The importance of symbols in the region formation process     

Miroslav Šifta  Pavel Chromý 《Norsk geografisk tidsskrift. Norwegian journal of geography》2017,71(2):98-113

The aim in the article is to conceptualize the general foundations of research on the importance of regional symbolism in the process of region and regional identity formation. The article is founded on a critical analysis of works pertaining not only to the field of the new regional geography, but also to the field of regional marketing and/or branding, sociology, and semiology. The authors focus on meanings attributed to symbols and symbolism in literature, and observe which elements are viewed as regional symbols and how these symbols contribute to the process of regional development and institutionalization, especially in the formation of its symbolic shape. They examine the thematic and theoretical grounds, looking at identity, regional identity, and regional institutionalization. Next, regional symbols are defined and classified according to their types and forms, and their importance in the process of regional formation and institutionalization is discussed. The results show that symbols of any type can play an important role in a region’s marketing, and become the key image associated with a region. The authors conclude that regional symbols are a significant feature of the formation of a region and its identity, both outwardly (the external image of a region) and inwardly (concerning the inhabitants’ relationships with their region).  相似文献   

Prediction of magnitude of the largest potentially induced seismic event   总被引：1，自引：0，他引：1  

Miroslav Hallo  Ivo Oprsal  Leo Eisner  Mohammed Y. Ali 《Journal of Seismology》2014,18(3):421-431

We propose a method for determining the possible magnitude of a potentially largest induced seismic event derived from the Gutenberg–Richter law and an estimate of total released seismic moment. We emphasize that the presented relationship is valid for induced (not triggered) seismicity, as the total seismic moment of triggered seismicity is not bound by the injection. The ratio of the moment released by the largest event and weaker events is determined by the constants a and b of the Gutenberg–Richter law. We show that for a total released seismic moment, it is possible to estimate number of events greater than a given magnitude. We determine the formula for the moment magnitude of a probable largest seismic event with one occurrence within the recurrence interval (given by one volumetric change caused by mining or injecting). Finally, we compare theoretical and measured values of the moment magnitudes of the largest induced seismic events for selected geothermal and hydraulic fracturing projects.  相似文献   

Dust ejection from planetary bodies by temperature gradients: Laboratory experiments     

Thorben Kelling  Gerhard Wurm  Miroslav Kocifaj  Jozef Klačka  Dennis Reiss 《Icarus》2011,212(2):935-940

Laboratory experiments show that dusty bodies in a gaseous environment eject dust particles if they are illuminated. We find that even more intense dust eruptions occur when the light source is turned off. We attribute this to a compression of gas by thermal creep in response to the changing temperature gradients in the top dust layers. The effect is studied at a light flux of 13 kW/m² and 1 mbar ambient pressure. The effect is applicable to protoplanetary disks and Mars. In the inner part of protoplanetary disks, planetesimals can be eroded especially at the terminator of a rotating body. This leads to the production of dust which can then be transported towards the disk edge or the outer disk regions. The generated dust might constitute a significant fraction of the warm dust observed in extrasolar protoplanetary disks. We estimate erosion rates of about 1 kg s^?1 for 100 m parent bodies. The dust might also contribute to subsequent planetary growth in different locations or on existing protoplanets which are large enough not to be susceptible to particle loss by light induced ejection. Due to the ejections, planetesimals and smaller bodies will be accelerated or decelerated and drift outward or inward, respectively. The effect might also explain the entrainment of dust in dust devils on Mars, especially at high altitudes where gas drag alone might not be sufficient.  相似文献   

Thomsen's parameters from p‐wave measurements in a spherical sample‡     

Andrej Bóna  Dariush Nadri  Miroslav Brajanovski 《Geophysical Prospecting》2012,60(1):103-116

The aim of this paper is to understand the seismic anisotropy of the overburden shale in an oilfield in the North West Shelf of Western Australia. To this end, we first find the orientation of the symmetry axis of a spherical shale sample from measurements of ultrasonic P‐wave velocities in 132 directions at the reservoir pressure. After transforming the data to the symmetry axis coordinates, we find Thomsen's anisotropy parameters δ and ? using these measurements and measurements of the shear‐wave velocity along the symmetry axis from a well log. To find these anisotropy parameters, we use a very fast simulated re‐annealing algorithm with an objective function that contains only the measured ray velocities, their numerical derivatives and the unknown elasticity parameters. The results show strong elliptical anisotropy in the overburden shale. This approach produces smaller uncertainty of Thomsen parameter δ than more direct approaches.  相似文献   

