scholarly journals On the Temperature Distribution Inside a Tree Under Fire Conditions

1991 ◽  
Vol 1 (2) ◽  
pp. 87 ◽  
Author(s):  
JJ Costa ◽  
LA Oliveira ◽  
DX Viegas ◽  
LP Neto
Keyword(s):  
Cross Section ◽  
Heat Conduction Equation ◽  
Numerical Scheme ◽  
Unit Length ◽  
Circular Cross Section ◽  
Time Dependent ◽  
Tree Trunk ◽  
Temperature Field Distribution ◽  
Ground Fire ◽  
Fire Conditions

A simple and efficient numerical scheme is presented for the prediction of temperature field distribution inside a tree trunk subjected to ground fire conditions. The trunk is modelled by a cylinder of circular cross section and unit length, through which the time-dependent heat conduction equation is numerically integrated. The model is partly validated in laboratory and then applied to the case of a prescribed ground fire inside a Pinus pinmter stand.

Twisted non-Abelian vortices

2016 ◽  
Vol 31 (28n29) ◽  
pp. 1645046
Author(s):  
Péter Forgács ◽  
Árpád Lukács ◽  
Fidel A. Schaposnik
Keyword(s):  
Angular Momentum ◽  
Cross Section ◽  
Unit Length ◽  
Cylindrical Symmetry ◽  
Time Dependent ◽  
Fundamental Representation ◽  
Rotationally Symmetric ◽  
Twisted String ◽  
Gauss Type ◽  
Symmetric Gauge

Twisted non-Abelian flux-tube solutions are considered in the bosonic sector of a 4-dimensional [Formula: see text] super-symmetric gauge theory with U(2)[Formula: see text] symmetry, with two scalar doublets in the fundamental representation. Twist refers to a time-dependent matrix phase between the two doublets, and twisted strings have nonzero (global) charge, momentum, and in some cases even angular momentum per unit length. The planar cross section of a twisted string corresponds to a rotationally symmetric, charged non-Abelian vortex, satisfying 1st order Bogomolny-type equations and Gauss-type constraints. Quite unexpectedly some twisted strings lack cylindrical symmetry in [Formula: see text].

SAF file: It's really three dimensional file

2018 ◽  
Vol 14 (1) ◽  
pp. 1
Author(s):  
Prof. Dr. Jamal Aziz Mehdi
Keyword(s):  
Cross Section ◽  
Root Canal ◽  
Three Dimensional ◽  
Circular Cross Section ◽  
Circular Motion ◽  
Root Canal Treatment ◽  
Metal Core ◽  
Rotating Blade

The biological objectives of root canal treatment have not changed over the recentdecades, but the methods to attain these goals have been greatly modified. Theintroduction of NiTi rotary files represents a major leap in the development ofendodontic instruments, with a wide variety of sophisticated instruments presentlyavailable (1, 2).Whatever their modification or improvement, all of these instruments have onething in common: they consist of a metal core with some type of rotating blade thatmachines the canal with a circular motion using flutes to carry the dentin chips anddebris coronally. Consequently, all rotary NiTi files will machine the root canal to acylindrical bore with a circular cross-section if the clinician applies them in a strictboring manner

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