Tootfinder

Stability Analysis of Interacting Wireless Repeaters
Erik G. Larsson, Jianan Bai
https://arxiv.org/abs/2405.01074 https://arxiv.org/p…

Stability Analysis of Interacting Wireless Repeaters
We consider a wireless network with multiple single-antenna repeaters that amplify and instantaneously re-transmit the signals they receive to improve the channel rank and system coverage. Due to the positive feedback formed by inter-repeater interference, stability could become a critical issue. We investigate the problem of determining the maximum amplification gain that the repeaters can use without breaking the system stability. Specifically, we obtain a bound by using the Gershgorin disc t…

It would be harsh to say that requests is a pile of poorly-written attractive nuisances on top of urllib3. But, unfortunately, it wouldn’t be wrong.
Many diligent devs have spent countless work hours trying to unfuck the project over the years, but there’s only so much you can do when:
“After receiving our first security disclosure, I was told that Requests wasn't a serious project but instead one person's art project and thus we shouldn't fix the vulnerability.”

Cowboys have serious complaints about specific aspect of organization https://www.yardbarker.com/nfl/articles/cowboys_have_serious_complaints_about_specific_aspect_of_organization/s1_17313_40031238

Cowboys have serious complaints about specific aspect of organization
The NFLPA recently published its report cards gathering feedback from over 1,700 players from the 32 teams that make up the league. Among them, the Dallas Cowboys received overall positive grades but a specific aspect of the team surprisingly ranks near the bottom of the league: Training room and staff. Per the report card, which you can see in full below, Cowboys players graded their training room C- (26th in the NFL) while handing the training staff a devastating D+ (30th).  According to th…

On the global dynamics of a forest model with monotone positive feedback and memory
Franco Herrera, Sergei Trofimchuk
https://arxiv.org/abs/2404.16749 http…

On the global dynamics of a forest model with monotone positive feedback and memory
We continue to study (see arXiv:2401.08618, https://doi.org/10.48550/arXiv.2401.08618) a renewal equation $ϕ(t)=\frak Fϕ_t$ proposed in [C. Barril et al., J. Math. Biology, https://doi.org/10.1007/s00285-024-02084-x] to model trees growth. This time we are considering the case when the per capita reproduction rate $β(x)$ is a non-monotone (unimodal) function of tree's height $x$. Note that the height of some species of trees can impact negatively seed viability, in a kind of autogamy depress…

SIGformer: Sign-aware Graph Transformer for Recommendation
Sirui Chen, Jiawei Chen, Sheng Zhou, Bohao Wang, Shen Han, Chanfei Su, Yuqing Yuan, Can Wang
https://arxiv.org/abs/2404.11982

SIGformer: Sign-aware Graph Transformer for Recommendation
In recommender systems, most graph-based methods focus on positive user feedback, while overlooking the valuable negative feedback. Integrating both positive and negative feedback to form a signed graph can lead to a more comprehensive understanding of user preferences. However, the existing efforts to incorporate both types of feedback are sparse and face two main limitations: 1) They process positive and negative feedback separately, which fails to holistically leverage the collaborative info…

It would be harsh to say that requests is a pile of poorly-written attractive nuisances on top of urllib3. But, unfortunately, it wouldn’t be wrong.
Many diligent devs have spent countless work hours trying to unfuck the project over the years, but there’s only so much you can do when:
“After receiving our first security disclosure, I was told that Requests wasn't a serious project but instead one person's art project and thus we shouldn't fix the vulnerability.”

Logic-dependent emergence of multistability, hysteresis, and biphasic dynamics in a minimal positive feedback network with an autoloop
Akriti Srivastava, Mubasher Rashid
https://arxiv.org/abs/2404.05379

Logic-dependent emergence of multistability, hysteresis, and biphasic dynamics in a minimal positive feedback network with an autoloop
Cellular decision-making (CDM) is a dynamic phenomenon often controlled by regulatory networks defining interactions between genes and transcription factor proteins. Traditional studies have focussed on molecular switches such as positive feedback circuits that exhibit at most bistability. However, higher-order dynamics such as tristability is also prominent in many biological processes. It is thus imperative to identify a minimal circuit that can alone explain mono, bi, and tristable dynamics.…

Contractility-driven cell motility against a viscoelastic resistance
Tapas Singha, Pierre Sens
https://arxiv.org/abs/2402.17669 https://

