Results 101 to 110 of about 403,839 (268)

From Entropic Dynamics to Quantum Theory

open access: yes, 2010
Non-relativistic quantum theory is derived from information codified into an appropriate statistical model. The basic assumption is that there is an irreducible uncertainty in the location of particles: positions constitute a configuration space and the ...
Ariel Caticha   +2 more
core   +1 more source

Tire track geometry: Variations on a theme [PDF]

open access: yesIsrael Journal of Mathematics, 2006
We study closed smooth convex plane curves $ $ enjoying the following property: a pair of points $x,y$ can traverse $ $ so that the distances between $x$ and $y$ along the curve and in the ambient plane do not change; such curves are called {\it bicycle curves}.
openaire   +3 more sources

MOFs and COFs in Electronics: Bridging the Gap between Intrinsic Properties and Measured Performance

open access: yesAdvanced Functional Materials, EarlyView.
Metal‐organic frameworks (MOFs) and covalent organic frameworks (COFs) hold promise for advanced electronics. However, discrepancies in reported electrical conductivities highlight the importance of measurement methodologies. This review explores intrinsic charge transport mechanisms and extrinsic factors influencing performance, and critically ...
Jonas F. Pöhls, R. Thomas Weitz
wiley   +1 more source

Utilizing Vegetation Indices as a Proxy to Characterize the Stability of a Railway Embankment in a Permafrost Region

open access: yesAIMS Geosciences, 2016
Degrading permafrost conditions around the world are posing stability issues for infrastructure constructed on them. Railway lines have exceptionally low tolerances for differential settlements associated with permafrost degradation due to the potential ...
Priscilla Addison   +2 more
doaj   +1 more source

Reference Values for Railway Sidings Track Geometry

open access: yesTransportation Research Procedia, 2016
AbstractRailway sidings are operated at speeds much lower than those used on national railway lines; a typical speed is 6km/h. In establishing reference values for maintenance of railway infrastructure in terms of the geometry for such operating conditions, it is noted that both national and European regulations do not provide specific information ...
LICCIARDELLO, Riccardo   +3 more
openaire   +2 more sources

Bio‐Friendly Artificial Muscles Based on Carbon Nanotube Yarns and Eutectogel Derivatives

open access: yesAdvanced Functional Materials, EarlyView.
Solid‐state artificial muscles based on coiled commercial carbon nanotube yarns coated with eutectogel derivatives exhibit unipolar actuation through selective ion intercalation. Combining polyanionic and polycationic gels enables enhanced contractile stroke and high energy density.
Gabriela Ananieva   +6 more
wiley   +1 more source

Composites for Timber-Replacement Bearers in Railway Switches and Crossings

open access: yesInfrastructures, 2017
Recent developments in composite materials have resulted in their pilot adoption in railway industry, such as ‘fibre-reinforced foamed urethane (FFU)’, ‘geopolymer concrete’, ‘recycled polymer’, and ‘CarbonLoc composite’.
Sakdirat Kaewunruen   +2 more
doaj   +1 more source

On the complexity of braids [PDF]

open access: yes, 2006
We define a measure of "complexity" of a braid which is natural with respect to both an algebraic and a geometric point of view. Algebraically, we modify the standard notion of the length of a braid by introducing generators $\Delta\_{ij}$, which are ...
Dynnikov, Ivan, Wiest, Bert
core   +2 more sources

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