Results 101 to 110 of about 406,051 (283)

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

Skeleton Driven Non-rigid Motion Tracking and 3D Reconstruction

open access: yes, 2018
This paper presents a method which can track and 3D reconstruct the non-rigid surface motion of human performance using a moving RGB-D camera. 3D reconstruction of marker-less human performance is a challenging problem due to the large range of ...
Denman, Simon   +4 more
core   +1 more source

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

open access: yesAdvanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner   +4 more
wiley   +1 more source

ُSome Remarks on Modern Track Geometry Maintenance [PDF]

open access: yesInternational Journal of Railway Research, 2018
A short survey on modern track maintenance methods is given, concentrating on the developments in recent years. The ongoing refinement of the machinery should be shown as the influence of IT-solutions. On top the economic view to the track infrastructure
Klaus Riessberger
doaj  

On the need to complement the norms on easement for gauge width

open access: yesВестник Научно-исследовательского института железнодорожного транспорта, 2017
The current evaluation system of track geometry provides supervision of standards for graduation of the gauge and speed limits at excess of allowable values.
V. O. Pevzner   +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

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

Evaluating railway track support stiffness from trackside measurements in the absence of wheel load data

open access: yes, 2016
It is generally accepted that track support stiffness is a major factor controlling rates of track geometry deterioration, particularly where the track support stiffness changes abruptly.
Le Pen, Louis   +3 more
core   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

open access: yesAdvanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova   +9 more
wiley   +1 more source

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