Topic
Shields
About: Shields is a research topic. Over the lifetime, 1456 publications have been published within this topic receiving 10896 citations.
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TL;DR: In this paper, the authors compared several formulae for the evaluation of the shielding efficiency of planar and cylindrical shields of infinite structure with the Finite Element Method (FEM) to assess their range of applicability.
Abstract: In industrial applications, efficient shields are often required to prevent electromagnetic interference. In the past, several formulae for the evaluation of the shielding efficiency were proposed. This paper is aimed at the comparison of their results with the Finite Element Method, in order to assess their range of applicability. Evidence is given that expressions determined for planar and cylindrical shields of infinite structure can be suitably used to estimate the shielding efficiency of more realistic shaped shields.
4 citations
TL;DR: In this article , the interactive mechanism of EM waves with biological systems and proposed reliable approaches for safeguarding vulnerable biological systems using various nanostructural designs, such as fibrous materials and their various configurations, to protect vulnerable entities from incident EM waves.
4 citations
03 Oct 1988
TL;DR: In this article, two cold shields for infrared detectors are described, with which the signal-to-noise ratio (SNO) was considerably improved, and the uniformity of the pictures was improved and the formation of undesirable background patterns was successfully eliminated.
Abstract: New cold shields for infrared detectors are described, with which the signal-to-noise ratio was considerably improved. The function of two of these cold shields is based upon the use of intermediate images which make it possible to shield off housing radiation at very small incident angles to the optical axis. With these cold shields, the uniformity of the pictures was improved and the formation of undesirable background patterns was successfully eliminated.
4 citations
Patent•
10 Apr 2017
TL;DR: In this article, a plurality of laser scanners are used to establish light shields in an area to be monitored, with each of the light shields including at least one detection zone, and a controller to detect unauthorized entry to the area based on a position and timing of breaks in the detection zones of light shields.
Abstract: A security system includes a plurality of laser scanners to establish light shields in an area to be monitored, with each of the light shields including at least one detection zone, and a controller to detect unauthorized entry to the area to be monitored based on a position and timing of breaks in the detection zones of the light shields.
4 citations
TL;DR: In this article, the authors used the finite element method to describe the condition of closing the cable shields at both ends of the cable and solved the problem in two-dimensional formulation.
Abstract: The study tested the process of the magnetic field (MF) mitigation in the HV three-phase power cable lines (CL) made of single core cables in two-ends bonding of their shields. Developed the technique of numerical simulation and calculation of the MF of CL based on its axisymmetric calculation model using the finite element method that allowed to describe the condition of closing the cable shields at the both ends of the CL and solve the problem in two-dimensional formulation. The authors show the possibility of MF mitigation of the three-phase CL by increasing the cross-section of closed cable shields, which in some cases may be an alternative to external electromagnetic shields. Obtained and experimentally validated in laboratory and field conditions with an accuracy of no more than 5 % the value of mitigation coefficients of MF of three-phase three-wire CL in two-ends bonding of their shields depending on the technical parameters of the cables and the geometry of their installation, which is important for the design of new cable power lines. Their values are in the range from 0.99 to 0.32 when the cross sections of cable shields are from 25 mm2 to 200 mm2 and the distance between the axes of the cables are from 0.1 to 0.5 m. The results show the ability to execute design of cable power lines in residential areas, taking into account both the sanitary standards of the MF, as well as to energy efficiency.
4 citations