Tootfinder

Communication Round and Computation Efficient Exclusive Prefix-Sums Algorithms (for MPI_Exscan)
Jesper Larsson Tr\"aff
https://arxiv.org/abs/2507.04785

Communication Round and Computation Efficient Exclusive Prefix-Sums Algorithms (for MPI_Exscan)
Parallel scan primitives compute element-wise inclusive or exclusive prefix sums of input vectors contributed by $p$ consecutively ranked processors under an associative, binary operator $\oplus$. In message-passing systems with bounded, one-ported communication capabilities, at least $\lceil\log_2 p\rceil$ or $\lceil\log_2 (p-1)\rceil$ communication rounds are required to perform the scans. While there are well-known, simple algorithms for the inclusive scan that solve the problem in $\lceil\l…

I finally got rid of the old bed I’d kept since moving in, so the room feels pretty empty right now.
I’m in the process of reorganizing everything and plan to turn this space into my own anarchist sanctuary.
Soon, I’ll add a bookshelf and more anarchist art to the wall, right next to the communist hammer and sickle symbol.
#Declutter

A tunnelled road underneath Ontario's Highway 401 would be an expensive and very short term solution to congestion. A high speed train subway would be cheaper, move many more people and cost less.
A better Toronto, for all.
A Real Solution to Highway 401 Congestion — the Express Subway.
A subway to Pickering makes much more sense than a 401 Tunnel.

NASA says its NASA live programming will be available on Netflix starting this summer; it will be still available on NASA's app and site for free without ads (Lauren E. Low/NASA)
https://www.nasa.gov/news-release/nasa-is-coming-to-netflix-this-summer/…

NASA+ is Coming to Netflix This Summer - NASA
NASA announced Monday its latest plans to team up with a streaming service to bring space a little closer to home. Starting this summer, NASA+ live

🇺🇦 Auf radioeins läuft...
Grace Cummings:
🎵 On And On
#NowPlaying #GraceCummings
https://gracecummings.bandcamp.com/track/on-and-on
https://open.spotify.com/track/3jP5pUJsLMgWsD3TZVx6xm

#LB Combina muito com este desabafo do Miragaya que estš lš no meio da treta, por conta de um governo que ele jamais apoiou.
E, por favor, não façam comparações esdrúxulas de guerra com a violência urbana de comunidades do Rio de Janeiro ou da Baixada Fluminense. Por mais terrível que a violência urbana seja, só um completo idiota a compara com uma guerra de verdade, que destrói tudo em seu c…

Combinatorial $t$-Designs from Finite Abelian Groups and Their Applications to Elliptic Curve Codes
Hengfeng Liu, Chunming Tang, Cuiling Fan, Rong Luo
https://arxiv.org/abs/2506.00429

Combinatorial $t$-Designs from Finite Abelian Groups and Their Applications to Elliptic Curve Codes
In this paper, we establish the conditions for some finite abelian groups and the family all the $k$-sets in each of them summing up to an element $x$ to form $t$-designs. We fully characterize the sufficient and necessary conditions for the incidence structures to form $1$-designs in finite abelian $p$-groups, generalizing existing results on vector spaces over finite fields. For finite abelian groups of exponent $pq$, we also propose sufficient and necessary conditions for the incidence struc…

How to Protest Safely in the Age of Surveillance https://www.wired.com/story/how-to-protest-safely-surveillance-digital-privacy/

Towards Real-Time Interpolation for Enhanced AUV Deep Sea Mapping
Devanshu Saxena
https://arxiv.org/abs/2505.22675 https://arxiv.org/…

Towards Real-Time Interpolation for Enhanced AUV Deep Sea Mapping
Approximately seventy-one percent of the Earth is covered in water. Of that area, ninety-five percent of the ocean has never been explored or mapped. There are several engineering challenges that have prevented the exploration of the deep ocean through human or autonomous means. These challenges include but are not limited to high pressure, cold temperatures, little natural light, corrosion of materials, and communication. Ongoing research has been focused on trying to find optimal and low-cost…

Widely Linear Augmented Extreme Learning Machine Based Impairments Compensation for Satellite Communications
Yang Luo, Arunprakash Jayaprakash, Gaojie Chen, Chong Huang, Qu Luo, De Mi, Pei Xiao
https://arxiv.org/abs/2506.14557

Widely Linear Augmented Extreme Learning Machine Based Impairments Compensation for Satellite Communications
Satellite communications are crucial for the evolution beyond fifth-generation networks. However, the dynamic nature of satellite channels and their inherent impairments present significant challenges. In this paper, a novel post-compensation scheme that combines the complex-valued extreme learning machine with augmented hidden layer (CELMAH) architecture and widely linear processing (WLP) is developed to address these issues by exploiting signal impropriety in satellite communications. Althoug…