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COBRA2026: a large-scale multicenter pelvic cone-beam computed tomography projection dataset
Adrian Thummerer, Simon Rit, Florian Kamp, Matteo Maspero, Martjin P. W. Intven, Thomas G. Bon\'e, Christopher Kurz, Guillaume Landry, Thomas Baudier, Mustafa Kadhim, Julius Arnold, Michael Rauter, Barbara Kn\"ausl, Lukas Zimmermann
https://arxiv.org/abs/2607.20037 https://arxiv.org/pdf/2607.20037 https://arxiv.org/html/2607.20037
arXiv:2607.20037v1 Announce Type: new
Abstract: The COBRA2026 dataset is a large-scale, multicenter resource of raw radiotherapy cone-beam computed tomography (CBCT) acquisitions created for the development and evaluation of conventional and learning-based reconstruction and image-correction methods. It contains data from 867 patients undergoing pelvic radiotherapy at six European centers, acquired using Elekta and Varian imaging systems. For each case, the dataset includes raw projection data, acquisition geometry, calibration and correction information, clinically reconstructed CBCT images, and corresponding planning CT images. Vendor-specific files were anonymized and converted into open formats. Planning CT images were deformably registered to the daily CBCT anatomy, and matched projections were simulated using the corresponding acquisition geometry. All cases underwent visual quality control, and cases with substantial processing or registration errors were excluded. The approximately 950 GB dataset is divided into training, validation, and test sets containing 692, 52, and 123 cases, respectively. Projection stacks and volumetric images are provided as compressed MetaImage files, with geometry and metadata supplied in XML and YAML formats. COBRA2026 supports research on full- and sparse-view reconstruction, low-dose imaging, artifact and scatter correction, motion compensation, and synthetic CT generation. The dataset is released under the CC BY-NC 4.0 license, indexed on Zenodo (doi:10.5281/zenodo.21322350), and accompanied by openly available preprocessing and baseline reconstruction code. It also forms the basis of the COBRA2026 reconstruction challenge.
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"UK Government greenlights 3GW Dogger Bank offshore wind project"
#UK #UnitedKingdom #Energy #WindTurbines

UK Government greenlights 3GW Dogger Bank offshore wind project
Planning permission has been approved for two Dogger Bank offshore wind farms totalling 3GW in capacity, as well as a 1GW wind farm off the east coast of England.

A structural reduction for the symmetric hit problem in four variables
Dang Vo Phuc
https://arxiv.org/abs/2606.02626 https://arxiv.org/pdf/2606.02626 https://arxiv.org/html/2606.02626
arXiv:2606.02626v1 Announce Type: new
Abstract: Let $\mathcal{A}$ be the mod $2$ Steenrod algebra, and $P(n) = \mathbb{F}_2[x_1, \dots, x_n]$ be the polynomial algebra viewed as an unstable module over $\mathcal{A}$. The symmetric hit conjecture asks whether the symmetrization of a hit monomial in $P(n)$ is always hit in the symmetric invariant subalgebra $B(n) = P(n)^{\Sigma_n}$. While resolved for $n \leq 3$, the case $n=4$ presents significant obstructions due to combinatorial complexity, orbit cancellations intrinsically tied to $\Sigma_4$-stabilizers, and the emergence of strongly spike-free survivor modules. This paper introduces a conditional structural reduction to overcome these obstructions in the domain where the numerical weight satisfies $\mu(d) \leq 4$. By integrating Walker-Wood duality with a new $\Sigma_4$-stabilizer parity analysis, we reduce the global conjecture to localized algebraic conditions: a symmetric lower-spike reduction and a strengthened four-row digital-engineering hypothesis. Assuming these inputs, the conjecture follows by lexicographic induction on the column-sum and row-sum sequences of the binary exponent matrices.
Our approach isolates the four-variable repeated-row anomaly into exact local identities, utilizing global Steenrod-kernel functionals lifted from local spike-free quotients to detect potential survivor elements. Finally, we provide explicit monomial-level computations in degrees $8$, $12$, and $14$, explicitly illustrating the stabilizer mechanism in practice and framing the precise algebraic identities required for a future unconditional proof.
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Paris-based Audion, which offers a platform for planning and optimizing ad campaigns for audio, raised a $15M Series B, bringing its total funding to $22.6M (Kerry Flynn/Axios)
https://www.axios.com/2026/04/27/audion-audio-adtech-raises-us

Exclusive: Audion raises $15M, plans U.S. expansion
The ad tech platform processes 500,000 hours of audio a week.

This summer is shaping up to be an expensive and uncertain time to fly, especially if you’re planning a European vacation.
Volatile fuel prices because of the war in Iran are straining airlines around the globe,
but perhaps nowhere as much as in Europe,
where jet fuel supplies could run low by mid-May.
European airlines like Lufthansa and KLM have announced they are cutting flights,
and others could follow.
Carriers everywhere are increasingly passing cost…

How Jet Fuel Shortages Could Affect Summer Travel to Europe and Beyond
Facing sky-high fuel costs linked to the war in Iran, airlines are cutting routes and raising prices. European vacations are looking a lot less affordable.

RE: #spaceX #opeanAI #anthropic #ipo