Využití metod DPZ pro stanovení závadných látek v obálkách stavebních objektů
Polák, Mojmír; Doubrava, Pavel; Brzková, Lucie; Seidlová, Jana
2023 - Czech Keywords: hyperspektrální data; azbestové střechy; hyperspectral data; asbestos roofs; Linear Spectral Unmixing Available in a digital repository NRGL Využití metod DPZ pro stanovení závadných látek v obálkách stavebních objektů

Polák, Mojmír; Doubrava, Pavel; Brzková, Lucie; Seidlová, Jana
CENIA, 2023

TESTING THE METHOD OF MULTIPLE SCALES AND THE AVERAGING PRINCIPLE FOR MODEL PARAMETER ESTIMATION OF QUASIPERIODIC TWO TIME-SCALE MODELS
Papáček, Štěpán; Matonoha, Ctirad
2023 - English Some dynamical systems are characterized by more than one timescale, e.g. two well separated time-scales are typical for quasiperiodic systems. The aim of this paper is to show how singular perturbation methods based on the slow-fast decomposition can serve for an enhanced parameter estimation when the slowly changing features are rigorously treated. Although the ultimate goal is to reduce the standard error for the estimated parameters, here we test two methods for numerical approximations of the solution of associated forward problem: (i) the multiple time-scales method, and (ii) the method of averaging. On a case study, being an under-damped harmonic oscillator containing two state variables and two parameters, the method of averaging gives well (theoretically predicted) results, while the use of multiple time-scales method is not suitable for our purposes. Keywords: Dynamical system; Singular perturbation; Averaging; Parameter estimation; Slow-fast decomposition; Damped oscillations Fulltext is available at external website. TESTING THE METHOD OF MULTIPLE SCALES AND THE AVERAGING PRINCIPLE FOR MODEL PARAMETER ESTIMATION OF QUASIPERIODIC TWO TIME-SCALE MODELS

Some dynamical systems are characterized by more than one timescale, e.g. two well separated time-scales are typical for quasiperiodic systems. The aim of this paper is to show how singular ...

Papáček, Štěpán; Matonoha, Ctirad
Ústav teorie informace a automatizace, 2023

Pohybové hry ako prostriedok na prekonanie strachu pri vyučovaní zjazdového lyžovania
2023 - Keywords: sjezdové lyžování; žáci; strach; pohybové hry; intersexuální rozdíly Available in the ZČU Library. Pohybové hry ako prostriedok na prekonanie strachu pri vyučovaní zjazdového lyžovania

Západočeská univerzita v Plzni, 2023

Analýza rohových kopov na majstrovstvách sveta vo futbale 2022
2023 - Keywords: rohový kop; fotbal; analýza zápasu; úspěsnost Available in the ZČU Library. Analýza rohových kopov na majstrovstvách sveta vo futbale 2022

Západočeská univerzita v Plzni, 2023

Úvod do problematiky replikační krize ve vědě: a jak je na tom kinantropologie?
2023 - Keywords: p hodnoty; pochybné vědecké praktiky; testování hypotéz Available in the ZČU Library. Úvod do problematiky replikační krize ve vědě: a jak je na tom kinantropologie?

Západočeská univerzita v Plzni, 2023

Analýza kvality spánku a cirkadiánních determinant výkonnosti superligových a extraligových hráčů (floorbal, fotbal, lední hokej)
2023 - Keywords: cirkadiánní rytmy; hráčský výkon; chronobiologie; světlo; spánek Available in the ZČU Library. Analýza kvality spánku a cirkadiánních determinant výkonnosti superligových a extraligových hráčů (floorbal, fotbal, lední hokej)

Západočeská univerzita v Plzni, 2023

Different Boundary Conditions For LES Solver PALM 6.0 Used for ABL in Tunnel Experiment
Řezníček, Hynek; Geletič, Jan; Bureš, Martin; Krč, Pavel; Resler, Jaroslav; Vrbová, Kateřina; Trush, Arsenii; Michálek, Petr; Beneš, L.; Sühring, M.
2023 - English We tried to reproduce results measured in the wind tunnel experiment with a CFD simulation provided by numerical model PALM. A realistic buildings layout from the Prague-Dejvice quarter has been chosen as a testing domain because solid validation campaign for PALM simulation of Atmospheric Boundary Layer (ABL) over this quarter was documented in the past. The question of input data needed for such simulation and capability of the model to capture correctly the inlet profile and its turbulence structure provided by the wind-tunnel is discussed in the study The PALM dynamical core contains a solver for the Navier-Stokes equations. By default, the model uses the Large Eddy Simulation (LES) approach in which the bulk of the turbulent motions is explicitly resolved. It is well validated tool for simulations of the complex air-flow within the real urban canopy and also within its reduced scale provided by wind tunnel experiments. However the computed flow field between the testing buildings did not correspond well to the measured wind velocity in some points. Different setting of the inlet boundary condition was tested but none of them gave completely developed turbulent flow generated by vortex generators and castellated barrier wall place at the entrance of the aerodynamic section of the wind tunnel.\n Keywords: large eddy simulation; wind tunnel; atmospheric boundary layer; PALM model; turbulence Fulltext is available at external website. Different Boundary Conditions For LES Solver PALM 6.0 Used for ABL in Tunnel Experiment

We tried to reproduce results measured in the wind tunnel experiment with a CFD simulation provided by numerical model PALM. A realistic buildings layout from the Prague-Dejvice quarter has been ...

