On the feasibility of using the spiral beam formalism for analysis of cardiograms

2019 ◽  
Vol 49 (1) ◽  
pp. 83-88
Author(s):  
V G Volostnikov ◽  
S A Kishkin ◽  
S P Kotova ◽  
M S Rusakova
Keyword(s):  
Spiral Beam

scholarly journals SPIRAL BEAM ACCELERATOR MODEL RESULTS

1953 ◽  
Author(s):  
S. A. Colgate ◽  
A. J. Schwemin
Keyword(s):  
Spiral Beam

Fourier Analysis of the Wave Number of Unstable Waves in a Spiral Beam-Plasma System

1983 ◽  
Vol 22 (Part 1, No. 5) ◽  
pp. 842-843
Author(s):  
Toshitaka Idehara ◽  
Kunihiko Usami
Keyword(s):  
Fourier Analysis ◽  
Wave Number ◽  
Plasma System ◽  
Beam Plasma ◽  
Spiral Beam

scholarly journals Orbital angular momentum of the spiral beams

2019 ◽  
Vol 43 (3) ◽  
pp. 504-506
Author(s):  
V.G. Volostnikov
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Solid Body ◽  
The Other ◽  
Other Hand ◽  
Spiral Beam

At first sight, any rotation generates some angular momentum (it is true for a solid body). But these characteristics (rotation and orbital angular momentum) are rather different for optics and mechanics. In optics there are the situation when the rotation is important. On the other hand, there are the cases where the nonzero orbital angular momentum is necessary. The main goal of this article is to investigate a relationship between a rotation under propagation of spiral beam and its angular momentum. It can be done the following conclusion: there is no any relation between rotation under propagation of spiral beam and its OAM.

Zero Torque Compliant Mechanisms Employing Pre-buckled Beams

2020 ◽  
Vol 142 (11) ◽  
Author(s):  
Pietro Bilancia ◽  
Samuel P. Smith ◽  
Giovanni Berselli ◽  
Spencer P. Magleby ◽  
Larry L. Howell
Keyword(s):  
Analytical Approach ◽  
Compliant Mechanisms ◽  
Negative Stiffness ◽  
Rotational Degree ◽  
Annular Domain ◽  
Archimedean Spiral ◽  
Element Analysis ◽  
Buckled Beams ◽  
Physical Prototype ◽  
Spiral Beam

Abstract The concept of a statically balanced mechanism with a single rotational degree-of-freedom is presented. The proposed device achieves static balancing by combining positive stiffness elements and negative stiffness elements within an annular domain. Two designs are discussed. The first is composed of an Archimedean spiral and two pinned-pinned pre-buckled beams. The overall mechanism is modeled via an analytical approach and the element dimensions are optimized. The optimal configuration is then tested through finite element analysis (FEA). A second approach replaces the spiral beam with elastic custom-shaped spline beams. A FEA optimization is performed to determine the shape and size of such spline beams. The behavior of the negators is used as reference for the optimization so as to achieve a complete balancing. A physical prototype of each configuration is machined and tested. The comparison between predicted and acquired data confirmed the efficacy of the design methods.

scholarly journals Instability of the fast cyclotron wave in a spiral beam-plasma system

1978 ◽  
Vol 68 (5-6) ◽  
pp. 442-444 ◽  
Author(s):  
T. Idehara ◽  
M. Tanaka ◽  
Y. Ishida
Keyword(s):  
Plasma System ◽  
Beam Plasma ◽  
Spiral Beam
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