Robert Cimrman
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View article: Biomechanical Model of the Levator Ani Muscle: Identifying the Greatest Strain Areas in Its Subdivisions
Biomechanical Model of the Levator Ani Muscle: Identifying the Greatest Strain Areas in Its Subdivisions Open
Purpose Childbirth subjects the levator ani muscle (LAM) to significant mechanical stress, potentially causing damage and complications like pelvic organ prolapse or incontinence. This study aims to investigate potential defects in the LAM…
View article: Weak Imposition of Potential Dirichlet Boundary Conditions in Piezoelasticity: Numerical Study
Weak Imposition of Potential Dirichlet Boundary Conditions in Piezoelasticity: Numerical Study Open
Detailed modelling of piezoelastic structures often includes also an external circuit.This is tied with the need for a weak imposition of electric potential Dirichlet boundary conditions and questions of simulation accuracy arise.Several m…
View article: Dynamics of a cantilever beam with piezoelectric sensor: Experimental study
Dynamics of a cantilever beam with piezoelectric sensor: Experimental study Open
Online and real-time sensing and monitoring of the health state of complex structures, such as aircraft and critical parts of power stations, is an essential part of the research in dynamics.Several types of sensors are used for sensing dy…
View article: Dynamics of a cantilever beam with piezoelectric sensor: Finite element modeling
Dynamics of a cantilever beam with piezoelectric sensor: Finite element modeling Open
An elastodynamical model of a cantilever beam coupled with a piezoelectric sensor is introduced and its discretization using the finite element method is presented.The mathematical model includes additional terms that enforce the floating …
View article: Comparison of Six Different Methods for Measuring the Equine Hoof and Recording of its Three-Dimensional Conformation
Comparison of Six Different Methods for Measuring the Equine Hoof and Recording of its Three-Dimensional Conformation Open
Different measuring techniques have been used to objectify the classification of hoof shape. The MicroScribe is a novel tool that might prove useful for measuring hooves without prior reconstruction or compensation of projection artefacts.…
View article: Data accompanying the article "Comparison of six different methods for measuring the equine hoof and recording of its three-dimensional conformation"
Data accompanying the article "Comparison of six different methods for measuring the equine hoof and recording of its three-dimensional conformation" Open
Equine hoof measurements data, to be used with https://gitlab.com/hoofstats/hoofstats. See also https://zenodo.org/record/6962789. Files: measures.py - declarative description of hoof measures using point cloud data labels Pointcloud_hoof_…
View article: Data accompanying the article "Comparison of six different methods for measuring the equine hoof and recording of its three-dimensional conformation"
Data accompanying the article "Comparison of six different methods for measuring the equine hoof and recording of its three-dimensional conformation" Open
Equine hoof measurements data, to be used with https://gitlab.com/hoofstats/hoofstats. See also https://zenodo.org/record/6962789. Files: measures.py - declarative description of hoof measures using point cloud data labels Pointcloud_hoof_…
View article: Leveraging Python tensor contraction packages for evaluating finite element weak forms
Leveraging Python tensor contraction packages for evaluating finite element weak forms Open
A new implementation of finite element matrix evaluation functions in the finite element code SfePy is introduced, leveraging several Python tensor contraction packages that implement a general function for evaluating expressions given usi…
View article: Performance measurements of Python tensor contraction packages in the finite element context
Performance measurements of Python tensor contraction packages in the finite element context Open
Complete performance measurements data for the article "Assessment of Python Tensor Contraction Packages in the Context of Finite Element Evaluations" by Robert Cimrman. Files (load using pandas.read_hdf()): - layouts-laplace.h5 - memory l…
View article: Performance measurements of Python tensor contraction packages in the finite element context
Performance measurements of Python tensor contraction packages in the finite element context Open
Complete performance measurements data for the article "Assessment of Python Tensor Contraction Packages in the Context of Finite Element Evaluations" by Robert Cimrman. Files (load using pandas.read_hdf()): - layouts-laplace.h5 - memory l…
View article: Identification of the LLDPE Constitutive Material Model for Energy Absorption in Impact Applications
Identification of the LLDPE Constitutive Material Model for Energy Absorption in Impact Applications Open
Current industrial trends bring new challenges in energy absorbing systems. Polymer materials as the traditional packaging materials seem to be promising due to their low weight, structure, and production price. Based on the review, the li…