Refraction Tomography of the Bohemian Massif Structures: A Critical Review and Reply to the Comments of Hrubcová et al. (2013)     

Miroslav Novotný 《Surveys in Geophysics》2013,34(4):531-540

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Density and magnetic models of the lithosphere along CELEBRATION 2000 profile CEL01     

Teresa Grabowska  Grzegorz Bojdys  Miroslav Bielik  Kristián Csicsay 《Acta Geophysica》2011,59(3):526-560

The paper presents 2D density and magnetic models of the crust and upper mantle along the DSS line profile of the CELEBRATION 2000 project that crosses the most important geological units in Central Europe. These are the Alps-Carpathians-Pannonian (ALCAPA) region, the SE part of the Paleozoic Platform (PLZ), the Trans-European Suture Zone (TESZ) and a fragment of the SW portion of the East European Craton (EEC). The density and magnetic models were constructed on the basis of a 2D model of P-wave velocity converted into density model, geological data as well as geothermal data and the results of integrated geophysical modelling for the lithosphere-asthenosphere boundary.  相似文献   

3D inversion of gravity data by separation of sources and the method of local corrections: Kolarovo gravity high case study     

Ilya Prutkin  Peter VajdaRobert Tenzer  Miroslav Bielik 《Journal of Applied Geophysics》2011,75(3):472-478

We present a novel methodology for 3D gravity/magnetic data inversion. It combines two algorithms for preliminary separation of sources and an original approach to 3D inverse problem solution. The first algorithm is designed to separate sources in depth and to remove the shallow ones. It is based on subsequent upward and downward data continuation. For separation in the lateral sense, we approximate the given observed data by the field of several 3D line segments. For potential field data inversion we apply a new method of local corrections. The method is efficient and does not require trial-and-error forward modeling. It allows retrieving unknown 3D geometry of anomalous objects in terms of restricted bodies of arbitrary shape and contact surfaces. For restricted objects, we apply new integral equations of gravity and magnetic inverse problems. All steps of our methodology are demonstrated on the Kolarovo gravity anomaly in the Danube Basin of Slovakia.  相似文献   

The fossil record (calcareous nannofossils and foraminifers) in single intervals of the Upper Cretaceous flysch sequence of the West Carpathians, Czechoslovakia     

Lilian vbenick  Miroslav Bubík 《Cretaceous Research》1992,13(5-6)

Studies of calcareous nannofossils and microfossils and their distribution in different intervals of the flysch rhythms in the Kloko ník brook in the Bílé Karpaty Unit of the Magura Group of nappes in the West Carpathians gave the following results. The highest species diversity of calcareous nannofossils was found in the lower parts of the Bouma Te hemipelagic intervals. The Campanian marker species Ceratolithoides aculeus and Aspidolithus parcus were found in practically all layers studied. A stratigraphically important foraminiferal fauna was obtained from the upper parts of the Bouma Te intervals, including the Campanian-Maastrichtian planktic foraminifers Globotruncana arca and Globotruncanita stuartiformis. In the non-calcareous pelagites, agglutinated species with a range from the Late Cretaceous to the Paleogene dominate.  相似文献   

New Towns and their environment     

Miroslav Strida 《GeoJournal》1991,2(1):35-38

The environment has, ins a regional sense, the function of usefulness and the function of housing both being very often contradictory. The prospects of New Towns reduce the occurrence of such conflicts and bring some possibilities for applied-geography-intervention. In the densely populated countries of Central Europe mining, manufacturing, administrative and regional utilization are the main decisive functions in the developing for the origin, localization and prosperity of New Towns.  相似文献   

Changes of parameters of magnetic anisotropy of foliated rocks under pressure     

Aleš Kapička  Miroslav Kobr  Richard Pichl 《Studia Geophysica et Geodaetica》1996,40(4):421-429

Summary The changes of magnetic anisotropy under pressure were studied on a set of rocks with marked macroscopic stratification, collected from the Rjvíz borehole. The anisotropy parameters are relatively very stable under directional pressure, acting parallel with the rocks' bedding, and, on the contrary, significantly unstable under pressure acting perpendicular to the bedding. Systematically different magnitudes of stress sensitivity coefficients, , for parallel directional susceptibility were observed in both cases in the same types of rocks. The main cause is probably the different capability of transferring external stress to ferrimagnetics via the stratified non-magnetic matrix. With regard to magnetomechanical phenomena, therefore, a singel value of the stress sensitivity coefficient is insufficient to characterize rocks with a markedly anisotropic matrix.  相似文献