No (197)
Number of found documents:
197
Published from
to
Twenty years of monitoring of the stability of the hazardous slopes of Krušné hory Mts. with precise tiltmeters
Chán, Bohumil
2003 - Czech
Twenty years ago the coal open pit mining in the North Bohemia under Krušné hory Mts. was started. To avoid possible accidents a complex system of monitoring in this area affected by mining was established. Před dvaceti lety byla zahájena těžba uhlí v severních Čechách pod Krušnými horami velkolomovou metodou. Aby se předešlo možné katastrofě, byl v této oblasti vybudován komplexní varovný systém.
Keywords:
coal mining; monitoring; The Ore Mountains
Available at various institutes of the ASCR
Twenty years of monitoring of the stability of the hazardous slopes of Krušné hory Mts. with precise tiltmeters
Twenty years ago the coal open pit mining in the North Bohemia under Krušné hory Mts. was started. To avoid possible accidents a complex system of monitoring in this area affected by mining was ...
Natural and artificial variations in the natality in Slovakia
Střeštík, Jaroslav; Mikulecký, M.; Žirko, M.
2003 - Czech
Daily numbers of births in Slovakia 1996-2001 were taken into calculations. In the annual variation a trough occurs from October to December, and short sharp minima during holidays. In the spectrum only annual and 7-day period supplemented by their higher harmonics can be found. No trace of lunar variation has been bound. Všechna data v této práci pocházejí ze Statistického úřadu Slovenské republiky. K dispozici máme denní počty narozených dětí na celém Slovensku v letech 1996 až 2001. Všechny zde nalezené variace kromě pravidelné roční vlny mají původ umělý, způsobený lidským faktorem. Nebyla nalezena žádná perioda odpovídající heliogefyzikálním jevům nebo související s polohou Měsíce.
Keywords:
natality; Slovakia; annual variations
Available at various institutes of the ASCR
Natural and artificial variations in the natality in Slovakia
Daily numbers of births in Slovakia 1996-2001 were taken into calculations. In the annual variation a trough occurs from October to December, and short sharp minima during holidays. In the spectrum ...
Analysis of the relation between geomagnetic activity and the phase of the North Atlantic Oscillation
Bochníček, Josef; Hejda, Pavel; Pýcha, Josef
2003 - Czech
The North Atlantic Oscillation is considered to be a very robust phenomenon. The analysis of tropospheric pressure and temperature deviations from their long-term averages realised on the data set of winter (January-March) periods 1963-2001, as well as wind deviations from their long-term averages pointed at close association between high geomagnetic activity and the positive NAO phase. Přestože severoatlantická oscilace (NAO) bývá považována za robustní meteorologický fenomén, analýza tlakových a teplotních troposférických polí v zimních obdobích (leden-březen) let 1963-2001, spolu s analýzou převládajících větrů vanoucích v troposféře v zimních obdobích let 1964, 1967-1969, 1971-2001 ukázala na neopominutelnou souvislost mezi úrovní geomagnetické aktivity a fází NAO.
Keywords:
geomagnetic activity; North Atlantic Oscillation; troposphere
Available at various institutes of the ASCR
Analysis of the relation between geomagnetic activity and the phase of the North Atlantic Oscillation
The North Atlantic Oscillation is considered to be a very robust phenomenon. The analysis of tropospheric pressure and temperature deviations from their long-term averages realised on the data set of ...
Variability of daily average air temperatures during the observation in Prague-Klementinum
Střeštík, Jaroslav
2002 - Czech
Two quantities have been defined to describe the variability of average daily air temperatures with respect to the long-term annual course within a selected interval: low values mean that daily values do not differ substantially from the long-term annual course whereas high values indicate a big variability. These values were calculated for each year and each season from 1775 till 2000. Jsou definovány dvě veličiny, které číselně popisují odchylky průměrných teplot vzduchu v jednotlivých dnech od dlouhodobého ročního chodu v průběhu určitého období: nízké hodnoty znamenají, že chod teploty v daném období je blízký dlouhodobému ročnímu chodu, vysoké hodnoty znamenají velké kolísání. Tyto hodnoty byly spočteny pro každý rok a každou sezonu od r. 1775 do r. 2000.
Keywords:
average air temperatures; variability; Prague-Klementinum
Available at various institutes of the ASCR
Variability of daily average air temperatures during the observation in Prague-Klementinum
Two quantities have been defined to describe the variability of average daily air temperatures with respect to the long-term annual course within a selected interval: low values mean that daily values ...
Lengths of grapewine sprouts, air temperatures and heliogeophysical factors from the point of view of chronobiology
Střeštík, Jaroslav; Mikulecký, M.
2002 - Czech
Series of sunspot numbers, indices of geomagnetic activity, mean air temperature in April and grapewine lengths measured to the 24th April were processed by power spectra and mutual coherences. Whereas spectra of sunspot numbers exhibit a pronounced peak at 11 yr, in spectra of other quantities more significant peaks occur. Řady Wolfových čísel slunečních skvrn, indexů geomagnetické aktivity, průměrných dubnových teplot vzduchu a délek letorostů vinné révy k 24. dubnu byly zpracovány metodou výpočtu powerspekter a vzájemných koherencí. Zatímco u Wolfových čísel dalece převládá perioda kolem 11 let, u dalších veličin je celá řada významných vrcholů ve spektru.
Keywords:
sunspot numbers; geomagnetic activity; grapewine lengths
Available at various institutes of the ASCR
Lengths of grapewine sprouts, air temperatures and heliogeophysical factors from the point of view of chronobiology
Series of sunspot numbers, indices of geomagnetic activity, mean air temperature in April and grapewine lengths measured to the 24th April were processed by power spectra and mutual coherences. ...