View article: Identification of LLDPE Constitutive Material Model for Energy Absorption in Impact Applications
Identification of LLDPE Constitutive Material Model for Energy Absorption in Impact Applications Open
Current industrial trends bring new challenges in energy absorbing systems. Polymer materials as the traditional packaging material seem to be promising due to their low weight, structure and production price. Based on the review, the line…
View article: INVERSE MASS MATRIX FOR HIGHER-ORDER FINITE ELEMENT METHOD IN LINEAR FREE-VIBRATION PROBLEMS
INVERSE MASS MATRIX FOR HIGHER-ORDER FINITE ELEMENT METHOD IN LINEAR FREE-VIBRATION PROBLEMS Open
In the paper, we present a direct inverse mass matrix in the higher-order finite element method for solid mechanics.The direct inverse mass matrix is sparse, has the same structure as the consistent mass matrix and preserves the total mass…
View article: A SOFTWARE FOR GENERATING AND OPTIMIZING PSEUDOPOTENTIALS
A SOFTWARE FOR GENERATING AND OPTIMIZING PSEUDOPOTENTIALS Open
We wish to compute potentials for molecular dynamics simulations around a crack tip in iron that would be as precise as possible. The potentials will be constructed with help of our ab-initio electronic calculations code, that relies on th…
View article: Optimization of pseudopotentials for electronic structure calculations
Optimization of pseudopotentials for electronic structure calculations Open
The electronic structure calculations represent a rigorous tool for predicting and understanding the properties of materials from first principles. Within the context of the density functional theory, a pseudopotential approach is often us…
View article: SfePy 2018.3 sources and heat conduction examples demonstrating declarative and imperative APIs of SfePy.
SfePy 2018.3 sources and heat conduction examples demonstrating declarative and imperative APIs of SfePy. Open
The full source code of the examples presented in the article "Multiscale finite element calculations in Python using SfePy" by Robert Cimrman, Vladimír Lukeš and Eduard Rohan. Files: heat_cond_declarative.py: a heat conduction problem usi…
View article: Mixing algorithms for fixed-point iterations in self-consistent electronic structure calculations
Mixing algorithms for fixed-point iterations in self-consistent electronic structure calculations Open
V článku je diskutována konvergence mixovacích algoritmů pro hledání pevného bodu v samo-konzistentních výpočtech elektronových struktur, a to jak standarních, tak navržených autory.
View article: Sensitivity analysis of total energy in electronic structure calculations
Sensitivity analysis of total energy in electronic structure calculations Open
This work was supported by the Czech Science Foundation, projects no. GA17-12925S and GA17-14840S. The first author acknowledges the support by CEDAMNF project, reg. no. CZ. 02.1.01/0.0/0.0/15 003/0000358, co-funded by the ERDF as part of …
View article: On approaches, methods and problems related to wave dispersion in porous media
On approaches, methods and problems related to wave dispersion in porous media Open
This research is supported by project GACR 17-01618S and in part by the project LO1506 of the Czech Ministry of Education, Youth and Sports.
View article: scipy-lectures/scipy-lecture-notes: Release 2017.1
scipy-lectures/scipy-lecture-notes: Release 2017.1 Open
Tutorial material on the scientific Python ecosystem
View article: SymPy: symbolic computing in Python
SymPy: symbolic computing in Python Open
SymPy is an open source computer algebra system written in pure Python. It is built with a focus on extensibility and ease of use, through both interactive and programmatic applications. These characteristics have led SymPy to become a pop…
View article: Homogenization of the fluid-saturated piezoelectric porous metamaterials
Homogenization of the fluid-saturated piezoelectric porous metamaterials Open
The paper is devoted to the homogenization approach in modelling of peri-
\nodic porous media constituted by piezoelectric porous skeleton with pores saturated by
\nviscous fluid. The representative volume element contains the piezoelectr…
View article: MODELLING OF EVANESCENT AND PROPAGATING MODES IN HOMOGENIZED PHONONIC STRUCTURES IN FREQUENCY AND TIME DOMAINS
MODELLING OF EVANESCENT AND PROPAGATING MODES IN HOMOGENIZED PHONONIC STRUCTURES IN FREQUENCY AND TIME DOMAINS Open
In the paper we deal with analytical and numerical methods for modelling phononic elastic structures subject to harmonic loading.The band gap prediction is based on the analysis of eigenvalues of the effective mass coefficients for a given…
View article: Two level homogenization of flows in deforming double porosity media: biot-darcy-brinkman model
Two level homogenization of flows in deforming double porosity media: biot-darcy-brinkman model Open
We present the two-level homogenization of the flow in a deformable double-porous structure described at two characteristic scales: the higher level porosity associated with the mesoscopic structure is constituted by channels in an elastic…