Dynamical stability of convection cells in the upper mantle     

Ludvík Urban  Reviewer J. Vaněk 《Studia Geophysica et Geodaetica》1988,32(2):151-158

Summary A two-dimensional flow model of an incompressible fluid with constant viscosity has been used to study the changes in the large-scale flow pattern (aspect ratio 4). Implications for convection in the Earth's mantle are discussed.

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a ¶rt; mn uuu ua u¶rt;mu nm m unm ¶rt; uu uu mu ama¶rt;a. ¶rt;am mam ¶rt; uu amuu u.

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On the gravitation absorption hypothesis     

Zdeněk Šimon  Jan Kostelecký  Antonín Zeman  Reviewer L. Skalský 《Studia Geophysica et Geodaetica》1988,32(1):16-23

Summary It is recommended that the data from measurements with supraconducting gravity meters be also analysed with regard to verifying the gravitation absorption hypothesis. Based on theoretical data from a3-year period, the spectrum of the assumed effect of shielding the gravitational influence of the Sun by the Earth's body on the value of the acceleration of gravity has been calculated for the tidal station Brussels (Figs 2a–e).

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¶rt;aam aauuam ¶rt;a uu n¶rt;uaumau ma mu u nuunm n¶rt;auaumauu. a mmuu ¶rt;a a mmu nu¶rt; u nm n¶rt;naa ma auauaumau ¶rt;mu a m a uu u u mmu ¶rt; nuu mauu (u. 2a–).

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КРИТИКА     

Milan Burša  Jiří Vaněk  Oldřich Novotný  Ladislav Křivský  Petronela Ochabová  Jan Bednář 《Studia Geophysica et Geodaetica》1988,32(4):416-420

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Moravian and Silesian nationalities: A new phenomenon in the ethnic map of the Czech Lands?     

P. Daněk 《GeoJournal》1993,30(3):249-254

In the 1991 population census, 1.4 million inhabitants of the Czech Republic applied for Moravian or Silesian nationality, which did not exist before.They expressed their consciousness of territorial appurtenance to the historical provinces of Moravia and Silesia and by this declaration they set it above the appurtenance to the Czech nation. New social cleavage thus developed in ethnically almost homogeneous environment of the Czech Republic, which constitutes a potential threat of the further splitting of the State. Trying to find the causes of such a phenomenon, the author deals with the territorial differentiation of these inhabitants and factors which influenced it. The close interconnection with political demands is stressed. The insensive centralizing measures of the communist regime are considered as the direct impulses of the present development. The phenomenon is understood as a specific manifestation of the posttotalitarian social crisis in Central and Eastern Europe.  相似文献   

Subsurface temperature field of the Bohemian Massif     

Jaroslav Kubík 《Studia Geophysica et Geodaetica》1990,34(2):110-128

Summary On the basis of temperature measurements in 190 boreholes we constructed a map of temperature distribution at a depth of 100 m below the terrain level and maps of temperature gradients in different depth intervals below the Earth's surface in the territory of the Bohemian Massif. Investigations were made into the effects of hydrogeological, geomorphological, structure geological and microclimatic factors on the subsurface temperature field in the Bohemian Massif together with an assessment of effects of these factors on heat flow determinations in shallow boreholes 100 – 200 m deep.

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Резюме Нa основaнuu uзмеренuя mемnерamуры в 190 сквaжuнaх былa nосmроенa кaрma рaсnре?rt;еленuя mемnерamуры нa ?rt;лубuне 100 м nо?rt; nоверхносmью Землu u кaрmы ?rt;рa?rt;uенma mемnерamуры в рaзных nо?rt;nоверхносmных uнmервaлaх нa mеррumорuu Чешско?rt;о мaссuвa. Иссле?rt;овaлось осложненuе mеnлово?rt;о nоля у nоверхносmu Землu целым ря?rt;ом фaкmоров: эффекmы рельефa nоверхносmu Землu, ?rt;вuженuя nо?rt;земных во?rt;, mеnлоnрово?rt;носmu ?rt;орных nоро?rt;, мuкроклuмamuческuе эффекmы u ?rt;р. u влuянuе эmuх фaкmоров нa uзмеренuе mеnлово?rt;о nоmокa в не?rt;лубокuх сквaжuнaх (100 – 200 м).

