Internet addiction in relation to depression among students
2024 - Klíčová slova: závislost na internetu; deprese; studenti Plné texty jsou dostupné v knihovně ZČU. Internet addiction in relation to depression among students

Západočeská univerzita v Plzni, 2024

Reaction Mechanisms of Psychoactive Compounds
Sokolová, Romana; Beneš, Marek; Jiroušková, Eliška; Degano, I.
2024 - anglický The reaction mechanism of selected new psychoactive substances (NPS) 4-methylpentedrone and 2-(((4-ethyl-2,5-dimethoxyphenethyl)amino)methyl)phenol was investigated based on their\nelectrochemical and spectroelectrochemical properties. Both drugs were examined by means of cyclic voltammetry using diagnostic parameters for particular reaction schemes, UV/Vis, and IR\nspectroelectrochemistry. Since water participates in the redox mechanism of both studied compounds, the reaction mechanism was studied under a controlled amount of water in an\nacetonitrile environment. Klíčová slova: oxidation; reduction; IR spectrochemistry Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd. Reaction Mechanisms of Psychoactive Compounds

The reaction mechanism of selected new psychoactive substances (NPS) 4-methylpentedrone and 2-(((4-ethyl-2,5-dimethoxyphenethyl)amino)methyl)phenol was investigated based on their\nelectrochemical and ...

Sokolová, Romana; Beneš, Marek; Jiroušková, Eliška; Degano, I.
Ústav fyzikální chemie J. Heyrovského, 2024

Spectroelectrochemical Devices for Monitoring of Intermediates and Products on Carbonbased Composite Electrodes
Vaněčková, Eva; Šikula, M.; Hrdlička, Vojtěch; Sebechlebská, Táňa; Kolivoška, Viliam
2024 - anglický Spectroelectrochemistry (SEC), as an interdisciplinary field, provides us with more comprehensive information about electroactive molecules involved in charge transfer reactions. Commercially\navailable SEC cells most often have an incorporated platinum working electrode, which can limit the range of the usable potential window and, in addition, can complicate the analysis due to the\nabsorption phenomenon. In this work, we designed and manufactured two types of custom-made SEC cells employing optically transparent carbon-based working electrodes for UV-Vis monitoring of reactants and electrogenerated intermediates and products. The first SEC cell is entirely manufactured by 3D printing using fused deposition modeling (FDM) by combining optically transparent (PET) and electrically conductive (PLA-CB) filaments. The second SEC cell employs pencil graphite (PG) rods as the working electrode (PGE) and its body is manually assembled from quartz slides. The functionality of the FDM 3D printed SEC cell and manually assembled quartz SEC cell were verified by cyclic voltammetry with in situ UV-Vis spectroscopic absorption monitoring of ruthenium(III) acetylacetonate (Ru(ac)3) redox-active probe dissolved in an aqueous or non-aqueous deaerated solvent, respectively. Both presented cells enable complete redox reversible conversion and strictly oxygen-free conditions. Klíčová slova: pencil graphite electrode; spectroelectrochemistry; 3D printed electrode Plné texty jsou dostupné na vyžádání prostřednictvím repozitáře Akademie věd. Spectroelectrochemical Devices for Monitoring of Intermediates and Products on Carbonbased Composite Electrodes

Spectroelectrochemistry (SEC), as an interdisciplinary field, provides us with more comprehensive information about electroactive molecules involved in charge transfer reactions. ...

Vaněčková, Eva; Šikula, M.; Hrdlička, Vojtěch; Sebechlebská, Táňa; Kolivoška, Viliam
Ústav fyzikální chemie J. Heyrovského, 2024

Creative sewing as teacher support in early childhood and pre-school educatio - enchanted windows
2024 - Klíčová slova: kostka; šátek; houba Plné texty jsou dostupné v knihovně ZČU. Creative sewing as teacher support in early childhood and pre-school educatio - enchanted windows

Západočeská univerzita v Plzni, 2024

Topics for work activities connecting man and the world of work with digital technologies and their verification in practice with children in the 1st grade of elementary school
2024 - Klíčová slova: Člověk a svět práce; digitální technologie; pracovní činnosti Plné texty jsou dostupné v knihovně ZČU. Topics for work activities connecting man and the world of work with digital technologies and their verification in practice with children in the 1st grade of elementary school

