The influence of the mesoscale turbulence in lower thermosphere-upper mesosphere on the mid-latitude sporadic E-layer

In this paper we discuss the influence of mesoscale turbulence in lower thermosphere, measured by radiometeor method, on the characteristics of Es layers, as observed by ionospheric sounding. Mesoscale turbulence has a considerable influence on the average daily values and inter-daily variations of the blanketing frequency fbEs, critical frequency foEs and semi-transparency δfbEs of the Es layer. More intense, probably semi-transparent, Es layers occur during periods of less developed mesoscale turbulence, while weak blanketing Es layers occur when values of turbulence in the lower thermosphere are increased, both in daytime and night-time, for all seasons. © 1997 COSPAR. Published by Elsevier Science Ltd

The influence of the irregular movements in the lower thermosphere on the ionospheric Es-Layer by radiometeor observations in Kazan (56°N, 49°E)

Significant influence of diurnal and interdiurnal variations of irregular movements at heights of the lower thermosphere on the frequency parameters of ionospheric sporadic E-layer, characterizing its intensity, was found out. Common periodicities with time scales of planetary waves, having significant coherence, were revealed in variations of mesoscale turbulence intensity and critical frequency foEs, blanketing frequency fbEs. © 2001 Elsevier Science Ltd. All rights reserved

Time variations of dynamical processes in the midlatitude upper mesophere - Lower thermosphere

Complex studies with the use of spectrum and harmonic analysis allow determination of wave disturbances in the prevailing and tidal wind, and also mesoscale short period oscillation intensity per unit mass. We particularly find enhanced periods of 4-6, 9-12, 15-20, 25-30 days, which are typical for planetary waves in the lower and middle atmosphere of the Earth. We also reveal the non-linear character of vertical amplitude and phase profiles for wave disturbances with planetary wave scales in the prevailing, tidal and short period oscillation intensity. This non-linearity is interpreted as a consequence of the non-linear interaction of waves such as internal gravity waves, tides and planetary waves among themselves and with background movements. © 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved

Vygotsky in English: What Still Needs to Be Done

At present readers of English have still limited access to Vygotsky’s writings. Existing translations are marred by mistakes and outright falsifications. Analyses of Vygotsky’s work tend to downplay the collaborative and experimental nature of his research. Several suggestions are made to improve this situation. New translations are certainly needed and new analyses should pay attention to the contextual nature of Vygotsky’s thinking and research practice

Time variations of dynamical processes in the midlatitude upper mesophere - Lower thermosphere

Complex studies with the use of spectrum and harmonic analysis allow determination of wave disturbances in the prevailing and tidal wind, and also mesoscale short period oscillation intensity per unit mass. We particularly find enhanced periods of 4-6, 9-12, 15-20, 25-30 days, which are typical for planetary waves in the lower and middle atmosphere of the Earth. We also reveal the non-linear character of vertical amplitude and phase profiles for wave disturbances with planetary wave scales in the prevailing, tidal and short period oscillation intensity. This non-linearity is interpreted as a consequence of the non-linear interaction of waves such as internal gravity waves, tides and planetary waves among themselves and with background movements. © 2001 COSPAR. Published by Elsevier Science Ltd. All rights reserved

The influence of the irregular movements in the lower thermosphere on the ionospheric Es-Layer by radiometeor observations in Kazan (56°N, 49°E)

Significant influence of diurnal and interdiurnal variations of irregular movements at heights of the lower thermosphere on the frequency parameters of ionospheric sporadic E-layer, characterizing its intensity, was found out. Common periodicities with time scales of planetary waves, having significant coherence, were revealed in variations of mesoscale turbulence intensity and critical frequency foEs, blanketing frequency fbEs. © 2001 Elsevier Science Ltd. All rights reserved

The influence of the irregular movements in the lower thermosphere on the ionospheric Es-Layer by radiometeor observations in Kazan (56°N, 49°E)

Significant influence of diurnal and interdiurnal variations of irregular movements at heights of the lower thermosphere on the frequency parameters of ionospheric sporadic E-layer, characterizing its intensity, was found out. Common periodicities with time scales of planetary waves, having significant coherence, were revealed in variations of mesoscale turbulence intensity and critical frequency foEs, blanketing frequency fbEs. © 2001 Elsevier Science Ltd. All rights reserved