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Article
Open AccessDoes VS30 reflect seismic amplification? Observations from the West Bohemia Seismic Network
The present study addresses verification of average seismic shear-wave velocity from the surface to a depth of 30 m (VS30) as a suitable proxy for a seismic amplification. For this purpose, we used instrumentally...
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Article
New Velocity Structure of the Nový Kostel Earthquake-Swarm Region, West Bohemia, Determined by the Isometric Inversion
The intraplate West Bohemia region is characterized by relatively frequent earthquake swarms mostly concentrated in the vicinity of the Nový Kostel village. Records of selected microearthquakes of the 2008 sei...
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Article
Open AccessAuxiliary function-based algorithm for blind extraction of a moving speaker
In this paper, we propose a novel algorithm for blind source extraction (BSE) of a moving acoustic source recorded by multiple microphones. The algorithm is based on independent vector extraction (IVE) where t...
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Article
Eigenoscillations and Stability of Rocking Stones: The Case Study of “The Hus Pulpit” in The Central Bohemian Pluton
Stability of precariously balanced rocks is employed in seismic hazard estimates. Standard toppling models of these rocks are based on a rigid body motion, i.e., this approximation assumes that their eigenfreq...
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Chapter and Conference Paper
Voice-Activity and Overlapped Speech Detection Using x-Vectors
The x-vectors are features extracted from speech signals using pretrained deep neural networks, such that they discriminate well among different speakers. Their main application lies in speaker identification ...
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Article
Site-specific probabilistic seismic hazard of Prague (Czech Republic)
Prague is the capital of the Czech Republic with 1.3 million inhabitants. It is situated in an intraplate region with low seismicity. The seismic hazard is low, but not negligible. In its evaluation, we face t...
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Chapter and Conference Paper
Robust Recognition of Conversational Telephone Speech via Multi-condition Training and Data Augmentation
In this paper, we focus on automatic recognition of telephone conversational speech in scenario, when no amount of genuine telephone recordings is available for training. The training set contains only data fr...
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Chapter and Conference Paper
Independent Vector Analysis Exploiting Pre-learned Banks of Relative Transfer Functions for Assumed Target’s Positions
On-line frequency-domain blind separation of audio sources performed through Independent Vector Analysis (IVA) suffers from the problem of determining the order of the separated outputs. In this work, we apply...
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Article
The Mechanism of Microearthquakes Related to a Gas Storage Using Differently Constrained Source Models: A Case Study of the Háje Location, Czech Republic
The resolution of a source mechanism is investigated in terms of three differently constrained source models: the moment tensor, the shear-tensile crack source model, and the double couple source model. The mo...
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Chapter
Thermal Properties and Thermal Analysis: Fundamentals, Experimental Techniques and Applications
The chapter provides a summary of the fundamental concepts that are needed to understand the heat capacity CP, thermal conductivity κ, and thermal expansion coefficient αL of materials. The CP, κ, and αL of vario...
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Chapter
Thermo-kinetic Phenomena Occurring in Glasses: Their Formalism and Mutual Relationships
In the present chapter, the macroscopic (recorded by methods of thermal analysis) manifestation of the structural relaxation and cold crystallization phenomena occurring in the glassy matrices will be discusse...
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Article
The effect of partial crystallinity on Se70Te30 crystallization kinetics
The effect of partial crystallinity on Se70Te30 crystallization kinetics was investigated in dependence on experimental conditions of the measurement (applied heating rate and particle size of the powdered materi...
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Article
Importance of proper baseline identification for the subsequent kinetic analysis of derivative kinetic data
Using theoretically simulated kinetic datasets, the performance of various types of commonly accessible baselines was tested when the heat capacity of reactants and products is not the same. The quality of the...
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Article
Wadati method as a simple tool to study seismically active fault zones: a case study from the West-Bohemia/Vogtland region, central Europe
The ratio of P- to S-wave velocities, VP/VS, is an important parameter characterizing rock composition and fluid saturation. We have studied properties of the ratio in the West-Bohemian seismically active region,...
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Article
Non-isothermal crystallization kinetics of GeTe4 infrared glass
Non-isothermal crystallization kinetics of the GeTe4 chalcogenide glass was studied in dependence on particle size. Complexity of the obtained DSC data was treated by means of the Fraser–Suzuki deconvolution, and...
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Article
Quantifying capability of a local seismic network in terms of locations and focal mechanism solutions of weak earthquakes
Extension of permanent seismic networks is usually governed by a number of technical, economic, logistic, and other factors. Planned upgrade of the network can be justified by theoretical assessment of the net...
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Article
The effect of Se ↔ Te substitution on crystallisation micro-mechanisms evincing in GeTe4 glass
Isothermal and non-isothermal crystallisation behaviour of the GeTe3.9Se0.1 chalcogenide glass was studied dependent on particle size and compared to the similar DSC study performed for the pure GeTe4 material. T...
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Article
Study of nucleation in a Se90Te10 chalcogenide glass by microscopy and differential scanning calorimetry
The Se90Te10 alloy readily forms a stable chalcogenide glass that has widely documented applications. In this work, the nucleation behavior of Se90Te10 was studied by infrared microscopy as well as by differentia...
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Article
Six-degree-of-freedom near-source seismic motions II: examples of real seismogram analysis and S-wave velocity retrieval
Near-source records obtained by the mechanical seismic sensor Rotaphone are presented. The Rotaphone can measure six components of seismic movements, three translational and three rotational. The apparent S-wa...
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Article
Six-degree-of-freedom near-source seismic motions I: rotation-to-translation relations and synthetic examples
The paper deals with theoretical aspects of rotation-to-translation relations in six-degree-of-freedom short-period seismic records at close hypocentral distances. Rotation-to-translation ratios are introduced...
