Tootfinder

This https://arxiv.org/abs/2406.11975 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qbi…

Fast uncovering of protein sequence diversity from structure
We present InvMSAFold, an inverse folding method for generating protein sequences that is optimized for diversity and speed. For a given structure, InvMSAFold generates the parameters of a probability distribution over the space of sequences with pairwise interactions, capturing the amino acid covariances observed in Multiple Sequence Alignments (MSA) of homologous proteins. This allows for the efficient generation of highly diverse protein sequences while preserving structural and functional i…

Electron-positron pair annihilation in kinetic plasma
Haidar Al-Naseri
https://arxiv.org/abs/2505.22891 https://arxiv.org/pdf/2505.22…

Electron-positron pair annihilation in kinetic plasma
The process of electron positron pair annihilation, driven by strong fields (Inverse Schwinger mechanism) and high-frequency waves, is studied using the Dirac Heisenberg Wigner formalism. In an electron positron plasma, the presence of a strong field leads to both pair creation and annihilation. Depending on plasma properties such as non-degeneracy and the momentum distribution, pair annihilation can dominate over pair creation. The energy released from annihilated pairs can lead to an enhancem…

This https://arxiv.org/abs/2306.16409 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Alchemical diastereomers from antisymmetric alchemical perturbations
The leading order Hellmann-Feynman term in the energy difference between any two iso-electronic systems is exact up to third order for the averaged reference Hamiltonian because even-order contributions cancel out. This finding holds for {any} iso-electronic compound pair (dubbed `alchemical diastereomers'), regardless of differences in configuration, composition, or energy. As a result, first order relative energy estimates for all possible iso-electronic alchemical diastereomer pairs, derived…

MOA-2022-BLG-091Lb and KMT-2024-BLG-1209Lb: Microlensing planets detected through weak caustic-crossing signals
Cheongho Han, Chung-Uk Lee, Andrzej Udalski, Ian A. Bond, Hongjing Yang, Michael D. Albrow, Sun-Ju Chung, Andrew Gould, Youn Kil Jung, Kyu-Ha Hwang, Yoon-Hyun Ryu, Yossi Shvartzvald, In-Gu Shin, Jennifer C. Yee, Weicheng Zang, Tanagodchaporn Inyanya, Sang-Mok Cha, Doeon Kim, Dong-Jin Kim, Seung-Lee Kim, Dong-Joo Lee, Yongseok Lee, Byeong-Gon Park, Richard W. Pogge, Przemek Mr…

MOA-2022-BLG-091Lb and KMT-2024-BLG-1209Lb: Microlensing planets detected through weak caustic-crossing signals
The light curves of the microlensing events MOA-2022-BLG-091 and KMT-2024-BLG-1209 exhibit anomalies with very similar features. These anomalies appear near the peaks of the light curves, where the magnifications are moderately high, and are distinguished by weak caustic-crossing features with minimal distortion while the source remains inside the caustic. To achieve a deeper understanding of these anomalies, we conducted a comprehensive analysis of the lensing events. We carried out binary-len…

Last week, we continued our #ISE2025 lecture on distributional semantics with the introduction of neural language models (NLMs) and compared them to traditional statistical n-gram models.
Benefits of NLMs:
- Capturing Long-Range Dependencies
- Computational and Statistical Tractability
- Improved Generalisation
- Higher Accuracy
@…

Phase transitions in the Prisoner's Dilemma game on the Barab\'asi-Albert graph with participation cost
Jacek Mi\c{e}kisz, Javad Mohamadichamgavi
https://arxiv.org/abs/2505.23370

Phase transitions in the Prisoner's Dilemma game on the Barabási-Albert graph with participation cost
We examine the impact of the maintenance cost of social links on cooperative behavior in the Prisoner's Dilemma game on the Barabási-Albert scale-free network with a pairwise stochastic imitation. We show by means of Monte Carlo simulations and pair approximation that the cooperation frequency changes abruptly from an almost full cooperation to a much smaller value when we increase the cost of maintaining links. In the critical region, the stationary distribution is bi-modal and the system osc…

“#SFUSD sent a sternly worded letter to the #SFParksAlliance. The language was cool and technical, but the meaning was not. It mirrored the poem that won Flyguy the Pimp of the Year contest: ‘Better have my money! Through rain, sleet or snow! Better have my money! Not half! Not some! But alllllllll my…

S.F. Parks Alliance’s downfall came gradually, then suddenly. But always predictably.
Years ago, the Parks Alliance allegedly stiffed the school district a six-figure sum. Why have consequences been so long in coming? 

A lot to celebrate in the lab at the end of the school year — students at commencement, and a campus award for our paper presenting a reconstruction of Joshua tree flowering activity since the early 20th century
https://lab.jbyoder.org/2025/05/22/com

"how and why de-enshittify the Internet" (only in Fr)
Le Monde – Comment et pourquoi dé-merdifier l’Internet
https://www.lemonde.fr/sciences-au-carre/article/2025/05/22/comment-et-pourquoi-de-merdifier-l-internet_66…

tulipsezono
aŭ en kvazaŭ naturo
aŭ en ĝardeno
#hajko #esperanto