Tootfinder

“A sign of the scale of #’Twitter’s bot problem is the thriving #botindustry. Bot makers from around the world advertise their services on freelancer websites.
A computer scientist in Pakistan, sells "ChatGPT Twitter bots" for $30 to $500, depending on complexity.
In an interview with the ABC …he said could make a "fully fledged" bot that could "like comments o…

Twitter is becoming a 'ghost town' of bots as AI-generated spam content floods the internet
The internet is filling up with machine-generated "zombie content" designed to game algorithms and scam humans. Experts call it the "great AI flood".

Metrology of microwave fields based on trap-loss spectroscopy with cold Rydberg atoms
Romain Duverger, Alexis Bonnin, Romain Granier, Quentin Marolleau, C\'edric Blanchard, Nassim Zahzam, Yannick Bidel, Malo Cadoret, Alexandre Bresson, Sylvain Schwartz
https://arxiv.org/abs/2404.17445 https://arxiv.org/pdf/2404.17445
arXiv:2404.17445v1 Announce Type: new
Abstract: We demonstrate a new approach for the metrology of microwave fields based on the trap-loss-spectroscopy of cold Rydberg atoms in a magneto-optical trap. Compared to state-of-the-art sensors using room-temperature vapors, cold atoms allow longer interaction times, better isolation from the environment and a reduced Doppler effect. Our approach is particularly simple as the detection relies on fluorescence measurements only. Moreover, our signal is well described by a two-level model across a broad measurement range, allowing in principle to reconstruct the amplitude and the frequency of the microwave field simultaneously without the need for an external reference field. We report on a scale factor linearity at the percent level and no noticeable drifts over two hours, paving the way for new applications of cold Rydberg atoms in metrology such as calibrating blackbody shifts in state-of-the-art optical clocks, monitoring the Earth cryosphere from space, measuring the cosmic microwave background or searching for dark matter.

The editor of Godmonster of Indian Flats was Richard S. Brummer, who did sound editing and stunts (!?) for Faster, Pussycat! Kill! Kill!
The more I think/learn about this movie the more I love it.
#Monsterdon #godmonsterofindianflats

Metrology of microwave fields based on trap-loss spectroscopy with cold Rydberg atoms
Romain Duverger, Alexis Bonnin, Romain Granier, Quentin Marolleau, C\'edric Blanchard, Nassim Zahzam, Yannick Bidel, Malo Cadoret, Alexandre Bresson, Sylvain Schwartz
https://arxiv.org/abs/2404.17445 https://arxiv.org/pdf/2404.17445
arXiv:2404.17445v1 Announce Type: new
Abstract: We demonstrate a new approach for the metrology of microwave fields based on the trap-loss-spectroscopy of cold Rydberg atoms in a magneto-optical trap. Compared to state-of-the-art sensors using room-temperature vapors, cold atoms allow longer interaction times, better isolation from the environment and a reduced Doppler effect. Our approach is particularly simple as the detection relies on fluorescence measurements only. Moreover, our signal is well described by a two-level model across a broad measurement range, allowing in principle to reconstruct the amplitude and the frequency of the microwave field simultaneously without the need for an external reference field. We report on a scale factor linearity at the percent level and no noticeable drifts over two hours, paving the way for new applications of cold Rydberg atoms in metrology such as calibrating blackbody shifts in state-of-the-art optical clocks, monitoring the Earth cryosphere from space, measuring the cosmic microwave background or searching for dark matter.

Vector representations and unit vector representations of fields -- problems of understanding and possible teaching strategies
Christoph Hoyer, Raimund Girwidz
https://arxiv.org/abs/2402.11912

Vector representations and unit vector representations of fields -- problems of understanding and possible teaching strategies
Vector fields are a highly abstract physical concept that is often taught using visualizations. Although vector representations are particularly suitable for visualizing quantitative data, they are often confusing, especially when describing real fields such as magnetic and electric fields, as the vector arrows can overlap. The present study examines vector understanding at the end of secondary education. In particular, the extent to which the geometry of the field can be derived from conventio…

Vector representations and unit vector representations of fields -- problems of understanding and possible teaching strategies
Christoph Hoyer, Raimund Girwidz
https://arxiv.org/abs/2402.11912

Vector representations and unit vector representations of fields -- problems of understanding and possible teaching strategies
Vector fields are a highly abstract physical concept that is often taught using visualizations. Although vector representations are particularly suitable for visualizing quantitative data, they are often confusing, especially when describing real fields such as magnetic and electric fields, as the vector arrows can overlap. The present study examines vector understanding at the end of secondary education. In particular, the extent to which the geometry of the field can be derived from conventio…

Implicit Assimilation of Sparse In Situ Data for Dense & Global Storm Surge Forecasting
Patrick Ebel, Brandon Victor, Peter Naylor, Gabriele Meoni, Federico Serva, Rochelle Schneider
https://arxiv.org/abs/2404.05758

Implicit Assimilation of Sparse In Situ Data for Dense & Global Storm Surge Forecasting
Hurricanes and coastal floods are among the most disastrous natural hazards. Both are intimately related to storm surges, as their causes and effects, respectively. However, the short-term forecasting of storm surges has proven challenging, especially when targeting previously unseen locations or sites without tidal gauges. Furthermore, recent work improved short and medium-term weather forecasting but the handling of raw unassimilated data remains non-trivial. In this paper, we tackle both cha…

Metrology of microwave fields based on trap-loss spectroscopy with cold Rydberg atoms
Romain Duverger, Alexis Bonnin, Romain Granier, Quentin Marolleau, C\'edric Blanchard, Nassim Zahzam, Yannick Bidel, Malo Cadoret, Alexandre Bresson, Sylvain Schwartz
https://arxiv.org/abs/2404.17445