Tootfinder

karate: Zachary Karate Club
Network of friendships among members of a university karate club. Includes metadata for faction membership after a social partition. Note: there are two versions of this network, one with 77 edges and one with 78, due to an ambiguous typo in the original study. (The most commonly used is the one with 78 edges.).
This network has 34 nodes and 78 edges.
Tags: Social, Offline, Unweighted

Sensor Model Identification via Simultaneous Model Selection and State Variable Determination
Christian Brommer, Alessandro Fornasier, Jan Steinbrener, Stephan Weiss
https://arxiv.org/abs/2506.11263

Sensor Model Identification via Simultaneous Model Selection and State Variable Determination
We present a method for the unattended gray-box identification of sensor models commonly used by localization algorithms in the field of robotics. The objective is to determine the most likely sensor model for a time series of unknown measurement data, given an extendable catalog of predefined sensor models. Sensor model definitions may require states for rigid-body calibrations and dedicated reference frames to replicate a measurement based on the robot's localization state. A health metric is…

PORTLAND, Ore. — Health officials in Hood River County confirmed Monday that two local deaths have been linked to a rare brain disease within the last eight months.
During that period, the county said, there have been one confirmed and two probable cases of
Creutzfeldt-Jakob Disease, or CJD, a prion disorder somewhat similar to the more commonly known "mad cow disease."
So far, two of those cases have resulted in death

Huh, so the American "No Kings Day" is happening on the same day as the Commonwealth's "Kings Official Summer Birthday".
Strange coincidence.
I think there should be no kings and no king's birthday celebrations FWIW. Power passed down the genetic line like a mutation is ridiculous, and anyway no power should be concentrated in one person like that in the first place.
Have a happy holiday, whichever you are celebrating/protesting.
#kingsBirthday #noKingsDay

We all perform tasks in our day-to-day work that are considered 'non-promotable' – these are crucial for project success, but they won't get you promoted. This is commonly known as 'glue work', a term coined by Tanya Reilly. Join Fatima Taj at this year's Berlin Buzzwords as she shares her personal experience of narrowly avoiding the trap of being permanently stuck with glue work, and explains how to handle similar situations.
Learn more:

A DC-Reformulation for Gradient-$L^0$-Constrained Problems in Function Spaces
Bastian Dittrich, Evelyn Herberg, Roland Herzog, Georg M\"uller
https://arxiv.org/abs/2506.11917

A DC-Reformulation for Gradient-$L^0$-Constrained Problems in Function Spaces
Cardinality constraints in optimization are commonly of $L^0$-type, and they lead to sparsely supported optimizers. An efficient way of dealing with these constraints algorithmically, when the objective functional is convex, is reformulating the constraint using the difference of suitable $L^1$- and largest-$K$-norms and subsequently solving a sequence of penalized subproblems in the difference-of-convex (DC) class. We extend this DC-reformulation approach to problems with $L^0$-type cardinalit…

On existence of a variational regularization parameter under Morozov's discrepancy principle
Liang Ding, Long Li, Weimin Han, Wei Wang
https://arxiv.org/abs/2506.11397

On existence of a variational regularization parameter under Morozov's discrepancy principle
Morozov's discrepancy principle is commonly adopted in Tikhonov regularization for choosing the regularization parameter. Nevertheless, for a general non-linear inverse problem, the discrepancy $\|F(x_α^δ)-y^δ\|_Y$ does not depend continuously on $α$ and it is questionable whether there exists a regularization parameter $α$ such that $τ_1δ\leq \|F(x_α^δ)-y^δ\|_Y\leq τ_2 δ$ $(1\le τ_1<τ_2)$. In this paper, we prove the existence of $α$ under Morozov's discrepan…

An Exact Moment-Based Approach for Chemical Reaction-Diffusion Networks: From Mass Action to Hill Functions
Manuel Eduardo Hern\'andez-Garc\'ia, Eduardo Moreno-Barbosa, Jorge Vel\'azquez-Castro
https://arxiv.org/abs/2505.09053

An Exact Moment-Based Approach for Chemical Reaction-Diffusion Networks: From Mass Action to Hill Functions
Biochemical systems are inherently stochastic, particularly those with small-molecule populations. The spatial distribution of molecules plays a critical role and requires the inclusion of spatial coordinates in their analysis. Stochastic models such as the chemical master equation are commonly used to study these systems. However, analytical solutions are limited to specific cases, and stochastic simulations require significant computational resources. To mitigate these challenges, approximati…

New preprint!
User-space library rootkits revisited: Are user-space detection mechanisms futile?
https://arxiv.org/abs/2506.07827

Viral Dark Matter: Illuminating Protein Function, Ecology, and Biotechnological Promises
James C. Kosmopoulos, Karthik Anantharaman
https://arxiv.org/abs/2506.11942

Viral Dark Matter: Illuminating Protein Function, Ecology, and Biotechnological Promises
Viruses are the most abundant biological entities on Earth and play central roles in shaping microbiomes and influencing ecosystem functions. Yet, most viral genes remain uncharacterized, comprising what is commonly referred to as "viral dark matter." Metagenomic studies across diverse environments consistently show that 40-90% of viral genes lack known homologs or annotated functions. This persistent knowledge gap limits our ability to interpret viral sequence data, understand virus-host inter…