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Possible new phase transition in the 3D Ising model associated with boundary percolation.
J Phys Condens Matter
April 2023
Department of Physics, State University of New York at Fredonia, Fredonia, NY 14063, United States of America.
In the ordered phase of the 3D Ising model, minority spin clusters are surrounded by a boundary of dual plaquettes. As the temperature is raised, these spin clusters become more numerous, and it is found that eventually their boundaries undergo a percolation transition when about 13% of spins are minority. Boundary percolation differs from the more commonly studied site and link percolation, although it is related to an unusual type of site percolation that includes next to nearest neighbor relationships.
View Article and Find Full Text PDFTheoretical foundations of studying criticality in the brain.
Netw Neurosci
October 2022
Department of Psychology & Tsinghua Laboratory of Brain and Intelligence, Tsinghua University, Beijing, China.
Criticality is hypothesized as a physical mechanism underlying efficient transitions between cortical states and remarkable information-processing capacities in the brain. While considerable evidence generally supports this hypothesis, nonnegligible controversies persist regarding the ubiquity of criticality in neural dynamics and its role in information processing. Validity issues frequently arise during identifying potential brain criticality from empirical data.
View Article and Find Full Text PDFThe Cosmology of Evidence: Suffering, Science, and Biological Witness After Three Mile Island.
J Hist Biol
April 2021
Centre for Criminology & Sociolegal Studies, University of Toronto, Toronto, ON, Canada.
The 1979 partial nuclear reactor meltdown at Three Mile Island was simultaneously hyper-visible and hidden from public view. It was the subject of non-stop media attention, but its causes and consequences required expert explanation. No fire or explosion marked the moment when insensible radionuclides escaped the facility.
View Article and Find Full Text PDFA General Mechanism for the Propagation of Mutational Effects in Proteins.
Biochemistry
January 2017
Department of Biotechnology, Bhupat & Jyoti Mehta School of Biosciences, Indian Institute of Technology Madras, Chennai 600036, India.
Mutations in the hydrophobic interior of proteins are generally thought to weaken the interactions only in their immediate neighborhood. This forms the basis of protein engineering-based studies of folding mechanism and function. However, mutational work on diverse proteins has shown that distant residues are thermodynamically coupled, with the network of interactions within the protein acting as signal conduits, thus raising an intriguing paradox.
View Article and Find Full Text PDFEquivalence of several generalized percolation models on networks.
Phys Rev E
September 2016
School of Mathematics, School of Biology, and MAXIMA, Monash University, Melbourne, VIC Australia and Institute for Disease Modeling, Bellevue, Washington 98005, USA.
In recent years, many variants of percolation have been used to study network structure and the behavior of processes spreading on networks. These include bond percolation, site percolation, k-core percolation, bootstrap percolation, the generalized epidemic process, and the Watts threshold model (WTM). We show that-except for bond percolation-each of these processes arises as a special case of the WTM, and bond percolation arises from a small modification.
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