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The atmospheric mean energetic level and external forcing     

Dagmar Novotná  Vojtěch Vítek 《Studia Geophysica et Geodaetica》1991,35(1):33-38

Summary The atmospheric mean energetic level and corresponding flow pattern are studied theoretically in terms of the prescribed divergence of the horizontal wind vector. The divergence field may reflect the diabatic effect due to particles of extraterrestrial origin.  相似文献   

Quantitative analysis of travel-time curves of seismic events in the Ostrava-Karviná coal mining district     

Jiří Slavík  Pavel Kalenda  Karel Holub 《Studia Geophysica et Geodaetica》1991,35(3):234-243

Summary The paper is intended as a contribution to the quantitative analysis of travel-time curves of seismic events recorded in the Ostrava-Karviná District (OKD). The input data represent a set of 2621 seismic events, recorded by the local seismological network of 26 mine stations DSLA and a regional diagnostic polygon consisting of five surface Lennartz stations. All the events were processed automatically in the Operational Seismological Centre of the Czechoslovak Army Mine in Karviná and stored in the seismological data base. The results are presented in the form of graphs of arrival times versus distance for the whole OKD, for two mines and one tectonic block.Travel-time curves of direct P and S waves, as well as of reflected and refracted waves are given. The direct P and S waves propagate well practically throughout the whole region studied, but their apparent velocities of propagation are affected by the properties of the rock medium.As a result of the complicated geological conditions, the recorded wave image is quite complicated. Methods of mathematical modelling, using kinematic and dynamic parameters of seismic waves, will have to be applied to identify the separate wave groups uniquely.  相似文献   

Problems of the theoretical model applied to geosciences     

Radan Květ 《GeoJournal》1994,34(4):365-370

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Radioactive and trace element distribution in basaltic rocks of Lower Silesia     

Vladimír Kropáček  Věra Vaňková  Reviewer J. Fiala 《Studia Geophysica et Geodaetica》1985,29(3):290-299

Summary The distribution of radioactive(Th, U, K) and selected trace(Rb, Sr, Ba, Y, Zr, V, Cr, Ni) elements in volcanic rocks from the Opole and Jawor regions of the Lower Silesia has been studied. The behaviour of these elements in the studied rocks indicates that the Lower Silesian volcanic rocks are characterized by less differentiated type than other volcanic rocks of the Bohemian Massif, the Opole rock types probably having a less differentiated character than the Jawor rock types.

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¶rt;a an¶rt;u a¶rt;uamu(Th, U, K) u m ¶rt;u(Rb, Sr, Ba, Y, Zr, V, Cr, Ni) m auu n¶rt;a am n u u uuu. a n mam n¶rt;num, m aum u uuu n¶rt;mam ¶rt; aamuu n¶rt; u ¶rt;uuau, aum u ana¶rt; uu. au a n¶rt;num, m auu n¶rt; amu n ¶rt;uuau ma ua n¶rt; u amu .

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An analytical model of seismic travel times for a spherically asymmetric Earth     

Karel Pěč  Zdeněk Martinec  Reviewer J. Vaněk 《Studia Geophysica et Geodaetica》1985,29(3):220-227

Summary A general analytical model for travel times of seismic waves propagating in a radially asymmetric Earth, is suggested. It is represented by a series of irreducible spherical tensor products with bipolar spherical coefficients. The main term of the series describes the travel times in a radially symmetric Earth, the others represent corrections due to the spherical assymmetry. The method of least squares is suggested for determining the bipolar spherical coefficients from observed seismic travel times. Since the proposed theory assumes that the analytical representation is related to the reference earth, the corrections to the non-zero focal depth and non-zero sea-level height of the seismographic station must be introduced.

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aamuam a aaumua ¶rt; ¶rt;¶rt;aa uu a¶rt;ua ¶rt;¶rt; . mm¶rt;a aam u¶rt; ¶rt;a n¶rt;u m unu uuu uumau. ¶rt;a nuam¶rt;a a¶rt;ua ¶rt;¶rt; . ¶rt;u m aam nna a m a¶rt;ua ¶rt;¶rt;mu. ¶rt;aam un uu uum ¶rt; a¶rt;a¶rt;aa a¶rt;um m¶rt; auu a¶rt;am. ¶rt;aaa mu u¶rt;um u n¶rt;nu -unu¶rt;a u. nuam n ¶rt;u nna n¶rt;mau¶rt;aa, a uu aa u m nm a¶rt;u.

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