Results 11 to 20 of about 3,418,678 (290)

Critical Issues in Open and Distance Education Research

International Review of Research in Open and Distributed Learning, 2023
Despite its mainstreaming into the broader educational ecology, open and distance education (ODE) still leaves much to be desired in terms of both practice and research. Inspired and informed by the author’s 35 years of experience as an ODE practitioner,
Junhong Xiao
doaj   +1 more source

Wetting morphologies on an array of fibers of different radii [PDF]

, 2015
We investigate the equilibrium morphology of a finite volume of liquid placed on two parallel rigid fibers of different radii. As observed for identical radii fibers, the liquid is either in a column morphology or adopts a drop shape depending on the ...
Boulogne, François, Cébron, David, Dressaire, Emilie, Sauret, Alban, Stone, Howard A.   +4 more
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Geodesic Distance in Planar Graphs [PDF]

, 2003
We derive the exact generating function for planar maps (genus zero fatgraphs) with vertices of arbitrary even valence and with two marked points at a fixed geodesic distance. This is done in a purely combinatorial way based on a bijection with decorated
Ambjørn, Ambjørn, Bousquet-Mélou, Bousquet-Mélou, Bouttier, Bouttier, Bouttier, Brézin, Chassaing, David, Delmas, Di Francesco, Di Francesco, Distler, E. Guitter, Eynard, Gelfand, J. Bouttier, Jimbo, Kawai, Kawamoto, Knizhnik, P. Di Francesco, Schaeffer, Staudacher, Tutte, Tutte, Tutte, Tutte   +28 more
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Sparse Distributed Memory: understanding the speed and robustness of expert memory

Frontiers in Human Neuroscience, 2014
How can experts, sometimes in exacting detail, almost immediately and very precisely recall memory items from a vast repertoire? The problem in which we will be interested concerns models of theoretical neuroscience that could explain the speed and ...
Marcelo Salhab Brogliato, Daniel de Magalhães Chada, Daniel de Magalhães Chada, Alexandre eLinhares   +3 more
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A Revised Sound Energy Theory Based on a New Formula for the Reverberation Radius in Rooms with Non-Diffuse Sound Field

Archives of Acoustics, 2014
This paper discusses the concept of the reverberation radius, also known as critical distance, in rooms with non-uniformly distributed sound absorption.
Higini ARAU-PUCHADES, Umberto BERARDI
doaj   +1 more source

Critical Distance Default Values for Structural Steels and a Simple Formulation to Estimate the Apparent Fracture Toughness in U-Notched Conditions

Metals, 2018
The structural integrity assessment of components containing notch-type defects has been the subject of extensive research in the last few decades. The assumption that notches behave as cracks is generally too conservative, making it necessary to develop
Sergio Cicero, Juan Diego Fuentes, Isabela Procopio, Virginia Madrazo, Pablo González   +4 more
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Quark mass correction to the string potential [PDF]

, 1995
A consistent method for calculating the interquark potential generated by the relativistic string with massive ends is proposed. In this approach the interquark potential in the model of the Nambu--Goto string with point--like masses at its ends is ...
A. Barchielli, A. M. Chervyakov, A. M. Polyakov, A. Pais, B. M. Barbashov, B. M. Mostepanenko, D. A. Eliezer, D. B. Lichtenberg, E. C. Titchmarsh, E. Elizalde, E. T. Whittaker, G. German, G. German, G. Lambiase, G. Plunien, H. Kleinert, H. Kleinert, H. Kleinert, H. Kleinert, I. Brevik, I. E. Dzyaloshinskii, I. S. Gradshteyn, J. F. Arvis, J. Polchinski, K. Maeda, M. Lüscher, M. Lüscher, M. V. Ostrogradsky, M. V. Ostrogradsky, O. Alvarez, P. Ramond, R. D. Pisarski, R. Gregory, S. D. Odintsov, V. V. Nesterenko, V. V. Nesterenko, V. V. Nesterenko, V. V. Nesterenko, V. V. Nesterenko, W. Buchmüller, W. Kwong   +40 more
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Reverberation Radius in Real Rooms [PDF]

Telfor Journal, 2010
A reverberation radius, also called a critical distance, is an important parameter in sound reproduction. Statistical approach gives a simple formula for its calculation, and some simple methods for its measurement were described in literature.
M. Mijić, D. Mašović
doaj  

Global Persistence Exponent in Critical Dynamics: Finite Size induced Crossover [PDF]

, 2007
We extend the definition of a global order parameter to the case of a critical system confined between two infinite parallel plates separated by a finite distance $L$.
D. Chakraborty, J. K. Bhattacharjee, S. N. Majumdar, V. Dohm   +3 more
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Evaluation of train-induced vibrations in medium-to-high speed railways: a parametric study

Frontiers in Built Environment
Over the past 2 decades, China has witnessed remarkable advancements in rail transportation systems, encompassing municipal railways, intercity networks, and high-speed rail infrastructure.
Xiao Guo, Decang Tian, Jinglin Sun, Dongfeng Zhang, Yahang Liu, Jinfeng Zhang, Jinfeng Zhang   +6 more
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