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Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 249
Siegmund, Stefan , Stehlík, Petr
Time scale-induced asynchronous discrete dynamical systems

We study two coupled discrete-time equations with different (asynchronous) periodic time scales. The coupling is of the type sample and hold, i.e., the state of each equation is sampled at its update times and held until it is read as an input at the next update time...

Jiřík, Miroslav , DiCarlo, Antonio , Liška, Václav , Paoluzzi, Alberto
Algebraic filtering of surfaces from 3d medical images with julia

In this paper we introduce a novel algebraic filter, based on algebraic topology methods, to extract and smooth the boundary surface of any subset of voxels arising from the segmentation of a 3D medical image. The input of the Linear Algebraic Representation (lar) Surface extr...

Pražák, Aleš , Loose, Zdeněk , Psutka, Josef , Radová, Vlasta , Psutka, Josef
Live TV subtitling through respeaking with remote cutting-edge technology

This article presents an original system for live TV subtitling using respeaking and automatic speech recognition. Unlike several commercially available live subtitling solutions, the technology presented in this article comprises a speech recognition system specifically designed for live subtitling, ...

Stehlík, Petr , Vopravil, Václav
John Horton Conway (1937-2020)

Angloamerican mathematician John Horton Conway was a universal and charismatic figure. He significantly influenced number theory, group theory, game theory, node theory, dynamical systems and recreational mathemaics. He became famous because of his unique personality and uncoventional approach to prob...

Jedlička, Karel , Valeš, Jiří , Hájek, Pavel , Kepka, Michal , Pitoňák, Martin
Calculation of Agro-Climatic Factors from Global Climatic Data

This manuscript aims to create large-scale calculations of agro-climatic factors from global climatic data with high granularity-climatic ERA5-Land dataset from the Copernicus Climate Change Service in particular. First, we analyze existing approaches used for agro-climatic factor calculation and formulate...

Červená, Michaela , Zeman, Petr , Houška, Jiří , Šímová, Veronika , Procházka, Michal , Čerstvý, Radomír , Haviar, Stanislav , Vlček, Jaroslav
Enhancement of high-temperature oxidation resistance and thermal stability of hard and optically transparent Hf–B–Si–C–N films by Y or Ho addition

Hard and optically transparent amorphous Hf7B10Si32C2N44, Hf6B12Si29Y2C2N45 and Hf5B13Si25Ho3C2N48 films were prepared and examined for the oxidation resistance in air and thermal stability in inert gasses up to 1600 °C. A thermal evolution of their structure, hardness and optical properties was&...

Bek, Lukáš , Kottner, Radek , Laš, Vladislav
Material Model for Simulation of Progressive Damage of Composite Materials Using 3D Puck Failure Criterion

This paper deals with the suggestion and the implementation of a material model into the commercial software Abaqus. The material model is capable to simulate a progressive damage of composite materials. The progressive damage simulation is based on a stiffness matrix degradation and&#x...

Rohan, Eduard , Nquyen, Vu-Hieu , Naili, Salah
Homogenization approach and Floquet-Bloch theory for wave analysis in fluid-saturated porous media with mesoscopic heterogeneities

Weconsiderfluid-saturatedporoelasticmediawhosethemechanicalresponseisgovernedbytheBiotmodelrelevanttoamesoscopicscale.Assumingthematerialpropertiesbeingdescribedbyperiodicfunctions,toanalyzewavepropagationinsuchheterogeneousandanisotropicmedia,wederiveaformulationbasedontheFloquet-Bloch(FB)wavedecom-positionwhichenablestoanalyzewaveswithinthewholefirstBrillouinzoneassociatedwiththeperiodicstructure.ThewavedispersionresultsobtainedbytheFBapproacharecomparedwiththosecomputedusingamodelderivedby...

Ostašov, Pavel , null, null , Robertson, Henry , Piazza, Paolo , Datta, Avik , Apperley, Jane , Houdová, Lucie , Lysák, Daniel , Holubová, Monika , Tesařová, Kateřina , Caputo, Valentina S. , Barozzi, Iros
Evolution of Advanced Chronic Lymphoid Leukemia Unveiled by Single-Cell Transcriptomics: A Case Report

Genetic and transcriptional heterogeneity of Chronic lymphocytic leukaemia (CLL) limits prevention of disease progression. Longitudinal single-cell transcriptomics represents the state-of-the-art method to profile the disease heterogeneity at diagnosis and to inform about disease evolution. Here, we apply singl...

Dekojová, Tereza , Houdová, Lucie , Fatka, Jiří , Pitule, Pavel , Ostašov, Pavel , Caputo, Valentina S. , Gmucová, Hana , Lysák, Daniel , Jindra, Pavel , Holubová, Monika
Dynamic Changes of Inhibitory Killer-Immunoglobulin-Like Receptors on NK Cells after Allogeneic Hematopoietic Stem Cell Transplantation: An Initial Study

Killer-immunoglobulin-like receptors (KIRs) are critical natural killer (NK) cell regulators. The expression of KIRs is a dynamic process influenced by many factors. Their ligands—HLA(Human Leukocyte Antigen) class I molecules—are expressed on all nucleated cells that keep NK cells under control. ...

