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Počet nalezených dokumentů:
127
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Meteorological elements in the growth and development of selected cereal crop - applicability of regression analysis method
Trnka, M.; Žalud, Z.; Semerádová, Daniela; Dubrovský, Martin
2002 - anglický
Relationships between meteorological elements and the growth and development characteristics of selected cereal crop is assessed.
Klíčová slova:
regression analysis; spring barley
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Meteorological elements in the growth and development of selected cereal crop - applicability of regression analysis method
Relationships between meteorological elements and the growth and development characteristics of selected cereal crop is assessed.
Performance and Reliability of Advanced Telecommunication Systems Using Millimetre Wavelengths in the Czech Republic
Kvičera, V.; Fišer, Ondřej; Mazánek, M.
2001 - anglický
This contribution informs about the launched GACR grant, its aims and methods. The aim is to improve the radio link planning with respect to the influence of the atmosphere. Particular topics are: radio refractive study and measurements, long term rain rate statistics and its stability, experimental measurement of attenuation on 58 GHz link and comparison of predicted and measured atmospheric attenuation.
Klíčová slova:
radio wave propagation; atmospheric attenaation; refractive index
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Performance and Reliability of Advanced Telecommunication Systems Using Millimetre Wavelengths in the Czech Republic
This contribution informs about the launched GACR grant, its aims and methods. The aim is to improve the radio link planning with respect to the influence of the atmosphere. Particular topics are: ...
Response of the outer cusp to the IMF rotation
Šimůnek, Jiří; Šafránková, J.; Němeček, Z.
2001 - anglický
The paper uses the INTERBALL-1 and MAGION=4 data to study the topology and dynamics of high-altitude cusp regions under changing solar wind conditions and interplanetary magnetic field (IMF) orientation. Preliminary analysis of the MAGION-4 ion energy spectra indicates the presence of the magnetosheath-like plasma well below the expected magnetopause position and a large region occupied by low-temperature dense plasma with the very low bulk velocity near the magnetopause.
Klíčová slova:
two point observations; high-altitude cusp; two-point observations
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Response of the outer cusp to the IMF rotation
The paper uses the INTERBALL-1 and MAGION=4 data to study the topology and dynamics of high-altitude cusp regions under changing solar wind conditions and interplanetary magnetic field (IMF) ...
Symmetric probe in drifting plasma
Fiala, Vladimír; Jásenský, Václav; Váňa, Ondřej
2001 - anglický
Here we are presenting a preliminary study of a probe designed for measurement of plasma drift by means of a transfer impedance probe operated near oblique resonance in a magnetized plasma.
Klíčová slova:
plasma drift; Symmetric Probe; resonance cones
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Symmetric probe in drifting plasma
Here we are presenting a preliminary study of a probe designed for measurement of plasma drift by means of a transfer impedance probe operated near oblique resonance in a magnetized plasma.
Numerical simulations of strong Turbulence
Jásenský, Václav; Trávníček, Pavel; Váňa, Ondřej
2001 - anglický
The algorithm developed and tested in our previous paper (Jásenský et al.) for numerical solving of Zakharov equations is used for simulations of strong turbulence. The creation and anihilation of caverns is observed in order to predictions of Zakharov and Robinson theory.
Klíčová slova:
Strong Turbulence; Zakharov Equations; Numeric Simulations Solitons
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Numerical simulations of strong Turbulence
The algorithm developed and tested in our previous paper (Jásenský et al.) for numerical solving of Zakharov equations is used for simulations of strong turbulence. The creation and anihilation of ...
Research of Rain Rate Statistics, Rain Type Recognition and Radio Refractive Index Computation in Space in order to improve the Radiocommunication Planning
Fišer, Ondřej
2001 - anglický
This contribution informs about the contribution of the Institute of Atmospheric Physics in Prague to the described grant of GACR. Particularly it is: radio refractive index study, long term rain rate statistics and its stability as well as rain rate measurements, rain type assessment and experimental measurement of attenuation on 58 GHz link.
Klíčová slova:
radio wave propagation; atmospheric attenaation; refractive index
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Research of Rain Rate Statistics, Rain Type Recognition and Radio Refractive Index Computation in Space in order to improve the Radiocommunication Planning
This contribution informs about the contribution of the Institute of Atmospheric Physics in Prague to the described grant of GACR. Particularly it is: radio refractive index study, long term rain rate ...
Basic Study of the Radio Refractive Index Values in CZ and Sensitivity Tests
Fišer, Ondřej
2001 - anglický
The radio refractive index was computed from the data of radio soundings in Prague and the statistical results are shown.
Klíčová slova:
radio wave propagation; measurements; refractive index
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Basic Study of the Radio Refractive Index Values in CZ and Sensitivity Tests
The radio refractive index was computed from the data of radio soundings in Prague and the statistical results are shown.
Numerical computation of Radiation of Dipole antennas in magnetized plasma
Jásenský, Václav; Trávníček, Pavel; Váňa, Ondřej
2001 - anglický
We are presenting here the computation of electric field of an V-dipole antenna which is a part of OEDIPUS-C experiment. The field is computed using both numerical Filon method and stationary phase method. It seems that for the points sufficiently far-away from the resonance connes both methods give the same result. the field is computed analytically in the cold plasma approximation.
Klíčová slova:
V-dipole anntena; Filon Method; Stationary phase method
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Numerical computation of Radiation of Dipole antennas in magnetized plasma
We are presenting here the computation of electric field of an V-dipole antenna which is a part of OEDIPUS-C experiment. The field is computed using both numerical Filon method and stationary phase ...
Inverse Method for Satellite Radar Investigation of Planetary Geological Properties
Souček, Jan; Trávníček, Pavel
2001 - anglický
Inverse scattering method for reconstruction of dielectric properties of planetary rocks from satellite radar experiments is described.
Klíčová slova:
inverse scattering; radar geology
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Inverse Method for Satellite Radar Investigation of Planetary Geological Properties
Inverse scattering method for reconstruction of dielectric properties of planetary rocks from satellite radar experiments is described.
Analysis of Nonlinear Energy Transfers in Simulated Turbulence of Langmuir Waves
Souček, Jan; Dudok de Wit, T.; Krasnoselskikh, V.; Volokitin, A.
2001 - anglický
Paper presents results of nonlinear analysis of simulated Langmuir turbulence data using high order spectra and Volterra models.
Klíčová slova:
plasma turbulence; Langmuir waves; nonlinear wave interaction
Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR.
Analysis of Nonlinear Energy Transfers in Simulated Turbulence of Langmuir Waves
Paper presents results of nonlinear analysis of simulated Langmuir turbulence data using high order spectra and Volterra models.
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