Tootfinder

"Carbon offsets fail to cut global heating due to ‘intractable’ systemic problems, study says"
#Climate #ClimateChange

New article on the blog!
This time, it's about how I optimized an algorithm which turns byte offsets into line/column numbers and UTF-16 offsets.
Most of the performance improvement came from the use of SIMD to efficiently count ASCII characters.
#rust #RustLang #SIMD #optimization #blog

📈 Carbon offsets fail to cut global heating due to ‘intractable’ systemic problems, study says
https://www.theguardian.com/environment/2025/oct/06/carbon-offsets-fail-cut-global-heating-intractable-systemic-proble…

Carbon offsets have failed for 25 years, and most should be phased out #carbon

Carbon offsets have failed for 25 years, and most should be phased out
Academics at the University of Oxford and the University of Pennsylvania have conducted the most comprehensive review of evidence on the effectiveness on carbon offsetting to date and concluded the practice is ineffective and riddled with "intractable" problems. The review is published in the Annual Review of Environment and Resources.

Multiphase gas offsets in the atmospheres of central galaxies and their consequences for SMBH activation I. The hot and warm ionized gas phases
Francesco Ubertosi, Fabrizio Brighenti, Ewan O'Sullivan, Gerrit Schellenberger, Myriam Gitti, Simona Giacintucci, Pasquale Temi, Laurence P. David, Jan Vrtilek, Tiziana Venturi, Elisabetta Liuzzo, Marcella Massardi, Kamlesh Rajpurohit

Multiphase gas offsets in the atmospheres of central galaxies and their consequences for SMBH activation I. The hot and warm ionized gas phases
We investigate the spatial relationships between multi-phase gas components and supermassive black hole (SMBH) activity in a sample of 25 cool core galaxy groups and clusters. Using high angular resolution observations from \textit{Chandra}, VLT/MUSE, and VLBA, we robustly locate the position, respectively, of the X-ray peak of the intracluster medium (ICM), of the H$α$ peak of the warm ionized gas, and of the SMBH radio core on parsec scales. We identify spatial offsets between the X-ray peak…

European Union 27, under far right climate denialist pressure, opts for lower carbon emissions target and keeps door open for offsets beyond the EU, despite having been given a highly critical report on them.
No coverage that I can find in the UK press.
El tirón antiecológico germina en el plan contra el cambio climštico de la Unión Europea

El tirón antiecológico germina en el plan contra el cambio climático de la Unión Europea
Dos años después de que la UE forzara una histórica petición de abandonar los combustibles fósiles, la presión de los partidos negacionistas se hace notar en vísperas de la Cumbre del Clima de Brasil

Managed charging of EVs (called 'smart charging' in Europe) could save California $5 - 18 billion on distribution grid upgrades by 2040. Increased electrification (transport, buildings) offsets increased infrastructure costs by -0.2-4.5¢/kWh for all.
https://www.

Woke up super early… but have had coffee and croissants which offsets the inconvenience

An Algebraic Proof of the Nonexistence of $3\times3$ Magic Squares of Square Integers
Oscar Hill
https://arxiv.org/abs/2510.08286 https://arxiv.org/pdf/251…

An Algebraic Proof of the Nonexistence of $3\times3$ Magic Squares of Square Integers
We explore some of the properties of consecutive arithmetic progressions of odd numbers with equal sums, particularly their offsets and said sums, before using them to prove that a $3\times3$ magic square of distinct square integers does not exist.

Updated Radio Sigma-D Relation and Distances to the Shell-Like Galactic Supernova Remnants -- IV
D. Uro\v{s}evi\'c, B. Vukoti\'c, M. An{\dj}eli\'c, N. Mladenovi\'c
https://arxiv.org/abs/2510.03410

Updated Radio Sigma-D Relation and Distances to the Shell-Like Galactic Supernova Remnants -- IV
We present a new selected sample of 69 Galactic supernova remnants (SNRs) for calibration of radio $Σ-D$ relation at 1 GHz. Calibrators with the most reliable distances were selected through an extensive literature search. The calibration is performed using kernel smoothing of the selected sample of calibrators in $Σ-D$ plane and an orthogonal offsets fitting procedure. We use the obtained calibration to derive the distances to 164 Galactic SNRs and 27 new detected SNRs/SNR candidates with no…

📉 COP30: Zimbabwe's forest and energy projects reveal the downside of carbon credits
#zimbabwe

COP30: Zimbabwe's forest and energy projects reveal the downside of carbon credits
Carbon offsets are a way for companies or countries that pollute the air to "cancel out" some of their carbon emissions by funding projects that protect forests, plant trees, or provide clean energy—sometimes on the other side of the world. Polluting companies in the US, Europe, Asia or elsewhere can buy one carbon credit from a green project anywhere in exchange for emitting one metric ton of carbon dioxide (CO₂).