Řezníček, Hynek; Geletič, Jan; Bureš, Martin; Krč, Pavel; Resler, Jaroslav; Vrbová, Kateřina; Trush, Arsenii; Michálek, Petr; Beneš, L.; Sühring, M.
Ústav informatiky, 2023

A polarizable reference electrode
Mareček, Vladimír
2023 - English New concept of a reference electrode for electrochemical systems resolves a problem of a poor \npotential stability of refence electrodes based on the distribution of a strongly \nhydrophobic common cation between two immiscible electrolyte solutions (TTTES). The use of a \npolarizable metal electrode instead of a classical reference electrode is demonstrated in \n a modified conventional four-electrode cell with TTTES. A simple battery operated potentiostat \ncontrols the working electrode potential in a three-electrode configuration. The working metal \nelectrode then serves as a polarizable reference organic solvent electrode in a four-electrode \nsystem for the polarization of the water/organic solvent interface.\n\n Keywords: reference electrode; liquid/liquid interface; chloride extraction Available on request at various institutes of the ASCR A polarizable reference electrode

New concept of a reference electrode for electrochemical systems resolves a problem of a poor \npotential stability of refence electrodes based on the distribution of a strongly ...

Mareček, Vladimír
Ústav fyzikální chemie J. Heyrovského, 2023

Elektrochemické studium pH závislých redoxních vlastností komplexů mědi s aza-makrocyklickými ligandy
Koláčná, Lucie; Maďar, M.; Kubíček, V.; Ludvík, Jiří
2023 - Czech Molekulární elektronika je progresivní směr moderní materiálové chemie. Zabývá se vývojem\nelektronických prvků na úrovni jedné molekuly. Nejdůmyslnější molekulární elektroniku\nnajdeme v přírodě v podobě metaloenzymů. Jedním ze směrů výzkumu jejich modelů jsou\nkomplexy různě substituovaných azamakrocyklů. Předností těchto molekul je jejich stabilita a\ndobře definovaná syntéza. Investigated Cu(II) complexes are based on plain or cross-bridged cyclam. The\nelectrochemically inactive cyclam was modified by carboxylate, phosphonate, or phenolate\npendant arms. Cu(II) represents the main redox center of the complexes. Modification of the\nligand causes a changed pattern of complex redox response in buffered aqueous solution.\nIrreversible Cu(II) reduction results in complex decomposition to amalgamated copper and\nligand in excess. After Cu(0) electrochemical in situ re-oxidation, copper and ligand are recomplexed.\nComplexes undergo isomerization, accelerated by increasing the temperature. The\ninfluence of pH on complex isomerization and the reversibility of its reduction was described. Keywords: cyclam; Cu(II) complexes; pendant arms Available on request at various institutes of the ASCR Elektrochemické studium pH závislých redoxních vlastností komplexů mědi s aza-makrocyklickými ligandy

Molekulární elektronika je progresivní směr moderní materiálové chemie. Zabývá se vývojem\nelektronických prvků na úrovni jedné molekuly. Nejdůmyslnější molekulární elektroniku\nnajdeme v přírodě v ...

Koláčná, Lucie; Maďar, M.; Kubíček, V.; Ludvík, Jiří
Ústav fyzikální chemie J. Heyrovského, 2023

Determination of Selected Natural Psychoactive Substances in Organic Matrices at 3D Printed Electrodes
Choińska-Mlynarczyk, Marta; Šestáková, Ivana; Navrátil, Tomáš
2023 - English Psilocybin and its derivative psilocin are popular psychoactive substances both as experimental\ntreatments in clinical trials and as illicit drugs. Their potential ability to influence the human\nbrain entails the need for a fast, inexpensive, selective, and sensitive method of their\ndetermination. The aim of our study was the development of new 3D-printed electrodes which\nfulfill these demands and are useful for medical, toxicological, and forensic purposes.\nSuccessful development allows determining in real matrices (human plasma and dried\nmushrooms) concentrations of the order of 1 μmol dm-3.\n Keywords: natural psychoactive substances; 3D-printed electrodes; psilocin; psilocybin Available on request at various institutes of the ASCR Determination of Selected Natural Psychoactive Substances in Organic Matrices at 3D Printed Electrodes

Psilocybin and its derivative psilocin are popular psychoactive substances both as experimental\ntreatments in clinical trials and as illicit drugs. Their potential ability to influence the ...

Choińska-Mlynarczyk, Marta; Šestáková, Ivana; Navrátil, Tomáš
Ústav fyzikální chemie J. Heyrovského, 2023