Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Josef Sikula"'
Autor:
Lukáš Homola, Jozef Klučka, Dominik Fabián, Petr Štourač, Josef Šikula, Eva Vávrová, Barbora Jeřábková, Martin Sihlovec, Václav Musil, Klára Španělová, Patricia Mužlayová, Pavlína Danhofer
Publikováno v:
Children, Vol 10, Iss 1, p 75 (2022)
Background: The proportion of intensive care unit (ICU) admissions in children that have and have not been directly caused by SARS-CoV-2 remains unclear. The aim of the study is to analyse a cohort of children admitted to the ICU with SARS-CoV-2 and
Externí odkaz:
https://doaj.org/article/59b365a632584948b27045e43b5ed20c
Publikováno v:
Ultramicroscopy. 204:49-54
Noise diagnostics was performed on a tungsten hairpin cathode that was used in conventional scanning electron microscope (SEM) which operates in a high vacuum. The focused beam was firstly measured and its power spectrum obtained in order to characte
Publikováno v:
IEEE Transactions on Power Electronics. 34:5779-5786
A simple ageing model is proposed for the fading of lithium–sulfur (Li–S) cell capacity with the number of cycles. The model could be applied for the ageing description of cells with an unknown internal structure in a wide range of engineering ap
Autor:
Petr Sedlak, Pavel Škarvada, Jiri Majzner, Ales Hamacek, Josef Sikula, Stanislav Nespurek, Petr Kubersky, Vlasta Sedlakova
Publikováno v:
Metrology and Measurement Systems, Vol 23, Iss 4, Pp 531-543 (2016)
Electrochemical amperometric gas sensors represent a well-established and versatile type of devices with unique features: good sensitivity and stability, short response/recovery times, and low power consumption. These sensors operate at room temperat
Autor:
Arkadiusz Szewczyk, Josef Sikula, Vlasta Sedlakova, Tomas Kuparowitz, Jiri Majzner, Petr Sedlak
Publikováno v:
Metrology and Measurement Systems, Vol 23, Iss 3, Pp 403-411 (2016)
Electronic Double-Layer Capacitors (EDLC), called Supercapacitors (SC), are electronic devices that are capable to store a relatively high amount of energy in a small volume comparing to other types of capacitors. They are composed of an activated ca
Autor:
Tomas Kuparowitz, Petr Sedlak, Jiri Majzner, Vlasta Sedlakova, Brandon Buergler, Josef Sikula, Petr Vasina
Publikováno v:
Metrology and Measurement Systems, Vol 23, Iss 3, Pp 345-358 (2016)
Degradation of Supercapacitors (SC) is quantified by accelerated ageing tests. Energy cycling tests and calendar life tests are used since they address the real operating modes. The periodic characterization is used to analyse evolution of the SC par
Autor:
Tomas Kuparowitz, Petr Vasina, Vlasta Sedlakova, Jiri Majzner, Brandon Buergler, Petr Sedlak, Josef Sikula
Publikováno v:
Journal of Power Sources. 286:58-65
A new method for the determination of parameters for an equivalent electrical circuit model of supercapacitors is proposed. The method is based on the evaluation of the time dependence of voltage measured on the supercapacitor terminals after its cha
Autor:
Vlasta Sedlakova, Tomas Kuparowitz, Tomáš Syrový, Lubomír Grmela, Josef Sikula, Petr Kuberský, Petr Sedlak, Jiri Majzner, S. Nešpůrek, Ales Hamacek
Publikováno v:
Chemical Physics. 456:111-117
Nitrogen dioxide represents threat to human health even at low concentrations. A new amperometric sensor with three-electrode topology (platinum/solid polymer electrolytes/carbon) was developed to overcome limitations of standard solid NO 2 sensors b
Autor:
Dinara Sobola, Miroslav Horáček, Alexandr Knápek, Josef Sikula, Tomas Kuparowitz, Frantisek Hruby
Publikováno v:
2017 30th International Vacuum Nanoelectronics Conference (IVNC).
The paper describes electrical noise of experimental field emission cathodes based on “polymer” pencil leads which have a high content of hybridized carbon with a low degree of surface oxidation and silicon monoxide (SiO). Charge transport within
Publikováno v:
2017 International Conference on Noise and Fluctuations (ICNF).
Low-frequency noise and I–V characteristics of reverse-biased thin-film chalcopyrite CIGS solar cell with a metal wrap through architecture were measured in order to evaluate the efficiency of edge deletion by a fine grinding and polishing. These e