Determining the amplitude-frequency characteristics of linear-dimensions discrete transducers by means of a subtraction circuit

Droplets in atmospheric and electrosprayed aerosols carry more often than less, a multitude of ions. We address the question of the location of a collection of ions in charged aqueous droplets with linear dimensions in the nanometer<br>range using atomistic molecular dynamics and analytical theory. All the details of the computations have been described in the manuscript.<br>

Download Full-text

Where Do the Ions Reside in a Highly Charged Droplet?

10.26434/chemrxiv.7994309 ◽

2019 ◽

Author(s):

Victor Kwan ◽

Anatoly Malevanets ◽

Styliani Consta

Keyword(s):

Molecular Dynamics ◽

Analytical Theory ◽

Charged Droplet ◽

Linear Dimensions

Droplets in atmospheric and electrosprayed aerosols carry more often than less, a multitude of ions. We address the question of the location of a collection of ions in charged aqueous droplets with linear dimensions in the nanometer<br>range using atomistic molecular dynamics and analytical theory. All the details of the computations have been described in the manuscript.<br>

Download Full-text

THE STUDY OF THE INDIVIDUAL VARIABILITY OF THE LINEAR DIMENSIONS OF THE SPHENOID SINUS

The Journal of scientific articles Health and Education millennium ◽

10.26787/nydha-2226-7425-2019-21-1-64-70 ◽

2019 ◽

Vol 21 (1) ◽

pp. 64-70

Author(s):

O.V. Mareev ◽

◽

G.O. Mareev ◽

M.E. Gutynina ◽

D.A. Maksimova ◽

...

Keyword(s):

Sphenoid Sinus ◽

Individual Variability ◽

Linear Dimensions ◽

The Individual

Download Full-text

New aspects of power grid facilities personnel workplaces electromagnetic environment

Russian Journal of Occupational Health and Industrial Ecology ◽

10.31089/1026-9428-2020-60-9-569-574 ◽

2020 ◽

Vol 60 (9) ◽

pp. 569-574

Author(s):

Nina B. Rubtsova ◽

Sergey Yu. Perov ◽

Olga V. Belaya ◽

Tatiana A. Konshina

Keyword(s):

Transmission Lines ◽

Power Transmission ◽

Power Grid ◽

Spectral Characteristics ◽

Ground Level ◽

Frequency Characteristics ◽

Frequency Range ◽

Electromagnetic Environment ◽

Limit Values ◽

Special Assessment

Introduction. Electromagnetic safety of power grid facilities staff requires the exclusion of electromagnetic fields (EMF) harmful effects. EMF is evaluated by 50 Hz electric and magnetic fields (EF and MF) values in the framework of working conditions special assessment, and very rarely the analysis of the electromagnetic environment (EME) is carried out in depth. The aim of the study - EME hygienic assessment of power grid EHV facilities personnel workplace with adequate 50 Hz EF and MF levels evaluation as well as the analysis of EF and MF in the frequency range from 5 Hz to 500 Hz amplitude-frequency characteristics. Materials and methods. 50 Hz EF and MF values assessment was carried out on open switchgears (S) of substations and within sanitary breaks of 500 and 750 kV overhead power transmission lines (OTL). Measurements along to OTL trasses was performed using matrix-based method. Measurements and analysis of EF and MF values in 5-500 Hz frequency range amplitude-frequency characteristics were performed in the territory of 500 and 750 kV S. Results. Power frequency 50 Hz measurements results at 500 and 750 kV S ground-level personnel workplaces showed the presence of an excess of permissible limit values by EF intensity and the absence of an excess by MF. The measured EF values within 500 and 750 kV OTL sanitary gaps require limiting the working time of linemen due to the excess of the hygienic norms for full work shift, while the MP levels were almost completely within the standard values for persons not occupationally connected with electrical installations maintenance. MF and EE frequency range from 50 Hz to 500 Hz spectral characteristics analysis showed that 3rd harmonic percentage does not exceed 2.5% for EF and 6% for MF of the main level, the level of the 5th harmonic does not exceed 1% for EF and 3.5% for MF, the level of the 7th harmonic does not exceed 0.2% for EF and 0.8% for MF. These data show despite its low levels the contribution of MF different harmonics in a possible adverse impact on humane than EF corresponding harmonics. Conclusions. There was the confirmation of the previously justified use of the "matrix" scheme for of EF and MF values measurement along OTL routes. The relevance of to EF and MF all frequency components expos ure assessing possible health risk in extremely high voltage S territories and under OTL, based on international recommendations due to the lack of sanitary regulations in the Russian Federation for >50 Hz-30 kHz EF and MF, is shown.

Download Full-text