Tootfinder

The limits of cosmology
Joseph Silk
https://arxiv.org/abs/2509.08066 https://arxiv.org/pdf/2509.08066

The limits of cosmology
The Moon is our future. It may seem like a chimera with a projected cost in excess of 100 billion\$, and counting, dispensed on ARTEMIS with little to show to date. However it is the ideal site for the largest telescopes that we can dream about, at wavelengths spanning decimetric radio through optical to terahertz FIR. And it is these future telescopes that will penetrate the fundamental mysteries of the first hydrogen clouds, the first stars, the first galaxies, the first supermassive black ho…

A Neural Network Approach to Multi-radionuclide TDCR Beta Spectroscopy
Li Yi, Qian Yang
https://arxiv.org/abs/2509.03137 https://arxiv.org/pdf/2509.03137…

A Neural Network Approach to Multi-radionuclide TDCR Beta Spectroscopy
Liquid scintillation triple-to-doubly coincident ratio (TDCR) spectroscopy is widely adopted as a standard method for radionuclide quantification because of its inherent advantages such as high precision, self-calibrating capability, and independence from radioactive reference sources. However, multiradionuclide analysis via TDCR faces the challenges of limited automation and reliance on mixture-specific standards, which may not be easily available. Here, we present an Artificial Intelligence (…

FRB 20250316A - A Brilliant and Nearby One-off #FastRadioBurst Localized to 13 pc Precision: https://iopscience.iop.org/article/10.3847/2041-8213/adf62f -> Physical properties provided by Keck Observatory data reveals surprising FRB environment / Origin of Mysterious Radio Signal Possibly Discovered: https://keckobservatory.org/rbfloat/ / https://www.cfa.harvard.edu/news/origin-mysterious-radio-signal-possibly-discovered

Hubble constant constraint using 117 FRBs with a more accurate probability density function for ${\rm DM}_{\rm diff}$
Jiaming Zhuge, Marios Kalomenopoulos, Bing Zhang
https://arxiv.org/abs/2508.05161

Hubble constant constraint using 117 FRBs with a more accurate probability density function for ${\rm DM}_{\rm diff}$
Fast radio bursts (FRBs) are among the most mysterious astronomical transients. Due to their short durations and cosmological distances, their dispersion measure (DM) - redshift ($z$) relation is useful for constraining cosmological parameters and detecting the baryons in the Universe. The increasing number of localized FRBs in recent years has provided more precise constraints on these parameters. In this project, we collect 117 of the latest, localized FRBs, discuss the effect of a more accur…

Finetune Once: Decoupling General & Domain Learning with Dynamic Boosted Annealing
Yang Tang, Ruijie Liu, Yifan Wang, Shiyu Li, Xi Chen
https://arxiv.org/abs/2509.26242 http…

Finetune Once: Decoupling General & Domain Learning with Dynamic Boosted Annealing
Large language models (LLMs) fine-tuning shows excellent implications. However, vanilla fine-tuning methods often require intricate data mixture and repeated experiments for optimal generalization. To address these challenges and streamline the training process, we propose an efficient and universal solution, Dynamic Boosted Annealing (DBA). We obtain a global gradient through zero-learning-rate training on general data, which is subsequently employed for gradient boosting and dynamic training …

Kkkkk, um bot scammer tentando aplicar um golpe em outro bot kkkk.
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Po przeczytaniu https://mastodon.online/@mwichary/115110119665371604 zacząłem sobie trochę myśleć, czy dla zabawy nie spróbować innego układu klawiatury.
Oczywiście, nie rozważałem go po to, by "szybciej pisać". A to z dwóch powodów:
1. Podstawowym …

Design and Experimental Validation of UAV Swarm-Based Phased Arrays with MagSafe- and LEGO-Inspired RF Connectors
Bidya Debnath, Mst Mostary Begum, Prashant Neupant, Brooke E. Molen, Junming Diao
https://arxiv.org/abs/2507.22295

Design and Experimental Validation of UAV Swarm-Based Phased Arrays with MagSafe- and LEGO-Inspired RF Connectors
This paper presents a novel UAV swarm-based phased array antenna system that leverages MagSafe- and LEGO-inspired radio frequency (RF) connectors to address key challenges in distributed phased arrays, including inter-element oscillator synchronization, localization, phase coherence, and positional accuracy. The proposed non-threaded, hands-free connectors enable precise inter-element spacing and establish a continuous, low-loss RF signal propagation path during mid-flight docking. A multi-stag…

A narrowband burst from FRB 20190520B simultaneously observed by FAST and Parkes
Yuhao Zhu, Chenhui Niu, Shi Dai, Di Li, Pei Wang, Yi Feng, Jingwen Wu, Yongkun Zhang, Xianghan Cui, Junshuo Zhang, Jinhuang Cao
https://arxiv.org/abs/2507.17696

A narrowband burst from FRB 20190520B simultaneously observed by FAST and Parkes
Fast Radio Bursts (FRBs) are short-duration radio transients with mysterious origins. Since its uncertainty, there are very few FRBs that are observed by different instruments, simultaneously. This study presents a detailed analysis of a burst from FRB 20190520B observed by FAST and Parkes at the same time. The spectrum of this individual burst ended at the upper limit of the FAST frequency band and was simultaneously detected by the Parkes telescope in the 1.5-1.8 GHz range. By employing spect…

10-W Sub-100-fs Ultrafast Cr:ZnS/ZnSe MOPA System enabled by doping gradient engineering
Guangzi Feng, Xiyue Zhang, Yuchen Wang, Weibo Wu, Gianluca Galzerano, Qing Wang, Ting Yu, Yujie Peng, Jintai Fan, Benxue Jiang, Yuxin Leng, Long Zhang
https://arxiv.org/abs/2509.13639

10-W Sub-100-fs Ultrafast Cr:ZnS/ZnSe MOPA System enabled by doping gradient engineering
We report on a high-power mid-infrared femtosecond master oscillator power amplifier (MOPA) system, employing Cr:ZnS and Cr:ZnSe polycrystals with fine-tuned doping profiles. Based on the soft-aperture Kerr-lens mode-locking in the soliton regime, the seed oscillator generates ~40-fs pulses with a repetition rate ~173 MHz with an average power close to 400 mW. The amplification process of the seed pulse train is investigated in depth in a single-pass configuration for both Cr:ZnS and Cr:ZnSe cr…