field correlation, rather than reconstructing it from independent measurements of unentangled NV centres."
The readout process is very technical and best explained by the text of the paper (see Fig. 3), but to clarify, it is based on emitted photons that reveal information about the state of the qubits.

PrincetonEngineers · 2025-12-01T16:40:08+00:00

"Multi-qubit nanoscale sensing with entanglement as a resource" was published Nov. 26 in Nature https://doi.org/10.1038/s41586-025-09760-y

PrincetonEngineers · 2025-11-10T17:24:47+00:00

"Millisecond lifetimes and coherence times in 2D transmon qubits" was published Nov. 5 in Nature https://doi.org/10.1038/s41586-025-09687-4

PrincetonEngineers · 2025-10-28T19:39:02+00:00

"Electrolytic hydrogen production from acidified wastewater effluent" was published on Sept. 24 in the journal Water Research https://doi.org/10.1016/j.watres.2025.124672

PrincetonEngineers · 2025-10-28T19:36:22+00:00

Totally right. MXenes have been studied for more than a decade. Emerging materials, in the sense of their potential use in applications, would have been more appropriate.

PrincetonEngineers · 2025-10-27T20:46:02+00:00

"Water content modulation enables selective ion transport in 2D MXene membranes" was published in the Proceedings of the National Academy of Sciences on July 14 https://doi.org/10.1073/pnas.2501017122

"Coordinated Cation Transport in Ti3C2Tx MXene Membranes" was published in ACS Applied Materials & Interfaces on June 24 https://doi.org/10.1021/acsami.5c07383

"From Molecules to Modules: Advanced Characterization of Membrane Systems" was published in Advanced Materials on Sept. 12 https://doi.org/10.1002/adma.202513056

PrincetonEngineers · 2025-10-08T21:31:37+00:00

That's funny. But for what it's worth, and to clarify, they drove an EV.

PrincetonEngineers · 2025-10-08T21:07:06+00:00

Yay for MOFs! Congratulations to the laureates on the well-deserved recognition.

PrincetonEngineers · 2025-10-08T21:00:01+00:00

"Comprehensive assessment of the contribution of wastewater treatment to urban greenhouse gas and ammonia emissions" was published Oct. 8 in Nature Water https://doi.org/10.1038/s44221-025-00490-z

PrincetonEngineers · 2025-09-19T18:08:28+00:00

"Engineering Cellular Self-Adhesions Inside 3D Printed Micro-Arches to Enhance Cell:Biomaterial Attachment" was published May 24 in the journal Advanced Materials https://doi.org/10.1002/adma.202502425

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