Measurement of the extremely low frequency magnetic field in the laptop neighborhood
Journal Title: Revista Facultad de IngenierĂa-Universidad de Antioquia - Year 2015, Vol 1, Issue 76
Abstract
The paper considers the level of the extremely low frequency magnetic fi eld produced by the portable computers. Accordingly, the magnetic fi eld characterized with the low frequencies up to 300 Hz has been measured. The experiment consists of testing 10 different portable computers in normal operating condition and under heavy load. The measurement of the magnetic fi eld is performed in the laptop neighborhood. The measured data are presented and discussed. They are compared with the magnetic fi eld safe limit values suggested by MPR II, TCO, ICNIRP, the SMEMSP (Serbian Ministry of Environment, Mining and Spatial Planning), and those given in the literature. It is shown that some of the portable computers radiate a very strong magnetic fi eld. Hence, they should be used with caution.
Authors and Affiliations
Darko Brodic
Effect of the functionalization of silica nanoparticles as a reinforcing agent on dental composite materials
The present study evaluated the effect of silica nanoparticle aggregation state on the reflectance and crystallinity of dental composite materials. Two types of silica nanoparticles (ca. 10 nm): Aerosil 200 non-funcional...
Experimental characterization of thermal hydraulic performance of louvered brazed plate fin heat exchangers
Louvered fins are commonly used in compact heat exchangers to increase the surface area, turbulence, and initiate new boundary layer growth required to improve the heat transfer performance without a significant increase...
Graphene samples preparation and some possible uses in developing optical communication devices
Graphene is a two-dimensional material which has been attracting the attention of worldwide scientific community, motivated by their optical and electronic properties. There are different methods for obtaining grapheme;...
Acoustic and mechanic characterization of materials used in manufacturing the soundboard of the spanish guitar: influence in the sonority
This paper presents a study relating the most commonly used materials in manufacturing the top plate of the Spanish guitar and some sound characteristics such as timbre, volume, and duration. Theoretically, the wood infl...
Band-Pass filters using OSRR cells
This paper presents the design process (including optimization and characterization) of a band-pass filter through the use of OSRR-structured meta-material cells over micro-strip substrates. The proposed design, which st...