scholarly journals The Electromagnetic Signature of Outward Propagating Ion-scale Waves

2020 ◽  
Vol 899 (1) ◽  
pp. 74 ◽  
Author(s):  
Trevor A. Bowen ◽  
Stuart D. Bale ◽  
J. W. Bonnell ◽  
Davin Larson ◽  
Alfred Mallet ◽  
...  
Keyword(s):  
Electromagnetic Signature

scholarly journals Analysis of electromagnetic signature of Arabic alphabet as RF elementary coding particles

2015 ◽  
Vol 2 (2) ◽  
pp. 97-106 ◽  
Author(s):  
Oussama Boularess ◽  
Hatem Rmili ◽  
Taoufik Aguili ◽  
Smail Tedjini
Keyword(s):  
The Body ◽  
Lookup Table ◽  
Thin Strip ◽  
Conductive Ink ◽  
Electromagnetic Signature

This paper discusses the electromagnetic (EM) signature of Arabic alphabets that can be considered as standards particles to form chipless tags. Normalized Arial font is suited as example but the method can be applied for any other font. The letters are realized by metallic strips or better, by conductive ink. All the 28 letters have been simulated and their EM signatures for both field polarizations are extracted. It is demonstrated that combining vertical and horizontal responses allow the identification of letters without ambiguity. Moreover, the case of letter with punctuation (one to three points) is considered in more details. Indeed, we propose to modify very slightly these letters by connecting the points to the body of the letters. This connection is made by a unique straight and very thin strip. Under this modification these letters exhibit more exploitable signatures. Finally, a lookup table for identification of the 28 letters is carried out.

Mastering the Electromagnetic Signature of Chipless RFID Tags

2012 ◽  
pp. 146-174 ◽  
Author(s):  
Smail Tedjini ◽  
Etienne Perret ◽  
Arnaud Vena ◽  
Darine Kaddour
Keyword(s):  
Cost Reduction ◽  
Figure Of Merit ◽  
Rapid Development ◽  
Rfid Tags ◽  
Passive Components ◽  
Chipless Rfid ◽  
Electromagnetic Signature ◽  
Coding Capacity ◽  
Global Parameters

The rapid development in wireless identification devices and subsequent applications is at the origin of intensive investigations in order to fulfill various constraints that can exist when implementing applications in practice. Chipless technologies have many advantages. They are fundamentally wireless and powerless devices, and can be all passive components, which potentially means infinite lifetime. However, chipless technology is still in its infancy age, even if it is the most effective for cost reduction. One of the most important features of chipless is coding capacity and ways to imprint it into the device. This chapter will review and discuss various coding techniques. It will address a comparison of the most relevant coding techniques. For sake of clarity some global parameters that can be used as figure of merit will be introduced and applied to compare different practical chipless tags.

scholarly journals Fractal analysis for the ULF data during the 1993 Guam earthquake to study prefracture criticality

2006 ◽  
Vol 13 (4) ◽  
pp. 409-412 ◽  
Author(s):  
Y. Ida ◽  
M. Hayakawa
Keyword(s):  
Fractal Analysis ◽  
Main Shock ◽  
Epicentral Distance ◽  
Sense Of Self ◽  
Low Frequency ◽  
Large Earthquake ◽  
Self Organized ◽  
Self Organized Criticality ◽  
Electromagnetic Signature

Abstract. An extremely large earthquake (with magnitude of 8.2) happened on 8 August 1993 near the Guam island, and ultra-low-frequency (ULF) (frequency less than 1 Hz) electromagnetic fields were measured by 3-axis induction magnetometers at an observing station (with the epicentral distance of 65 km) with sampling frequency of 1 Hz. In order to study electromagnetic signature of prefracture criticality, we have undertaken the fractal (mono-fractal) analysis by means of the Higuchi's method for the ULF data during the 1993 Guam earthquake. Then, it is found that the fractal dimension exhibits five maxima 99, 75, 52, 21, and 9–4 days before the earthquake main shock, which suggests the ULF electromagnetic signature of nonlinear evolution (in the sense of self-organized criticality) taking place in the lithosphere just before the 1993 large Guam earthquake. That is, there take place step-like changes in the lithosphere during the long-term of the order of several months before the main shock.

scholarly journals The electromagnetic signature of jets

2004 ◽  
Vol 30 (8) ◽  
pp. S1013-S1016 ◽  
Author(s):  
Charles Gale ◽  
T C Awes ◽  
Rainer J Fries ◽  
Dinesh K Srivastava
Keyword(s):  
Electromagnetic Signature

Multi-dipole modeling of XLPE cable for electromagnetic field studies in large power systems

2013 ◽  
Vol 33 (1/2) ◽  
pp. 3-13
Author(s):  
Mohammadreza Barzegaran ◽  
Osama A. Mohammed
Keyword(s):  
Power Systems ◽  
Field Studies ◽  
Electrical Machine ◽  
Large Power ◽  
Content Type ◽  
Xlpe Cable ◽  
Electric And Magnetic Fields ◽  
Dipole Modeling ◽  
Electromagnetic Signature ◽  
Actual Geometry

Purpose – In this paper, modeling of the XLPE cable for electromagnetic signature study at a far distance is proposed. The paper aims to discuss these issues. Design/methodology/approach – Due to the very small ratio of the dimensions of cables to the dimensions of the whole system, using actual geometry of the cables with all layers in this study causes deformation of the cable's model. Therefore, multi-dipole modeling is used for modeling the cables. Findings – This model includes specific voltages and currents in lines and nodes, respectively. Radiated electric and magnetic fields at a far distance are selected as the index of appropriateness of the model. Originality/value – In order to investigate the accuracy of the model, various configuration of the cable is studied. Additionally, coupling of the cable with an electrical machine is investigated. They all show that the equivalent models can be used in place of the actual model for signature studies.

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