Earthquake source process and its complexity

Department of GeophysicsKatedra geofyzikyFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult

Attitudes of non-smokers towards smoking electronic cigarettes by their partners

Katedra psychologiePedagogická fakultaFaculty of Educatio

Earthquake source process and its complexity

Katedra geofyzikyDepartment of GeophysicsMatematicko-fyzikální fakultaFaculty of Mathematics and Physic

Frequency‐Dependent Moment Tensors of Induced Microearthquakes

Analysis of 984 induced microearthquakes from The Geysers geothermal reservoir in California reveals that the retrieved moment tensors depend on the frequency band of the inverted waveforms. The observed dependence is more significant for the percentages of the double‐couple, compensated linear vector dipole, and isotropic (ISO) components than for the focal mechanisms. The average root‐mean‐square of the moment tensors obtained in different frequency bands is correlated with spectra of ambient noise. The percentages of double‐couple and ISO components tend to decrease and increase with the upper cutoff frequency (fu), respectively. This suggests that shear rupture radiates energy preferentially in a lower frequency band and tensile rupture in a higher frequency band. Events displaying a strong increase of the ISO with fu are confined within the same depth interval as the injection points. This might be related to the strong thermoelastic effects in the vicinity of injection points that promote opening of small cracks adjacent to the main fractures

Centrality evolution of the charged-particle pseudorapidity density over a broad pseudorapidity range in Pb-Pb collisions at root s(NN)=2.76TeV

Peer reviewe

Ensuring Safety at Work in Paint Shops

Import 16/04/2013Bakalářská práce se zabývá zajištěním bezpečnosti a ochrany zdraví při práci v lakovnách. Vyhodnocením rizik pro konkrétní lakovnu, navržení vhodných osobních ochranných pracovních pomůcek, případně navržení bezpečnostních opatření k zamezení havárie ohrožení osob, zařízení, majetku.This thesis deals with ensuring the safety and health at work in paint shops. Risk assessment for a particular paint shop, the design of appropriate personal protective equipment, or design of security measures against accident, personal injury, facilities, property.Prezenční040 - Katedra bezpečnostního managementuvelmi dobř

Earthquake source process and its complexity

Katedra geofyzikyDepartment of GeophysicsFaculty of Mathematics and PhysicsMatematicko-fyzikální fakult

Racionalizace pracovních postupů při zajišťování vazeb mezi organizačním řádem a charakteristikami pracovních funkcí THP v podmínkách ŽDB

PrezenčníNeuvedenoNeuveden

Earthquake source models

The earthquake source is routinely modeled by moment tensor description. In many cases we need more information about the source process and for that reason we occupy with higher degree moments. This approach allows us to esti- mate non-point characteristics (including some dynamic parameters): geometry of the source, duration of the source process, average slip on the fault, spatial and temporal centroid and rupture velocity vector within the point source ap- proach. This description includes 20 parameters - 6 parameters for standard moment tensor (MT) and 14 parameters for second degree moments (SDM). First, we studied synthetic tests. Large amount of significant earthquakes con- tains false non-DC component which can be caused by approximation finite source by point source. This hypothesis was proved on the case of unilateral rupture. Standard MT contains more than 20 % non-DC components which was reduced to 6 %. In the second part we applied this procedure to real data. We chose large earthquakes (Mw>6) with large non-DC component. We estimated second degree moments for them and compared them with previous studies. Moreover we restitute higher degree moments from data and proved that false non-DC component were caused by source finiteness. In the last part we applied this method to mining data and..

Attitudes of non-smokers towards smoking electronic cigarettes by their partners

Katedra psychologiePedagogická fakultaFaculty of Educatio