0000000000249288

AUTHOR

Mara Gulbe

showing 3 related works from this author

Quantitative Characteristics of Information Society and ICT Industry in Latvia

2015

Abstract The article is devoted to statistical analysis of information and communication technology (ICT) industry in Latvia and the development of Information Society in the country. On the basis of statistical data comparison of Latvia with other European countries is made. This comparison shows that Latvia belongs to countries with very well developed Internet. On the other hand the statistical data points on the fact that it is necessary to increase the awareness of population regarding possibilities offered by using of ICT and e-Government.

Economic growtheducation.field_of_studybusiness.product_categoryInformation societybusiness.industryPopulationGeneral EngineeringEnergy Engineering and Power Technologystatistical dataData pointstatistical analysisInformation and Communications TechnologyRegional scienceInternet accessThe InternetStatistical analysisbroadband Internet ;Information societyeducationbusinessICT industryProcedia Economics and Finance
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A Simple Approach for Determination of Numerical Values of Ferrite Nonlinear Susceptibilities

2020

This article presents a straightforward approach for determination of numerical values of nonlinear susceptibilities of soft magnetic ferrites. It is shown that numerical values of susceptibilities can be calculated from the measured amplitudes of harmonics in the output voltage of ferrite core transformer. For this purpose, useful expressions for the susceptibilities are derived and as example, numerical values of the largest nonlinear susceptibilities those of the third and fifth orders are calculated. Additionally, errors of the measured susceptibilities also are determined. Based on the expressions obtained, the analysis of phase shifts between components of flux density on different fr…

010302 applied physicsPhysics01 natural sciencesFerrite coreElectronic Optical and Magnetic Materialslaw.inventionMagnetic fieldComputational physicsThird orderNonlinear systemAmplitudelawHarmonics0103 physical sciencesFerrite (magnet)Electrical and Electronic EngineeringTransformerIEEE Transactions on Magnetics
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Numerical values of MnZn ferrite nonlinear susceptibilities in a lossless approximation

2017

On the basis of expressions for nonlinear magnetic susceptibilities of soft ferrites obtained earlier the analysis of phase shifts between components of flux density on different frequencies and the magnetic field strength is carried out. Only the largest nonlinear susceptibilities those of third and fifth order are considered. It is shown that in the frequency range where losses are small and can be neglected the susceptibility of third order is negative but that of fifth order is positive. These statements allow explaining the shape of output voltage of toroidal transformer with soft ferrite core induced by strong harmonic field strength in the input. Numerical values of nonlinear suscept…

010302 applied physicsPhysicsCondensed matter physics020206 networking & telecommunicationsField strength02 engineering and technology01 natural sciencesFerrite corelaw.inventionMagnetic fieldNonlinear systemThird orderlawHarmonics0103 physical sciences0202 electrical engineering electronic engineering information engineeringFerrite (magnet)Transformer2017 IEEE 58th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)
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