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Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Linking friction, social coordination and the speed of evolution
摩擦 社会协调 进化速度
2023/4/14
We consider a model of social coordination and network formation where agents decide on an action in a coordination game and on whom to form costly links with. We explore the role of linking friction,...
Theorists smooth the way to modeling quantum friction
Theorists smooth the way quantum friction
2016/5/19
Theoretical chemists at Princeton University have pioneered a strategy for modeling quantum friction, or how a particle’s environment drags on it, a vexing problem in quantum mechanics since the birth...
Modeling the dynamic rupture propagation on heterogeneous faults with rate- and state-dependent friction
dynamic rupture fault constitutive law fault friction stress heterogeneities
2015/9/10
We investigate the effects of non-uniform distribution of constitutive parameters on the dynamic propagation of
an earthquake rupture. We use a 2D finite difference numerical method and we assume tha...
Embedded strong discontinuity finite elements for fractured geomaterials with variable friction
bifurcation rate- and state-friction strong discontinuity enhanced strain finite element
2015/7/1
The strong discontinuity approach to modelling strain localization, combined with an enhanced strain element, has been used for more than a decade to model strain localization in materials including g...
An extended finite element framework for slow-rate frictional faulting with bulk plasticity and variable friction
extended finite element friction fault plasticity
2015/7/1
We present an extended finite element (FE) approach for the simulation of slow-rate frictional faulting in geologic media incorporating bulk plasticity and variable friction. The method allows the fau...
In tuning friction to the point where it disappears,technique could boost development of nanomachines
tuning friction to the point disappears nanomachines
2015/6/18
Friction is all around us, working against the motion of tires on pavement, the scrawl of a pen across paper, and even the flow of proteins through the bloodstream. Whenever two surfaces come in conta...
Penn and UC Merced Researchers Match Physical and Virtual Atomic Friction Experiments
Penn and UC Merced Researchers Match Physical Virtual Atomic Friction Experiments
2015/5/25
Technological limitations have made studying friction on the atomic scale difficult, but researchers at the University of Pennsylvania and the University of California, Merced, have now made advances ...
Impact and Friction Sensitivity of Energetic Materials: Methodical Evaluation of Technological Safety Features
energetic materials experimental testing friction sensitivity impact sensitivity regressive analysis safety in use methodical evaluation
2015/7/28
Key methods developed and used in the USSR and in the Russian Federation to determine the impact and friction sensitivity of energetic materials and explosives have been discussed. Experimental metho...
Science friction: Unlocking this basic force may lead to futuristic technologies（图）
Science friction Unlocking futuristic technologies
2015/3/18
Here’s the rub with friction — scientists don’t really know how it works. Sure, humans have been harnessing the power of friction since rubbing two sticks together to build the first fire, but th...
MICROTOPOGRAPHY – THE PHOTOGRAMMETRIC DETERMINATION OF FRICTION SURFACES
Microphotogrammetry Microtopography Close Range Matching Digital Surface Model Change Detection
2015/1/6
The understanding of friction processes assumes numerous methods for analysing the features and changes of surfaces in micro- and nanoscale. One of these features is the three-dimensional characterisa...
The present paper - a continuation of our recent series of papers on Casimir friction for a pair of particles at low relative particle velocity - extends the analysis so as to include dense media. The...
Low friction along the high slip patch of the 2011 Mw 9.0 Tohoku-Oki earthquake required from the wedge structure and extensional splay faults
Low friction along the high slip patch 2011 Mw 9.0 Tohoku-Oki earthquake required the wedge structure extensional splay faults
2014/4/15
We analyze the mechanical properties needed to account for the large shallow slip during the 2011 Tohoku-Oki earthquake and the activation of landward normal faulting within the forearc. We show that ...
The Process for Making Tax Policy in the United States: A System Full of Friction
Tax policy policy making T ax legislaT ion process UniT ed sTaT es
2014/4/10
The American Revolution (1775-1783) resulted in the independence of 13 of Great
Britain’s North American colonies. In the 1780s, leaders of the new American nation
realized that the national gover...
Megathrust friction determined from mechanical analysis of the forearc in the Maule earthquake area
Maule earthquake frictional properties dynamic weakening critical wedge
2014/4/15
The seismogenic potential of a given fault depends essentially on its frictional properties and on the mechanical properties of the medium. Determining the spatio-temporal variations of frictional pro...
Non-stationary patterns of isolation-by-distance: inferring measures of genetic friction
landscape genetics gene flow genetic barrier isolation by distance,non-stationary kriging
2012/11/26
The pattern of isolation-by-distance arises when population differentiation increases with increasing geographic distances. This pattern is usually caused by local spatial dispersal which explains why...