Solar and geomagnetic activity effects on wind fields in the Northern hemisphere winter lower troposhere
Bochníček, Josef; Hejda, Pavel
2002 - Czech
The magnitude and prevailing direction of winds in the lower troposphere were analysed in the Northern hemisphere in the winter periods of the years 1964, 1967-1969, 1971-2001. Composite maps of those winds showed marked differences, in particular between the maps in which both activities were simultaneously low or high. Byla vyšetřována souvislost mezi chováním sluneční a geomagnetické aktivity a chováním větrných polí dolní troposféry severní polokoule v průběhu zimních období let 1964, 1967-1969, 1971-2001. Souvislost byla analyzována prostřednictvím kompozitních map větrných polí. Ukázalo se, že tyto mapy, v nichž jsou obě aktivity současně nízké nebo vysoké, vykazují největší vzájemné rozdíly.
Keywords:
solar activity; geomagnetic activity; lower troposhere
Available at various institutes of the ASCR
Solar and geomagnetic activity effects on wind fields in the Northern hemisphere winter lower troposhere
The magnitude and prevailing direction of winds in the lower troposphere were analysed in the Northern hemisphere in the winter periods of the years 1964, 1967-1969, 1971-2001. Composite maps of those ...
Interactive demonstration of the effect of causal and acausal frequency filtering on seismic signals
Plešinger, Axel; Kolář, Petr
2002 - English
Causal and acausal filtering are procedures routinely used in the processing of seismic and other non-stationary signals but many users of respective software tools are not aware of the apparently subtle, for the exact interpretation of the filtered signals however significant differences between the two methods.
Keywords:
seismic signals; broadband seismograms; digital signal processing; waveform seismograms
Available at various institutes of the ASCR
Interactive demonstration of the effect of causal and acausal frequency filtering on seismic signals
Causal and acausal filtering are procedures routinely used in the processing of seismic and other non-stationary signals but many users of respective software tools are not aware of the apparently ...
Precipitation totals and average flows in the river Vltava during two centuries
Střeštík, Jaroslav
2002 - Czech
Precipitation series exhibit neither apparent periodicity nor systematic long-term change. Precipitation totals increase a little in summer and decrease in winter. A big noise level supplements these changes. Annual and seasonal average flows in rivers exhibit no periodicity but a weak long-term increase is observed. Většina prací pojednávajících o dlouhodobé klimatické změně se zaměřuje převážně na teplotu vzduchu, přesněji na dlouhodobou změnu průměrné denní teploty. Zde je opravdu dlouhodobá změna nápadná. Teploty zhruba od r. 1860 do dneška stále stoupají. Ale interpretace vzrůstu teplot za poslední století není jednoznačná, vzrůst lze interpretovat jako přirozené kolísání s periodou 200 let.
Keywords:
precipitation series; average flows; climatic change
Available at various institutes of the ASCR
Precipitation totals and average flows in the river Vltava during two centuries
Precipitation series exhibit neither apparent periodicity nor systematic long-term change. Precipitation totals increase a little in summer and decrease in winter. A big noise level supplements these ...
Magnetic susceptibility of peat-bogs as indicator of immissions in Czech and Polish parts of the Giant Mountains
Kapička, Aleš; Strzyszcz, Z.; Magiera, T.; Petrovský, Eduard
2001 - Czech
Recently, rapid and inexpensive (proxy) methods of outlining areas exposed to increased pollution by atmospheric particulates of industrial origin have been developed by scientists in various fields. One of them, soil magnetometry, seems to be a suitable tool, at least in some cases. This method is based on the knowledge that ferrimagnetic particles are deposited in top soil layers. Rychlé a relativně levné metody pro stanovení kontaminace půd pevným průmyslovým spadem jsou hledány v poslední době na řadě pracovišť. Jedna z nich - magnetometrie půd se jeví jako perspektivní. Je založena na faktu, že ferrimagnetické částice antropogenního původu jsou ukládány a akumulovány ve svrchních vrstvách půd a sedimentů.
Keywords:
magnetic susceptibility; peat bogs; immissions; Giant Mountains
Available at various institutes of the ASCR
Magnetic susceptibility of peat-bogs as indicator of immissions in Czech and Polish parts of the Giant Mountains
Recently, rapid and inexpensive (proxy) methods of outlining areas exposed to increased pollution by atmospheric particulates of industrial origin have been developed by scientists in various fields. ...
Solar-geomagnetic activity and weather changes. Observation results
Bochníček, Josef; Hejda, Pavel; Pýcha, Josef
2001 - Czech
The impact of solar and geomagnetic activity on pressure and temperature changes in the winter lower troposphere was investigated. It was found that although correlations between solar and geomagnetic activity in individual winter periods are weak, the pressure and temperature changes show similar magnitudes. Byl vyšetřován vliv sluneční a geomagnetické aktivity na změny tlaku a teploty zimní dolní troposféry, a to v průběhu let 1952-1999. Ukázalo se, že i když v jednotlivých zimních obdobích úroveň geomagnetické aktivity korelovala s úrovní sluneční aktivity velmi slabě, amplitudy tlakových a teplotních změn byly obdobné.
Keywords:
solar-geomagnetic activity; weather changes; observation results
Available at various institutes of the ASCR
Solar-geomagnetic activity and weather changes. Observation results
The impact of solar and geomagnetic activity on pressure and temperature changes in the winter lower troposphere was investigated. It was found that although correlations between solar and geomagnetic ...
NRGL provides central access to information on grey literature produced in the Czech Republic in the fields of science, research and education. You can find more information about grey literature and NRGL at service web
Send your suggestions and comments to nusl@techlib.cz
Provider
Other bases