scholarly journals Figure Rotation of Dark Halos in Cold Dark Matter Simulations

2006 ◽  
Vol 2 (S235) ◽  
pp. 80-80
Author(s):  
S.E. Bryan ◽  
C.M. Cress
Keyword(s):  
Dark Matter ◽  
Normal Distribution ◽  
Total Mass ◽  
Cold Dark Matter ◽  
Rotation Speed ◽  
Dark Matter Halos ◽  
Average Rotation ◽  
Log Normal ◽  
Figure Rotation ◽  
Log Normal Distribution

AbstractWe investigate the rotation of dark matter halos identified in ΛCDM simulations. After removing halos that contain a significant amount of substructure, about 82% of the remaining halos were found to undergo coherent rotation over 5h−1 Gyr. The rotation speeds follow a log-normal distribution. The average rotation speed of a halo was 0.11h rads/Gyr. Less than half of the selected halos showed alignment between their rotation and minor axes. We found no correlation between halo properties, such as total mass, and the rotation speed.

scholarly journals A Universal Model for the Log-Normal Distribution of Elasticity in Polymeric Gels and Its Relevance to Mechanical Signature of Biological Tissues

Biology ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 64
Author(s):  
Arnaud Millet
Keyword(s):  
Elastic Modulus ◽  
Normal Distribution ◽  
Biological Tissues ◽  
Force Microscopy ◽  
Polymeric Gels ◽  
Atomic Force ◽  
Clear Explanation ◽  
Log Normal ◽  
Log Normal Distribution

The mechanosensitivity of cells has recently been identified as a process that could greatly influence a cell’s fate. To understand the interaction between cells and their surrounding extracellular matrix, the characterization of the mechanical properties of natural polymeric gels is needed. Atomic force microscopy (AFM) is one of the leading tools used to characterize mechanically biological tissues. It appears that the elasticity (elastic modulus) values obtained by AFM presents a log-normal distribution. Despite its ubiquity, the log-normal distribution concerning the elastic modulus of biological tissues does not have a clear explanation. In this paper, we propose a physical mechanism based on the weak universality of critical exponents in the percolation process leading to gelation. Following this, we discuss the relevance of this model for mechanical signatures of biological tissues.

The Log Normal Distribution 1

2020 ◽  
pp. 150-188
Author(s):  
Richard Holland ◽  
Richard St. John
Keyword(s):  
Normal Distribution ◽  
Log Normal ◽  
Log Normal Distribution
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