An improved algorithm for separating clock delays from ionospheric effects in radio astronomy
C. M. Cordun, M. A. Brentjens, H. K. Vedantham, M. Mevius
https://arxiv.org/abs/2510.01371

An improved algorithm for separating clock delays from ionospheric effects in radio astronomy
Context: Low-frequency radio observations are heavily impacted by the ionosphere, where dispersive delays can outpace even instrumental clock offsets, posing a serious calibration challenge. Especially below 100 MHz, phase unwrapping difficulties and higher-order dispersion effects can complicate the separation of ionospheric and clock delays. Aims: We address this challenge by introducing a method for reliably separating clock delays from ionospheric effects, even under mediocre to poor ionosp…

[C/N] Ages for Red Giants and their Implications for Galactic Archaeology
John D. Roberts, Marc H. Pinsonneault, Jennifer A. Johnson, Liam O. Dubay, James W. Johnson
https://arxiv.org/abs/2509.25321

[C/N] Ages for Red Giants and their Implications for Galactic Archaeology
Red giants undergo the first dredge-up, a mixing event that creates a connection between their surface [C/N] and their mass and age. We derive a [C/N]-Age relationship for red giants calibrated on APOGEE DR17 abundances and APOKASC-3 asteroseismic ages. We find that we can use [C/N] to reliably recover asteroseismic ages between 1 and 10 Gyr with average uncertainties of 1.64 Gyr. We find that [C/N] yields concordant ages, with modest offsets, for stars in different evolutionary states. We also…

Analysis of polymerized superconducting circuits
Sean Crowe, Stefan Evans, Alexei Smolyaninov
https://arxiv.org/abs/2509.18016 https://arxiv.org/pdf/2509.1…

Analysis of polymerized superconducting circuits
We apply polymer quantization, a quantization technique sometimes used in high energy physics, to several superconducting circuits including: transmons, transmission line resonators, and LC circuits. In the case of transmon qubits and transmission line resonators, experimental predictions are very close to what is found with canonical quantization, though in this approach constant charge offsets can be interpreted as quantization ambiguities. In the case of LC circuits, polymer quantization pre…

Integrated Cellular and LEO-based Positioning and Synchronization under User Mobility
Yasaman Ettefagh, Sharief Saleh, Musa Furkan Keskin, Hui Chen, Gonzalo Seco-Granados, Henk Wymeersch
https://arxiv.org/abs/2509.18727

Integrated Cellular and LEO-based Positioning and Synchronization under User Mobility
This paper investigates the localization, synchronization, and speed estimation of a mobile user equipment (UE) leveraging integrated terrestrial and non-terrestrial networks (NTNs), in particular low Earth orbit (LEO) satellites. We focus on a minimal setup in which the UE received signal from only one base station (BS) and one LEO satellite. We derive a generic signal model accounting for mobility, clock and frequency offsets, based on which a hierarchy of simplified models are proposed and o…

The GECKOS Survey: Resolved, multiphase observations of mass-loading and gas density in the galactic wind of NGC 4666
Barbara Mazzilli Ciraulo, D. B. Fisher, R. Elliott, A. Fraser-McKelvie, M. R. Hayden, M. Martig, J. van de Sande, A. J. Battisti, J. Bland-Hawthorn, A. D. Bolatto, T. H. Brown, B. Catinella, F. Combes, L. Cortese, T. A. Davis, E. Emsellem, D. A. Gadotti, C. del P. Lagos, X. Lin, A. Marasco, E. Peng, F. Pinna, T. H. Puzia, L. A. Silva-Lima, L. M. Valenzuela, G. van de Ve…

The GECKOS Survey: Resolved, multiphase observations of mass-loading and gas density in the galactic wind of NGC 4666
We present a multiphase, resolved study of the galactic wind extending from the nearby starburst galaxy NGC 4666. For this we use VLT/MUSE observations from the GECKOS program and HI data from the WALLABY survey. We identify both ionised and HI gas in a biconical structure extending to at least $z\sim$8 kpc from the galaxy disk, with increasing velocity offsets above the midplane in both phases, consistent with a multiphase wind. The measured electron density, using [SII], differs significantly…