We Continue the Work of Those
Who Were the First.

  • Electrical Engineering
  • Light & Lighting
  • Power Engineering
  • Transportation
  • Automation
  • Communication
  • Smart Buildings
  • Industry
  • Innovation

Current issue

ELEKTRO 5/2018 was released on May 16th 2018. Its digital version will be available on June 6th 2018.

Topic: Lightning and overvoltage protection; EFS, EPS; ELO SYS 2018

Main Article
Energy router and its role in smart grids
Smart Cities (part 2 – volume 1)

SVĚTLO (Light) 2/2018 was released on March 16th 2018. Its digital version will be available immediately.

Fairs and exhibitions
Interior elite again after year in Letňany

Luminaires and luminous apparatuses
Emergency lighting
The future of industrial lighting has name INNOVA
GOLY luminaire – the practical high bay luminaire
McLED® – brand name of first rate quality LED lighting
VOLGA EU luminaire our choice for Europe

3-D printed active metamaterials for sound and vibration control

13.04.2018 | University of Southern California | viterbischool.usc.edu

A team led by USC Viterbi researchers developed 3-D printed acoustic metamaterials that can be switched on and off remotely using a magnetic field.

Researchers have been pushing the capabilities of materials by carefully designing precise structures that exhibit abnormal properties that can control acoustic or optical waves. However, these metamaterials are constructed in fixed geometries, meaning their unique abilities are always fixed. Now, new 3-D printed metamaterial developed by a team led by USC Viterbi researchers can be remotely switched between active control and passive states.

3-D printed active metamaterials

Metamaterials can be used to manipulate wave phenomena such as radar, sound and light and have been used to develop technology such as cloaking devices and improved communication systems. The team’s metamaterials are able to control environmental sounds and structural vibrations, which have similar waveforms. By 3-D printing a deformable material containing iron particles in a lattice structure, their metamaterials can be compressed using a magnetic field.

Read more at University of Southern California

Image Credit: Qiming Wang

-jk-