A5065241918- Enhanced Oil Recovery Techniques
- Lattice Boltzmann Simulation Studies
- Groundwater flow and contamination studies
- Soil and Unsaturated Flow
- Heat and Mass Transfer in Porous Media
- Dam Engineering and Safety
- Advanced Mathematical Modeling in Engineering
- Fluid Dynamics and Turbulent Flows
- Astrophysics and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Dark Matter and Cosmic Phenomena
- Particle Dynamics in Fluid Flows
- Surface Roughness and Optical Measurements
- Industrial Vision Systems and Defect Detection
- Neutrino Physics Research
- Earthquake Detection and Analysis
- Optical measurement and interference techniques
- Iterative Methods for Nonlinear Equations
- Advanced Numerical Analysis Techniques
- Geophysical and Geoelectrical Methods
- Mobile Crowdsensing and Crowdsourcing
- Metaheuristic Optimization Algorithms Research
- Advanced Aircraft Design and Technologies
- CCD and CMOS Imaging Sensors
- Bioenergy crop production and management
Palacký University Olomouc
2018-2024
Czech Academy of Sciences, Institute of Physics
2022-2024
Czech Academy of Sciences
2024
Osaka Metropolitan University
2023
Modelling fluid flow in an unsaturated porous medium is a complex problem with many practical applications. There enough experimental and theoretical evidence that the standard continuum mechanics based modelling approach unable to capture important features of media flow. In this paper, two-dimensional semi-continuum model presented combines ideas from invasion percolation models. The divided into blocks finite size retain nature medium. Each block characterized by its porosity,...
Abstract. The gravity-driven flow in unsaturated porous medium is still one of the biggest unsolved problems multiphase flow. Sometimes a stable with an uniform wetting front observed, but at other times it unstable distinct preferential pathways even if material homogeneous. formation depends on many factors such as type medium, initial saturation or applied infiltration rate. As rate increases, first transitions from to for low rates, and then high rates. We propose governing equation its...
Abstract In order to correctly predict amino acid identities within natural proteins, protein language models (PLMs) must implicitly learn distributional constraints on sequences upheld over the course of evolution. As a consequence, sequence and mutation-level likelihoods such form effective zero-shot predictors mutations. Although various schemes have been proposed for exploiting knowledge captured by PLMs enhance supervised fitness prediction design, lack head-to-head comparison across...
Abstract A semi-continuum model for fluid flow in saturated-unsaturated porous medium one spatial dimension is presented. The based on well-established physics, measurable parameters and material characteristics. characterized by porosity, intrinsic permeability, main wetting draining branches of the retention curve, saturation dependence relative permeability. its density dynamic viscosity. only physics involved mass balance media together with Darcy-Buckingham Law unsaturated media. a...
Semi-continuum modelling of unsaturated porous media flow is based on representing the medium as a grid non-infinitesimal blocks that retain character medium. This approach similar to hybrid/multiscale modelling. model able physically correctly describe diffusion-like flow, finger-like and transition between them. article presents limit semi-continuum block size goes zero. In limiting process, retention curve each scales with in becomes hysteresis operator Prandtl-type used elasto-plasticity...
Offline Reinforcement Learning (RL) aims to turn large datasets into powerful decision-making engines without any online interactions with the environment. This great promise has motivated a amount of research that hopes replicate success RL experienced in simulation settings. work ambitions reflect upon these efforts from practitioner viewpoint. We start by discussing dataset properties we hypothesise can characterise type offline methods will be most successful. then verify claims through...
Abstract. In the gravity-driven free infiltration of a wetting liquid into homogeneous unsaturated porous medium, flow pattern is known to depend significantly on initial saturation. Point source an initially dry medium produces single finger with oversaturated tip and undersaturated tail. wet diffusion-like plume produced monotonic saturation profile. We present semi-continuum model, based proper scaling retention curve, which discrete in space continuous time. show that model able describe...
The origin and nature of ultrahigh-energy cosmic rays (UHECRs) are uppermost importance in astroparticle physics. Motivated by the need for an unprecedented aperture further advancements, Fluorescence detector Array Single-pixel Telescopes (FAST) is a prospective next-generation, ground-based UHECR observatory that aims to cover enormous area deploying large array low-cost fluorescence telescopes. full-scale FAST prototype consists four 20 cm photomultiplier tubes at focus segmented mirror...
Ultra-high energy cosmic rays (UHECRs), whose are beyond $10^{18}~\mathrm{eV}$, the most energetic particles we have ever detected. The latest results seem to indicate a heavier composition at highest energies, complicating search for their origins. Due limited number of UHECR events, need build an instrument with order magnitude larger effective-exposure collect UHECRs in future decades. Fluorescence detector Array Single-pixel Telescopes (FAST) is proposed low-cost, easily deployable...
The Fluorescence detector Array of Single-pixel Telescopes (FAST) is one several proposed designs for a next-generation cosmic-ray detector. Such detectors will require enormous collecting areas whilst also needing to remain cost-efficient. To meet these demands, the FAST collaboration has designed simplified, low-cost fluorescence telescope consisting only four photomultiplier tubes (PMTs). Since standard air shower reconstruction techniques cannot be used with so few PMTs, utilises an...
Abstract. The gravity-driven flow in an unsaturated porous medium remains one of the most important unsolved problems multiphase flow. Sometimes a diffusion-like with uniform wetting front, known as stable flow, is observed, but, at other times, unstable distinct preferential pathways. formation front depends on many factors, including type medium, initial saturation, and applied infiltration rate. As rate increases, first transitions from to low rates then high rates. We propose governing...
Light sources used in many applications usually need to be covered prevent mechanical damage and external harmful effects. Such a cover is ordinarily transparent object made from polymer or glass. During its manufacture, various decorative defects may occur on the surface and/or volume of object. These do not significantly affect function but visual aspect. Therefore, this paper presents an optical noncontact method detect amplitude polymeric glass objects that suitable for industrial...
This paper presents an optical noncontact method making the phase defects of transparent polymeric or glass objects visible, and image processing techniques detecting these defects. Phase affect light passing through them, not its amplitude. Therefore, presented is based on Fresnel diffraction a spatially coherent temporally incoherent light. The suitable for both non-planar planar objects. It verified with different tested are made from polycarbonate special surface coating showing orange...
Abstract. In gravity-driven free infiltration of a wetting liquid into homogeneous unsaturated porous medium, the flow pattern is known to depend significantly on initial saturation. Point-source an initially dry medium produces single finger with oversaturated tip and undersaturated tail. wet diffusion-like plume produced monotonic saturation profile. We present semi-continuum model based proper scaling retention curve which discrete in space continuous time. show that able describe this...