Západočeská univerzita v Plzni, 2024

Nauczajmy, a little about the project from students for students
2024 - Klíčová slova: projekt "UČ!"; formativní hodnocení; aktivační metody; výukové hry; pozitivní disciplína Plné texty jsou dostupné v knihovně ZČU. Nauczajmy, a little about the project from students for students

Západočeská univerzita v Plzni, 2024

Numerical evaluation of mass-diffusive compressible fluids flows models
Bodnár, Tomáš; Fraunié, P.
2024 - anglický This contribution presents first numerical tests of some recently published alternative models for solution of viscous compressible and nearly incompressible models. All models are solved by high resolution compact finite difference scheme with strong stability preserving RungeKutta time stepping. The two simple but challenging computational test cases are presented, based on the double-periodic shear layer and the Kelvin-Helmholtz instability. The obtained time-dependent flow fields are showing pronounced shear and vorticity layers being resolved by the standard as well as by the new mass-diffusive modified models. The preliminary results show that the new models are viable alternative to the well established classical models. Klíčová slova: compressible Navier-Stokes; nearly incompressible flow; mass diffusion; compact finite-difference Plné texty jsou dostupné v digitálním repozitáři Akademie Věd. Numerical evaluation of mass-diffusive compressible fluids flows models

This contribution presents first numerical tests of some recently published alternative models for solution of viscous compressible and nearly incompressible models. All models are solved by high ...

Bodnár, Tomáš; Fraunié, P.
Matematický ústav, 2024

Motion of fluids in the moving domain
Nečasová, Šárka
2024 - anglický It is a survay paper where the problem of the existence of weak solutions of compressible barotropic solutions in a moving bounded domain is studied. Klíčová slova: compressible fluid; moving domain; weak solutions Plné texty jsou dostupné v digitálním repozitáři Akademie Věd. Motion of fluids in the moving domain

It is a survay paper where the problem of the existence of weak solutions of compressible barotropic solutions in a moving bounded domain is studied.

Nečasová, Šárka
Matematický ústav, 2024

Chladící efekt stromů ve městě: principy, funkce a příklady měření
2024 - Přednáška představila výzkumné zaměření Doc. Pokorného, jeho kolegů z ENKI, o.p.s. a z Pedagogické fakulty JČU v Českých Budějovi cích. Výklad se zaměřil na tok energie v krajině, vliv evapotranspirace a na jev zvaný biotická pumpa. Problematika byla nahlédnuta i z hle diska didaktiky - jako průřezové téma vedoucí k poznání komplexních environmentálních souvislostí. V diskuzi byly představeny vzdělávací materiály, které kolektiv autorů připravil pro potřeby učitelů ZŠ a SŠ: metodiky a pracovní listy dostupné v [1]. Klíčová slova: krajina; biotická pumpa; evapotranspirace Plné texty jsou dostupné v knihovně ZČU. Chladící efekt stromů ve městě: principy, funkce a příklady měření

Přednáška představila výzkumné zaměření Doc. Pokorného, jeho kolegů z ENKI, o.p.s. a z Pedagogické fakulty JČU v Českých Budějovi cích. Výklad se zaměřil na tok energie v krajině, vliv ...

Západočeská univerzita v Plzni, 2024

Modification of cooling system for laboratory measurement of rotor blade vibration
Maturkanič, Dušan; Procházka, Pavel; Hodboď, Robert; Voronova, Evgeniya; Mekhalfia, Mohammed Lamine
2024 - anglický Last year, the replacement of the turbine wheel model was completed in the Laboratory of Rotational Laser Vibrometry of the Institute of Thermomechanics AS CR, v.v.i. Based on previous experience and the expected higher operating load planned for the new wheel, the cooling system was modified at the same time. The paper describes the main effort in this direction and the results that clarify the previous damage of the measuring device. Klíčová slova: blade; vibration; cooling system; measurement; laboratory Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Modification of cooling system for laboratory measurement of rotor blade vibration

Last year, the replacement of the turbine wheel model was completed in the Laboratory of Rotational Laser Vibrometry of the Institute of Thermomechanics AS CR, v.v.i. Based on previous experience and ...

Maturkanič, Dušan; Procházka, Pavel; Hodboď, Robert; Voronova, Evgeniya; Mekhalfia, Mohammed Lamine
Ústav termomechaniky, 2024