Results 91 to 100 of about 7,364,855 (292)

Water ow on vegetated hill. 1D shallow water equation type model

open access: yesAnalele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2015
A mathematical model for the water ow on a hill covered by variable distributed vegetation is proposed in this article. The model takes into account the variation of the geometrical properties of the terrain surface, but it assumes that the surface ...
Ion Stelian   +4 more
doaj   +1 more source

Mathematical properties of ordered amplitude graphs [PDF]

open access: yesNuclear Physics B, 1980
Abstract This paper elaborates on some mathematical aspects of the ordered hadronic amplitudes. In particular, a systematic way of constructing the ordered Hilbert space is presented and it is shown to be the most general Hilbert space consistent with unitarity of the S -matrix.
openaire   +2 more sources

Workflow for Design of Experiments‐Based Modeling of Species Transport and Growth Kinetics in GaN Hydride Vapor Phase Epitaxy

open access: yesAdvanced Engineering Materials, EarlyView.
A novel workflow for investigating hydride vapor phase epitaxy for GaN bulk crystal growth is proposed. It combines Design of experiments (DoE) with physical simulations of mass transport and crystal growth kinetics, serving as an intermediate step between DoE and experiments.
J. Tomkovič   +7 more
wiley   +1 more source

Mathematical reasoning in teachers' presentations

open access: yes, 2012
This paper presents a study of the opportunities presented to students that allow them to learn different types of mathematical reasoning during teachers’ ordinary task solving presentations. The characteristics of algorithmic and creative reasoning that
Lithner, Johan,, Bergqvist, Tomas,
core   +1 more source

Reverse mathematics and Ramsey's property for trees

open access: yesThe Journal of Symbolic Logic, 2010
AbstractWe show, relative to the base theory RCA0: A nontrivial tree satisfies Ramsey's Theorem only if it is biembeddable with the complete binary tree. There is a class of partial orderings for which Ramsey's Theorem for pairs is equivalent to ACA0. Ramsey's Theorem for singletons for the complete binary tree is stronger than .
Jared Corduan   +2 more
openaire   +3 more sources

Comparison of Triply Periodic Minimal Surface Energy Absorbers Under Uniaxial Compressive Loading

open access: yesAdvanced Engineering Materials, EarlyView.
This study investigates LCD 3D printed Triply Periodic Minimal Surface (TPMS) structures as mechanical energy absorbers. By comparing various base designs and layered combinations under uniaxial compression, it identifies that a Diamond‐Gyroid sandwich structure offers superior performance.
Sergej Grednev   +2 more
wiley   +1 more source

Reverse mathematics and properties of finite character

open access: yesAnnals of Pure and Applied Logic, 2012
This paper corresponds to section 4 of arXiv:1009.3242, "Reverse mathematics and equivalents of the axiom of choice", which has been abbreviated and divided into two pieces for ...
Damir D. Dzhafarov, Carl Mummert
openaire   +3 more sources

New AI‐Assisted Approach for Expanding the Solution Space: Application to Lattice Structure Design

open access: yesAdvanced Engineering Materials, EarlyView.
This work introduces an innovative framework for designing structured materials by ex panding the design space through reparameterization of qualitative variables into continuous structural descriptors. Combined with machine‐learning‐based prediction and multi‐objective optimization, the approach enables the discovery of novel lattice architectures ...
G. H. Gahimbare   +5 more
wiley   +1 more source

Survey of mathematical foundations of QFT and perturbative string theory [PDF]

open access: yes, 2011
Recent years have seen noteworthy progress in the mathematical formulation of quantum field theory and perturbative string theory. We give a brief survey of these developments.
Sati, H.   +3 more
core  

MATHEMATICAL MODELLING OF CaCl2 AQUEOUS SOLUTIONS THERMOPHYSICAL PROPERTIES

open access: yesScientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, 2016
Calcium chloride is an inorganic salt used in its solid state or as aqueous solutions in a multitude of research and industrial areas going from chemical industry to food, cosmetics or drugs production.
CRISTINA G. GRIGORAŞ, GABRIELA MUNTIANU, LUCIAN GAVRILĂ *   +2 more
doaj  

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