Results 121 to 130 of about 572,993 (300)

Recognizing Sketches of Euler Diagrams Drawn with Ellipses [PDF]

open access: yes, 2010
Euler diagrams form the basis of a number of visual languages. However, the existing tool support for creating Euler diagrams is limited to generic diagram editing software that uses mouse and keyboard interfaces.
Rodgers, Peter   +3 more
core  

Experimental methods in chemical engineering: The scientific method versus engineering design methodology

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract Engineering graduate students confuse the scientific method and problem solving when presenting their pre‐doctoral exams and theses: Science discourse adopts question and hypotheses to assert and establish a study's rationale, while it is problem and objectives in engineering design.
Gregory S. Patience   +4 more
wiley   +1 more source

Preventing wall deposition in duct flows: The role of particle number density and flow direction

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
Abstract Particle deposition in wall‐bounded turbulent flows is a challenge in many industries, including pneumatic conveying, filtration, and related applications. When particles accumulate near boundaries, they reduce transport efficiency, alter near‐wall flow structures, and cause blockage.
Gizem Ozler, Holger Grosshans
wiley   +1 more source

Coupled heat and mass transfer in reactive parallel‐plate flow: A perturbative Graetz model with modal symmetry and Arrhenius kinetics

open access: yesThe Canadian Journal of Chemical Engineering, EarlyView.
A perturbative Graetz model describes coupled heat and mass transfer in reactive Couette–Poiseuille flow between parallel plates. Viscous dissipation and heat of reaction produce a small temperature rise, which enhances Arrhenius reaction rates and modestly accelerates axial species conversion in the small‐Brinkman‐number regime.
Leonardo Damián Soria Rodríguez   +1 more
wiley   +1 more source

The Sum of Reciprocals of Polygonal Numbers: A Spreadsheet Based Illustration

open access: yesSpreadsheets in Education
This pedagogic note considers the sum of reciprocals of polygonal numbers. Closed form expressions of the sum are currently available for twelve specific cases, from triangles to 26-sided polygons. Several of these expressions are from featured solutions
Clarence C. Y. Kwan
doaj  

The decoupling of moduli about the standard embedding

open access: yesJournal of High Energy Physics
We study the cohomology of an elliptic differential complex arising from the infinitesimal moduli of heterotic string theory in the supergravity approximation.
Beatrice Chisamanga   +3 more
doaj   +1 more source

Application of nonlocal elasticity and DQM to dynamic analysis of curved nanobeams

open access: yesLatin American Journal of Solids and Structures
In this paper, a new numerical technique, the differential quadrature method (DQM) has been developed for dynamic analysis of the nanobeams in the polar coordinate system. DQ approximation of the required partial derivatives is given by a weighted linear
Hassan Kananipour   +2 more
doaj   +1 more source

Computing the Region Areas of Euler Diagrams Drawn with Three Ellipses [PDF]

open access: yes, 2014
Ellipses generate accurate area-proportional Euler diagrams for more data than is possible with circles. However, computing the region areas is difficult as ellipses have various degrees of freedom.
Luana Micallef   +3 more
core  

Front Propagation Through a Perforated Wall

open access: yesCommunications on Pure and Applied Mathematics, EarlyView.
ABSTRACT We consider a bistable reaction– diffusion equation ut=Δu+f(u)$u_t=\Delta u +f(u)$ on RN${\mathbb {R}}^N$ in the presence of an obstacle K$K$, which is a wall of infinite span with many holes. More precisely, K$K$ is a closed subset of RN${\mathbb {R}}^N$ with smooth boundary such that its projection onto the x1$x_1$‐axis is bounded and that ...
Henri Berestycki   +2 more
wiley   +1 more source

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