ESTIMATING SHADOW-ZONE PARAMETERS OF TROPOSPHERIC REFRACTION FROM THE RADIATION OF REMOTE SOURCES. PART II: EXPERIMENT

2015 ◽  
Vol 74 (10) ◽  
pp. 865-875
Author(s):  
V. A. Kabanov ◽  
G. M. Morgun ◽  
V. B. Sinitski ◽  
I.S. Tourgenev
Keyword(s):  
Shadow Zone ◽  
Zone Parameters ◽  
Tropospheric Refraction

Un inédit de Marcel Mauss

2003 ◽  
Vol 44 (1) ◽  
pp. 3-26
Author(s):  
CHRISTIAN PAPILLOUD
Keyword(s):  
Intellectual Life ◽  
Shadow Zone

Marcel Mauss never provides us with his conception of politics as he conceives it as a scientific. However, this relationship would have been clear for the scholars who dealt with his life and works. The unpublished text that we present will not only enlighten this shadow zone. It also presents the idea of politics cultivated by Mauss as the scientific he was in the last moments of his intellectual life.

scholarly journals Subsurface ocean argon disequilibrium reveals the equatorial Pacific shadow zone

2006 ◽  
Vol 33 (18) ◽  
pp. n/a-n/a ◽  
Author(s):  
Eric Gehrie ◽  
David Archer ◽  
Steven Emerson ◽  
Charles Stump ◽  
Cara Henning
Keyword(s):  
Equatorial Pacific ◽  
Shadow Zone ◽  
Subsurface Ocean

Mathematical simulation of seamless pipes extrusion and rational calibration of die

2021 ◽  
Vol 77 (1) ◽  
pp. 70-79
Author(s):  
S. R. Rakhmanov
Keyword(s):  
Mathematical Simulation ◽  
Deformation Zone ◽  
Metal Flow ◽  
Flow Speed ◽  
Zone Length ◽  
Technology Application ◽  
Extrusion Press ◽  
Length Increase ◽  
Die Profile ◽  
Zone Parameters

Technology of seamless pipes production by extrusion enables to deform pipe workpieces made of low-plastic materials. However, low durability of the working instrument restricts the area of the technology application. The purpose of the work was to specify optimal parameters of technological processes of pipes extrusion. Minimization of energy and force parameters of the deformation zone and an increase of once-only metal deformation were accepted as criteria. They will enable to increase the presses productivity, increase durability of working instrument and accuracy of pipes geometric dimensions. A mathematical model of deformation zone and stressed state of pipe workpiece were elaborated. Influence of the die generatrix calibration and deformation zone parameters on the character of energy and force parameters change revealed. Dependence of energy and force parameters on the die calibration and geometric parameters of deformation zone for the press 50 MH was established. The results of mathematical simulation of pipes extrusion showed that along the whole deformation zone length, increase of metal flow speed results in an increase of tangential and normal stresses on the forming mandrel and calibrated die. The task of parametric optimization of die profile (calibration) was accomplished in interpretation of base variation Euler’s task for a determined functional of pipes extrusion. It was established that while the extrusion speed is increasing, the energy and force parameters of the deformation zone are getting pronounced dynamic character. At that, by optimization of die calibration, an increase of the extrusion press 50MH working instruments durability was reached, as follows: dies – by two times, mandrels – by 4 times, container bushes – by 40% and press-washers – by 2 times.

Edge diffraction of a narrow beam of millimeter waves in the shadow zone of an obstacle

2007 ◽  
Vol 52 (10) ◽  
pp. 1089-1094
Author(s):  
G. A. Andreev ◽  
D. A. Korbakov ◽  
A. V. Yudaev
Keyword(s):  
Millimeter Waves ◽  
Narrow Beam ◽  
Shadow Zone ◽  
Edge Diffraction
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