Autor: Skrzypczak, Ewa - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Contribution to analysis of the turbulence periodicity at the Arctowski Station
Autorzy:: Skrzypczak, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/2057278.pdf
Data publikacji:: 1985
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Antarctic
wind
spectral structure
Źródło:: Polish Polar Research; 1985, 6, 4; 449-457
0138-0338
2081-8262
Pojawia się w:: Polish Polar Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: On Mathematical Modelling in Biology and Medicine
Autorzy:: Skrzypczak, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/748595.pdf
Data publikacji:: 1985
Wydawca:: Polskie Towarzystwo Matematyczne
Tematy:: General biology
Theory of mathematical modeling
Opis:: .
A comparison of input ideas and data as well as goals of mathematical models used in physics and biology is briefly discussed. The models used in biology and medicine are divided into „static" and „dynamical" ones and typical schemes of their construction and analysis are given. The main part of the paper concerns dynamical models describing the time evolution of modelled systems in the form of differential eąuations, Some examples are treated in a more detailed way with a stress on their analysis by means of the qualitative theory of differential eąuations. The quantitative (in particular, numerical) and the qualitative approaches to the model analysis in biology are discussed and compared. Arguments in favour of the qualitative approach in many biological problems are given.
Źródło:: Mathematica Applicanda; 1985, 13, 26
1730-2668
2299-4009
Pojawia się w:: Mathematica Applicanda
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Investigation of the influence of liquid phase motion on the solidification process in the three-dimensional region
Autorzy:: Węgrzyn-Skrzypczak, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/1839853.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: Finite Element Method
numerical modelling
solidification
fluid flow
convection
Metoda Elementów Skończonych
modelowanie numeryczne
zestalenie
przepływ cieczy
konwekcja
Opis:: In this paper, the numerical model of solidification process with the motion of the liquid phase is presented. The mathematical description of the considered problem is based on the heat conduction equation with convective term and the Navier-Stokes equations with continuity equation. The numerical model uses the Finite Element Method (FEM). The simulations of the solidification process with or without the fluid motion effect are presented and discussed.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2021, 20, 1; 103-111
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Discontinuous Galerkin method for the three-dimensional problem of thermoelasticity
Autorzy:: Węgrzyn-Skrzypczak, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/122786.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: thermoelasticity
finite element method
discontinuous Galerkin method
termoelastyczność
metoda elementów skończonych
nieciągła metoda Galerkina
Opis:: The paper is focused on the mathematical and numerical approaches for the thermoelasticity problem in the three-dimensional domain. The mathematical description of considered problem is based on the second order differential equations of elasticity with the term describing thermal deformations. The numerical model uses the discontinuous Galerkin method which is widely used to solve the problems of hydrodynamics. The presented paper shows the possibility of using the mentioned method to solve the problem of thermomechanics.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 4; 115-126
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Analysis of the three-dimensional thermoelasticity problem with the use of the continuous Galerkin method
Autorzy:: Węgrzyn-Skrzypczak, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/1839763.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: thermoelasticity
Finite Element Method
continuous Galerkin method
termosprężystość
metoda elementów skończonych
metoda Galerkina ciągła
Opis:: The paper focuses on the mathematical and numerical modelling of the thermoelasticity problem in the three-dimensional region. The governing equations of the mathematical model are a set of equilibrium equations. The numerical model uses continuous Galerkin formulation together with the Finite Element Method (FEM). Both models are discussed in detail. The final set of FEM equations is derived. The example of numerical calculations obtained with the use of an original computer program is presented. The main goal of presented paper is to develop the alternative model to the one based on the Discontinuous Galerkin Method (DGM).
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2020, 19, 3; 111-121
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: The comparison of results obtained from the continuous and discontinuous Galerkin Method for the thermoelasticity problem
Autorzy:: Węgrzyn-Skrzypczak, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/2141510.pdf
Data publikacji:: 2021
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: thermoelasticity
finite element method
discontinuous Galerkin method
termosprężystość
metoda elementów skończonych
nieciągła metoda Galerkina
Opis:: The presented paper is focused on the comparison of the Continuous and Discontinuous Galerkin Methods in terms of thermoelasticity for a cubic element. For this purpose, a numerical model of the phenomenon was built using both methods together with the Finite Element Method (FEM). The comparison of the results of numerical simulation obtained with the use of an original computer program based on the derived final set of FEM equations for both methods is presented.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2021, 20, 3; 77-88
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Mean air temperatures at definite wind directions in Hornsund, Spitsbergen
Autorzy:: Wielbińska, Danuta
Skrzypczak, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/2053230.pdf
Data publikacji:: 1988
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Arctic
Spitsbergen
wind direction
air temperature
Źródło:: Polish Polar Research; 1988, 9, 1; 105-119
0138-0338
2081-8262
Pojawia się w:: Polish Polar Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Mean air temperatures at definite wind directions at Arctowski Station, King George Island, West Antarctica
Autorzy:: Wielbińska, Danuta
Skrzypczak, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/2053229.pdf
Data publikacji:: 1988
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Antarctica
South Shetland Islands
wind direction
air temperature
Źródło:: Polish Polar Research; 1988, 9, 1; 133-145
0138-0338
2081-8262
Pojawia się w:: Polish Polar Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Analytical validation of the Finite Element Method model for Laplace equation
Autorzy:: Węgrzyn-Skrzypczak, Ewa
Skrzypczak, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/122738.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: Laplace equation
Fourier’s method
Finite Element Method
równanie Laplace'a
metoda Fouriera
metoda elementów skończonych
Opis:: The presented paper is focused on the comparison of the numerical solution of the Laplace equation in a two-dimensional space with the results obtained with the use of the analytical method. The results of the numerical model are computed on the base of the Finite Element Method. The analytical solution of the considered equation is obtained using the Fourier series. Finally the results of both methods are compared in order to verify the accuracy of numerical implementation.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2019, 18, 3; 97-106
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Numerical modeling of the solidification process with consideration of shrinkage cavities formation and the influence of solid phase content on the feeding of the casting
Autorzy:: Węgrzyn-Skrzypczak, Ewa
Skrzypczak, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/24201503.pdf
Data publikacji:: 2023
Wydawca:: Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
Tematy:: solidification process
finite element method
shrinkage cavity
computational mechanics
proces krzepnięcia
metoda elementów skończonych
jama skurczowa
mechanika komputerowa
Opis:: The paper focuses on the numerical modeling of the three-dimensional solidification process of steel using the finite element method (FEM). The model includes and discusses the formation of shrinkage cavities and the influence of the solid phase content on the feeding of the casting through the riser. The analysis assumed a critical value of the solid phase content, at which the transport of liquid phase from the riser to the casting is interrupted. The results of numerical simulation are presented to investigate the influence of this factor on the final quality of the casting. The model neglects the fluid motion in the liquid and solid-liquid regions and replaces the influence of the mold with appropriate boundary conditions.
