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Classical quasi-steady state reduction—A mathematical characterization [PDF]
Physica D: Nonlinear Phenomena, 2016 We discuss parameter dependent polynomial ordinary differential equations that model chemical reaction networks. By classical quasi-steady state (QSS) reduction we understand the following familiar heuristic: Set the rate of change for certain (a priori chosen) variables equal to zero and use the resulting algebraic equations to obtain a system of ...
Alexandra Goeke +2 more
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Fluids, 2021 In this paper, we consider the poroelasticity problem in fractured and heterogeneous media. The mathematical model contains a coupled system of equations for fluid pressures and displacements in heterogeneous media.
Aleksei Tyrylgin +4 more
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Exploring Exceptional Education Preservice Teachers’ Mathematics Anxiety
International Journal for the Scholarship of Teaching and Learning, 2021 This study investigated preservice teachers’ levels of mathematics anxiety before and after a mathematics methods course. Changes were measured using manipulatives and other activities to make mathematics concepts more concrete and meaningful.
Gina Gresham
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Mathematics, 2021 In this paper, we present a multiscale model reduction technique for unsaturated filtration problem in fractured porous media using an Online Generalized Multiscale finite element method. The flow problem in unsaturated soils is described by the Richards
Denis Spiridonov +3 more
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DG-GMsFEM for Problems in Perforated Domains with Non-Homogeneous Boundary Conditions
Computation, 2021 Problems in perforated media are complex and require high resolution grid construction to capture complex irregular perforation boundaries leading to the large discrete system of equations. In this paper, we develop a multiscale model reduction technique
Valentin Alekseev +3 more
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Generalized Multiscale Finite Element Method for Elastic Wave Propagation in the Frequency Domain
Computation, 2020 In this work, we consider elastic wave propagation in fractured media. The mathematical model is described by the Helmholtz problem related to wave propagation with specific interface conditions (Linear Slip Model, LSM) on the fracture in the frequency ...
Uygulana Gavrilieva +2 more
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ANALISIS LITERASI DIGITAL GURU MATEMATIKA MTSN 1 KUTAI KARTANEGARA
Jurnal Magister Pendidikan Matematika, 2023 This study aims to determine the digital literacy of MTsN 1 Kutai Kartanegara mathematics teachers in preparing questions in mathematics learning. This research is a descriptive qualitative research. The subjects of this research are mathematics teachers
Zainuddin Untu +2 more
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Mathematics, 2020 In this paper, we consider unsaturated filtration in heterogeneous porous media with rough surface topography. The surface topography plays an important role in determining the flow process and includes multiscale features.
Denis Spiridonov +4 more
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Al Khawarizmi, 2022 This study aims to determine the mathematics connection ability of VIII Grade students in solving algebraic questions in one of the public junior high schools in Makassar City. This research was qualitative.
Irwansyah Rahman +2 more
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Computation, 2020 In this paper, we consider a coupled system of equations that describes simplified magnetohydrodynamics (MHD) problem in perforated domains. We construct a fine grid that resolves the perforations on the grid level in order to use a traditional ...
Valentin Alekseev +4 more
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