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Investigating models for misalignment | AISI Work
Unknown Author
AI Security Institute
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View paper →Anthropic's Pilot Sabotage Risk Report
Anthropic
Anthropic
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View paper →Origin of yield stress and mechanical plasticity in model biological tissues
Anh Q. Nguyen, Junxiang Huang, Dapeng Bi
arXiv·2024
During development and under normal physiological conditions, biological tissues are continuously subjected to substantial mechanical stresses. In response to large deformations cells in a tissue must undergo multicellular rearrangements in order to maintain integrity and robustness. However, how these events are connected in time and space remains unknown. Here, using computational and theoretical modeling, we studied the mechanical plasticity of epithelial monolayers under large deformations. Our results demonstrate that the jamming-unjamming (solid-fluid) transition in tissues can vary significantly depending on the degree of deformation, implying that tissues are highly unconventional materials. Using analytical modeling, we elucidate the origins of this behavior. We also demonstrate how a tissue accommodates large deformations through a collective series of rearrangements, which behave similarly to avalanches in non-living materials. We find that these tissue avalanches are governed by stress redistribution and the spatial distribution of vulnerable spots. Finally, we propose a simple and experimentally accessible framework to predict avalanches and infer tissue mechanical stress based on static images.
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View paper →What is digital activism anyway? Social constructions of the “digital” in contemporary activism
Suay Melisa Özkula
Journal of Digital Social Research·2021·38 citations
<jats:p>In recent decades, digital activism has received a lot of scholarly and journalistic attention. Even so, there remains no firm consensus on its precise definition and scope. This paper addresses this conceptual haziness and contends that there are analytical issues and conceptual implications in the openness of the term and its description as digital, as 'digitality' is neither the sole nor the primary feature along which activism has changed. Drawing on extant practices of digital activism and conceptual approaches to its scope, the paper aims to (1) critically discuss & highlight a range of conceptual obscurities in digital activism scholarship, (2) provide a glimpse into the concept’s evolution, and, through these (3) suggest that the term (incl. synonyms) suffers from myriad conceptual and epistemological fallacies: omissions of the concept’s complexity (e.g. hybridity, rhizomatism, multi- mediality), implications of digital dualism and therefore potentially technological determinism, and the invitation of stigma, luddite sentiment, and other social constructions of the technologies to which the term is attached.</jats:p>
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