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Frequency of worldwide terroristic acts since the end of sixties
Střeštík, Jaroslav ; Grigoryev, P. ; Mikulecký, M.
The analysis was performed on the eight geopolitical areas (Africa, Eastern Europe, Middle East and Persian Gulf, North America, Central and South America, South-East Asia and Oceania, South Asia, and Western Europe), on their sum and on the solar and geomagnetic variables. There is a good correlation between frequencies of terroristic attacks in different regions. There is also a strong connection between terroristic attacks on one side and some heliogeophysical factors on the other side. All connections are different for different regions and external factors, respectively. Nevertheless, most of them are significant. The relationship to factors describing geomagnetic activity is a little higher than that for factors of solar activity.
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Salmonellosis and some solar and geomagnetic parameters
Střeštík, Jaroslav ; Mikulecký Jr., M. ; Mikulecký, M.
Salmonellosis is a common infection in our country and therefore it is necessary to investigate which factors contribute to the increase of its incidence. The influence of tidal acceleration has been investigated earlier and some semilunar variations have been found. The influence of heliogeophysical factors was not investigated though laboratory studies proved some connections. In this contribution daily numbers of hospital admissions at the Infectology Clinic in Bratislava from 2005-2006 have been used. The incidence of salmonellosis is considerably higher in summer than in winter, the maximum of incidence appears after the maximum of air temperature with a time shift more than one month. The higher geomagnetic activity contributes to higher incidence of salmonellosis too. Its influence is more significant than that of solar activity.
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History of magnetic measurements in Bohemia and long-term changes of ge.magnetic field components
Střeštík, Jaroslav
Regular measurement of components of the Earth's magnetic field started in Klementinum in Prague in 1830 as the first on the European continent, and finished in 1926. Contemporary Czech geomagnetic observatories cover the period since 1952 till now. Together with the data from Niemegk it is possible to convert all values so that a coherent series 1830-2007 can be prepared. Magnetic declination increases during the whole period, the speed of the increase regularly varies with the period of about 74 years. The last minimum was observed in 1910, maximum in 1947. The intensity of the field in the horizontal component varies too with nearly the same period and nearly the same positions of maxima and minima.
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The analyse of data and spectral resolution of spectrometers with image sensores
Oupický, Pavel
At present time multi channel filter is developed within grant in IPP AS CR, v.v.i. It will enable to observe solar phenomena in several interesting working wavelengths. This filter is composed of five members and possesses long optical interval of parallel beams. In this paper we present several variants of imaging systems of spectrograph which are optimized for this filter.
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The Corrector of Volosov
Rail, Zdeněk ; Jareš, Daniel ; Lédl, Vít
Soon after discovery of meniscus telescope of Maksutov optical properties of doublet corrector was researched. Doublet was placed into parallel light beam in front of common optical system. Afocal corrector composed of two thin lenses of the same glass enables to correct optical aberrations of many systems and to reach radical improvement of their imaging properties. Compared to Schmidt plate doublet corrector possesses only spherical surfaces and its manufacturing tolerances are much freer than meniscus of Maksutov. Derivation of main equations was performed by Volosov, Galpern and Grebenshchikova in 1943. Our paper deals with optical aberrations of the system consisting of common aspherical mirror and corrector of Volosov. These systems are less known among opticians and astronomers but enable construction of fast cameras and telescopes.
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Impacts of human activity on the upper atmosphere
Laštovička, Jan
Trends in the mesospheric temperature, electron concentration in the lower ionosphere, electron concentration and height of its maximum in the E region, electron concentration in the F1-region maximum, thermospheric neutral density and F-region ion temperature qualitatively agree with consequences of the enhanced greenhouse effect and form a consistent pattern of global change in the upper atmosphere. Three groups of parameters were identified as not-fitting this global pattern, the F2 region ionosphere, mesospheric water vapour, and the mesosphere/lower thermosphere dynamics. The paper reports progress in development of the global pattern of trends with emphasis to these three open problems. There are several other factors contributing to long-term trends, namely the stratospheric ozone depletion, mesospheric water vapour concentration changes, long-term changes of geomagnetic activity and of the Earth’s magnetic field.
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