Źródło:: Journal of Applied Mathematics and Computational Mechanics; 2023, 22, 2; 75--86
2299-9965
Pojawia się w:: Journal of Applied Mathematics and Computational Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: The influence of L-phenylalanine, methyl jasmonate and sucrose concentration on the accumulation of phenolic acids in Exacum affine Balf. f. ex Regel shoot culture
Autorzy:: Skrzypczak-Pietraszek, Ewa
Słota, Joanna
Pietraszek, Jacek
Powiązania:: https://bibliotekanauki.pl/articles/1039329.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: Exacum affine Balf. f. ex Regel
Persian violet
elicitation
precursor feeding
L-phenylalanine
methyl jasmonate
sucrose concentration
Opis:: Phenolic acids are an important group of plant secondary metabolites with various, valuable therapeutic properties. Apart from plants growing in the open air, tissue cultures can be an alternative source of the secondary metabolites. The yield of their accumulation in in vitro cultures can be increased by different methods, including culture medium supplementation with precursors, elicitors and changing the standard amounts of the medium components. The purpose of this study was to investigate the influence of the precursor (L-phenylalanine), the elicitor (methyl jasmonate) and a higher sucrose concentration on the phenolic acids accumulation in the agitated shoot cultures of Exacum affine Balf. f. ex Regel (Gentianaceae). Qualitative and quantitative analyses of the phenolic acids in methanolic extracts from the biomass were conducted by applying the HPLC method. Fourteen phenolic acids and cinnamic acid were found in all samples. The total content of free phenolic acids increased from approximately 0.242% to 0.635% (2.6-fold) and the total content of the whole phenolic acids (free and bound) - from 0.712% to 1.160% (1.6-fold). The studies show that the best variant for the accumulation of most of the identified phenolic acids contained 6% of sucrose (double the standard amount), L-phenylalanine 1.6 gL-1 of medium and methyl jasmonate 100 μM. The analysis of the results in the experiment presented here showed that it is possible to increase the accumulation of the phenolic acids in Exacum affine shoot cultures - by adding the precursor (L-phenylalanine), the elicitor (methyl jasmonate) and by increasing the sucrose concentration.
Źródło:: Acta Biochimica Polonica; 2014, 61, 1; 47-53
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Monitoring risk behaviour in adolescent pupils regarding consumption of psychoactive substances
Autorzy:: Wojtyła-Buciora, Paulina
Klimberg, Aneta
Kapka-Skrzypczak, Lucyna Kapka-Skrzypczak
Diatczyk, Jarosław
Urbaniak, Monika
Ulatowska-Szostak, Ewa
Bołdowski, Tomasz
Wojtyła, Andrzej
Marcinkowski, Jerzy T.
Powiązania:: https://bibliotekanauki.pl/articles/989849.pdf
Data publikacji:: 2017
Wydawca:: Instytut Medycyny Wsi
Tematy:: drugs/narcotics
designer drugs (dds)/legal highs
adolescents/youth
Opis:: Introduction. Taking psychoactive substances constitutes a significant problem for Public Health, particularly in preventing drug abuse and addiction. Objectives. To estimate the amount and incidence of drug consumption in middle and high school pupils, including the circumstances in which drug taking first started, and to determine pupils’ knowledge about the consequences of taking psychoactive substances and designer drugs (DDs). Materials and methods. A randomised study was conducted throughout Poland on 9,360 pupils attending middle school (junior high school) in 2009 and 7,971 pupils from middle and high school pupils in 2011. The survey consisted of a questionnaire devised by the Chief Sanitary Inspectorate (GIS) and the replies obtained were subject to the relevant statistical analyses. Results. Drug taking was found to have increased between 2009–2011, especially among those attending high school; proportionally rising from 4% – 11%. The numbers who had ever taken designer drugs were 3% for middle school pupils and 4% from high school. Conclusions. 1) Adolescent drug consumption has increased, particularly in those of older age and in boys. 2) Despite the only brief interval for which designer drugs were legal, they have gained high popularity among the young. 3) Adolescents have insufficient knowledge about the dangers of using DDs. 4) Faced with the growing threat of a dynamic designer drug market, appropriate counter-measures in education and prevention are therefore necessary.
Źródło:: Annals of Agricultural and Environmental Medicine; 2017, 24, 2
1232-1966
Pojawia się w:: Annals of Agricultural and Environmental Medicine
Dostawca treści:: Biblioteka Nauki

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