Tootfinder

The combo of #dotnet run app.cs in #dotnet 10, Spectre. Console.Cli and the shebang operator make for a pretty neat development experience.
I just need #JetBrains tools to recognize script files a…

Symbolically Regressing Fish Biomass Spectral Data: A Linear Genetic Programming Method with Tunable Primitives
Zhixing Huang, Bing Xue, Mengjie Zhang, Jeremy S. Ronney, Keith C. Gordon, Daniel P. Killeen
https://arxiv.org/abs/2505.21901

Symbolically Regressing Fish Biomass Spectral Data: A Linear Genetic Programming Method with Tunable Primitives
Machine learning techniques play an important role in analyzing spectral data. The spectral data of fish biomass is useful in fish production, as it carries many important chemistry properties of fish meat. However, it is challenging for existing machine learning techniques to comprehensively discover hidden patterns from fish biomass spectral data since the spectral data often have a lot of noises while the training data are quite limited. To better analyze fish biomass spectral data, this pap…

Multi-line Spectropolarimetric Observation of Flare Ribbon Fine Structures with ViSP/DKIST
Rahul Yadav, Maria D. Kazachenko, Gianna Cauzzi, Cole A Tamburri, Marcel Corchado, Ryan French
https://arxiv.org/abs/2507.20070

Multi-line Spectropolarimetric Observation of Flare Ribbon Fine Structures with ViSP/DKIST
We present an analysis of flare ribbon fine structure observed during a GOES C2-class flare using high spatial and spectral resolution multi-line spectropolarimetric observations from the ViSP instrument at the DKIST. The ViSP recorded full Stokes spectra in three lines: Fe I 630.2 nm line pair, Na I D1, and Ca II 854.2 nm. To infer the stratification of temperature and line-of-sight (LOS) velocity across the ribbon, we performed non-LTE multi-line inversions of ViSP spectra. In the red wing of…

Spectroscopic Analysis of Pictor II: a very low metallicity ultra-faint dwarf galaxy bound to the Large Magellanic Cloud
A. B. Pace (University of Virginia), T. S. Li, A. P. Ji, J. D. Simon, W. Cerny, A. M. Senkevich, A. Drlica-Wagner, K. Bechtol, C. Y. Tan, A. Chiti, D. Erkal, C. E. Mart\'inez-V\'azquez, P. S. Ferguson, R. G. Kron, K R. Atzberger, A. Chaturvedi, J. A. Frieman, N. Kallivayalil, G. Limberg, G. E. Medina, V. M. Placco, A. H. Riley, D. J. Sand, G. S. Stringfellow,…

Spectroscopic Analysis of Pictor II: a very low metallicity ultra-faint dwarf galaxy bound to the Large Magellanic Cloud
We present Magellan/IMACS and Magellan/MIKE spectroscopy of the ultra-faint dwarf (UFD) galaxy Pictor~II (Pic~II) that is located only 12 kpc from the Large Magellanic Cloud (LMC). From the IMACS spectroscopy, we identify 13 member stars and measure a mean heliocentric velocity of $326.9\pm1.1~{\rm km~s^{-1}}$, a velocity dispersion of $3.5_{-0.9}^{+1.1}~{\rm km~s^{-1}}$, a mean metallicity of $\overline{\rm [Fe/H]}=-2.99\pm0.06$, and an upper limit on the metallicity dispersion of $σ_{\rm [Fe…

Mamdani follows in AOC’s footsteps,
having defeated an entrenched figure of the establishment with grassroots progressive support.
So this was a sweet moment.
Mamdani has received supportive words from both Senator Chuck Schumer…
And Governor Kathy Hochul…
Hopefully, formal endorsements are forthcoming.
An unintended, but hopeful consequence of Mamdani’s win is that, at 33 years old, he has inspired other young people to want to run for office themselves.…

Good News For Progressive Views The Week Of 6/20-6/26
On Tuesday, Assemblyman Zohran Mamdani shocked New York politics by defeating former Governor Andrew Cuomo in the Democratic primary for NYC mayor.

GDI
Am embarrassed to be a Brown alum here
the "voluntary" figleaf makes this _worse_ not better
To quote @…
fight, you fucking fuckers, fight.
*this is supposed to be what an endowment is for*; it's a rainy day fund, and it's fucking *flooding*

Symbolically Regressing Fish Biomass Spectral Data: A Linear Genetic Programming Method with Tunable Primitives
Zhixing Huang, Bing Xue, Mengjie Zhang, Jeremy S. Ronney, Keith C. Gordon, Daniel P. Killeen
https://arxiv.org/abs/2505.21901

Symbolically Regressing Fish Biomass Spectral Data: A Linear Genetic Programming Method with Tunable Primitives
Machine learning techniques play an important role in analyzing spectral data. The spectral data of fish biomass is useful in fish production, as it carries many important chemistry properties of fish meat. However, it is challenging for existing machine learning techniques to comprehensively discover hidden patterns from fish biomass spectral data since the spectral data often have a lot of noises while the training data are quite limited. To better analyze fish biomass spectral data, this pap…

This https://arxiv.org/abs/2406.07612 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Optical and near-infrared spectroscopy of quasars at $z>6.5$: public data release and composite spectrum
We present optical and near-infrared (NIR) spectroscopic observations for a sample of $45$ quasars at $6.50 < z \leq 7.64$ with absolute magnitudes at $1450$ Å in the range $-28.82 \leq M_{1450} \leq -24.13$ and their composite spectrum. The median redshift and $M_{1450}$ of the quasars in the sample are $z_{\rm{median}}=6.71$ and $M_{1450,\rm{median}} \simeq -26.1$, respectively. The NIR spectra are taken with echelle spectrographs, complemented with additional data from optical long slit ins…

Spectroscopic Observations of Supra-Arcade Downflows
Ryan J. French, Maria D. Kazachenko, Teodora Mihailescu, Katharine K. Reeves
https://arxiv.org/abs/2505.22624

Spectroscopic Observations of Supra-Arcade Downflows
Despite their somewhat-frequent appearance in EUV imaging of off-limb flares, the origins of Supra-Arcade Downflows (SADs) remain a mystery. Appearing as dark, tendril-like downflows above growing flare loop arcades, SADs themselves are yet to be tied into the standard model of solar flares. The uncertainty of their origin is, in part, due to a lack of spectral observations, with the last published SAD spectral observations dating back to the Solar and Heliospheric Observatory / Solar Ultraviol…