Contractility-driven cell motility against a viscoelastic resistance
We study a model of contraction-based cell motility inside a microchannel to investigate the regulation of cell polarization and motion by the mechanical resistance of the environment. A positive feedback between the asymmetry of the acto-myosin cortex density and cell motion gives rise to a spontaneous symmetry breaking beyond a threshold contractility that depends on the resistance of extracellular medium. In highly viscous environments, we predict bistability under moderate contractility, so…

A Constrained Tracking Controller for Ramp and Sinusoidal Reference Signals using Robust Positive Invariance
Geovana Franca dos Santos, Eugenio B. Castelan, Walter Lucia
https://arxiv.org/abs/2403.08987

A Constrained Tracking Controller for Ramp and Sinusoidal Reference Signals using Robust Positive Invariance
This paper proposes an output feedback controller capable of ensuring steady-state offset-free tracking for ramp and sinusoidal reference signals while ensuring local stability and state and input constraints fulfillment. The proposed solution is derived by jointly exploiting the internal model principle, polyhedral robust positively invariant arguments, and the Extended Farkas' Lemma. In particular, by considering a generic class of output feedback controller equipped with a feedforward term, …

Metro #Vancouver is holding Climate Action Dialogues on #transportation. Attend in-person events on May 28 or 30 in Surrey and Vancouver, or join online on June 6.
This Dialogue will explore ways to move people and goods, while relying less on individual cars. There are positive impacts of reduced driv…

Metro Vancouver Conference Day | Metro Vancouver
Watch presentations and complete a survey with your feedback on the inaugural Metro Vancouver Conference Day.

Contractility-driven cell motility against a viscoelastic resistance
Tapas Singha, Pierre Sens
https://arxiv.org/abs/2402.17669 https://

Contractility-driven cell motility against a viscoelastic resistance
We study a model of contraction-based cell motility inside a microchannel to investigate the regulation of cell polarization and motion by the mechanical resistance of the environment. A positive feedback between the asymmetry of the acto-myosin cortex density and cell motion gives rise to a spontaneous symmetry breaking beyond a threshold contractility that depends on the resistance of extracellular medium. In highly viscous environments, we predict bistability under moderate contractility, so…

The Future of the Laser Lightning Rod
Thomas Produit, J\'er\^ome Kasparian, Farhad Rachidi, Marcos Rubinstein, Aur\'elien Houard, Jean-Pierre Wolf
https://arxiv.org/abs/2404.10020

The Future of the Laser Lightning Rod
The recent development of high average, high peak power lasers has revived the effort of using lasers as a potential tool to influence natural lightning. Although impressive, the current progress in laser lightning control technology may only be the beginning of a phase involving a positive feedback between powerful laser development and atmospheric research. In this review paper, we critically evaluate the past, present and future of the Laser Lightning Rod Technology (LLRT) approach, consider…

This https://arxiv.org/abs/2403.08987 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_mat…

A Constrained Tracking Controller for Ramp and Sinusoidal Reference Signals using Robust Positive Invariance
This paper proposes an output feedback controller capable of ensuring steady-state offset-free tracking for ramp and sinusoidal reference signals while ensuring local stability and state and input constraints fulfillment. The proposed solution is derived by jointly exploiting the internal model principle, polyhedral robust positively invariant arguments, and the Extended Farkas' Lemma. In particular, by considering a generic class of output feedback controller equipped with a feedforward term, …

Metro #Vancouver is holding Climate Action Dialogues on #transportation. Attend in-person events on May 28 or 30 in Surrey and Vancouver, or join online on June 6.
This Dialogue will explore ways to move people and goods, while relying less on individual cars. There are positive impacts of reduced driv…

Metro Vancouver Conference Day | Metro Vancouver
Watch presentations and complete a survey with your feedback on the inaugural Metro Vancouver Conference Day.

A Directional Diffusion Graph Transformer for Recommendation
Zixuan Yi, Xi Wang, Iadh Ounis
https://arxiv.org/abs/2404.03326 https://…

A Directional Diffusion Graph Transformer for Recommendation
In real-world recommender systems, implicitly collected user feedback, while abundant, often includes noisy false-positive and false-negative interactions. The possible misinterpretations of the user-item interactions pose a significant challenge for traditional graph neural recommenders. These approaches aggregate the users' or items' neighbours based on implicit user-item interactions in order to accurately capture the users' profiles. To account for and model possible noise in the users' int…