Salášek, Martin , Šlechtová, J. , Pavelka, Tomáš
Heparin-Induced Thrombocytopenia after Total Knee Replacement

Heparin-induced thrombocytopenia is a rare complication of treatment with both unfractionated heparin (UFH) and low molecular weight heparin (LMWH). Antibodies against the complex heparin-platelet factor 4 are the main cause of pathogenesis, resulting in the activation of thrombocytes, coagulation, en...

Martínek, Jiří , Lenc, Ladislav , Král, Pavel
Building an efficient OCR system for historical documents with little training data

As the number of digitized historical documents has increased rapidly it is necessary to provide efficient methods of information retrieval and knowledge extraction to make the data accessible. Such methods are dependent on optical character recognition (OCR) which converts the document imag...

Tenzer, Robert , Chen, Wenjin , Rathnayake, Samurdhika , Pitoňák, Martin
The effect of anomalous global lateral topographic density on the geoid-to-quasigeoid separation

The geoid can be computed from the quasigeoid by applying the geoid-to-quasigeoid separation. The geoid-to-quasigeoid separation is also needed for a vertical datum unification. Information about the actual topographic density distribution is required to determine accurately the geoid and orthometric&...

Jiřík, Miroslav , Gruber, Ivan , Moulisová, Vladimíra , Schindler, Claudia , Červenková, Lenka , Pálek, Richard , Rosendorf, Jáchym , Arlt, Janine , Bolek, Lukáš , Dejmek, Jiří , Dahmen, Uta , Železný, Miloš , Liška, Václav
Semantic Segmentation of Intralobular and Extralobular Tissue from Liver Scaffold H&E Images

Decellularized tissue is an important source for biological tissue engineering. Evaluation of the quality of decellularized tissue is performed using scanned images of hematoxylin-eosin stained (H&E) tissue sections and is usually dependent on the observer. The first step in creating a t...

Rezek, Jiří , Kozák, Tomáš , Kumar, Nirmal , Haviar, Stanislav
Synergy of experiment and model for reactive HiPIMS: effect of discharge parameters on WOx composition and deposition rate

Reactive high-power impulse magnetron sputtering of tungsten oxide films using metallic tungsten target (72 mm in diameter) in argon-oxygen atmosphere (total pressure of 0.75 Pa) was carried out. The effect of various discharge parameters on the deposition rate and film oxygen concentration&...

Goubej, Martin , Vyhlídal, Tomáš , Schlegel, Miloš
Frequency weighted H2 optimization of multi-mode input shaper

An optimization-based design of a robust multi-mode input shaper is presented with an embedded weighting of the frequency response. By prefixing the delay length in the shaper, the optimization design task is formulated as a standard quadratic programming problem. The shaper robustness ...

Bobkov, Vladimír , Tanaka, Mieko
Generalized Picone inequalities and their applications to (p,q)-Laplace equations

We obtain a generalization of the Picone inequality which, in combination with the classical Picone inequality, appears to be useful for problems with the (p,q)-Laplace type operators. With its help, as well as with the help of several other known generalized Picone inequalities, w...

Ježek, Petr , Teeters, Jeffery L. , Sommer, Friedrich T.
NWB Query Engines: Tools to Search Data Stored in Neurodata Without Borders Format

The Neurodata Without Borders (abbreviation NWB) format is a current technology for storing neurophysiology data along with the associated metadata. Data stored in the format is organized into separate HDF5 files, each file usually storing the data associated with a single recording ses...

Karabin, Marcin , Kitsakis, Dimitrios , Koeva, Mila , Navratil, Gerhard , Paasch, Jesper , Paulsson, Jenny , Vučić, Nikola , Janečka, Karel , Lisec, Anka
Layer approach to ownership in 3D cadastre in the case of underground tunnels

The paper focuses on approaches to the registration of real property rights in the case of underground or subway tunnels in different EU countries: Austria, Bulgaria, Czech Republic, Croatia, Greece, Poland, Slovenia, and Sweden. The authors conducted analysis on the registration of rig...

Holub, Přemysl , Lužar, Borut , Mihaliková, Erika , Mockovčiaková, Martina , Soták, Roman
Star Edge-Coloring of Square Grids

A star edge-coloring of a graph G is a proper edge-coloring without bichromatic paths and cycles of length four. The smallest integer k such that G admits a star edge-coloring with k colors is the star chromatic index of G. In the seminal paper on the topic, Dvo...

Collection's Items (Sorted by Submit Date in Descending order): 1 to 20 of 249