Results 81 to 90 of about 43,699 (203)

Teaching crowds: Learning and social media

open access: yesJournal of Open, Flexible and Distance Learning, 2015
In Teaching crowds: Learning and social media, Jon Dron and Terry Anderson examine the critical questions and emerging trends associated with the role of social software in the online learning environment.
Evelyn Frances Lewis
doaj   +2 more sources

Segmentación foliar en sistemas de cultivo de banano: aplicaciones del flujo de trabajo fotogramétrico y teledetección mediante imágenes multiespectrales de aeronaves no tripuladas (UAS)

open access: yesCiencia e Ingeniería Neogranadina
Este estudio presenta una metodología para lograr la segmentación foliar en sistemas de producción de cultivos de banano, utilizando imágenes multiespectrales provenientes de una aeronave no tripulada (UAS, por sus siglas en inglés), procesamiento ...
Jairo Rene Escobar Villanueva   +3 more
doaj   +1 more source

The infinite cyclohedron and its automorphism group [PDF]

open access: yes, 2014
Cyclohedra are a well-known infinite familiy of finite-dimensional polytopes that can be constructed from centrally symmetric triangulations of even-sided polygons. In this article we introduce an infinite-dimensional analogue and prove that the group of
Ariadna Fossas, Jon Mccammond, Tenas
core  

Quantum Melting of Spin Ice: Emergent Cooperative Quadrupole and Chirality

open access: yes, 2010
A quantum melting of the spin ice is proposed for pyrochlore-lattice magnets Pr$_2TM_2$O$_7$ ($TM=$Ir, Zr, and Sn). The quantum superexchange Hamiltonian having a nontrivial magnetic anisotropy is derived in the basis of atomic non-Kramers magnetic ...
Onoda, Shigeki, Tanaka, Yoichi
core   +1 more source

Análisis comparativo de tecnologías sustitutivas para la medición del potencial eólico en las instalaciones del Instituto Tecnológico Universitario Guatemala Sur

open access: yesCiencia, Tecnología y Salud
La presente investigación tiene como objetivo el análisis comparativo de tecnologías sustitutivas para la medición del potencial eólico en las instalaciones del Instituto Tecnológico Universitario Guatemala Sur.
Sergio Alejandro López Rodríguez
doaj   +1 more source

Technology, Teaching, and the Many Distances of Distance Learning

open access: yesJournal of Open, Flexible and Distance Learning, 2023
The “distance” in “distance learning”, however it is defined, normally refers to a gap between a learner and their teacher(s), typically in a formal context. In this paper I take a slightly different view.
Jon Dron
doaj  

Soft is hard and hard is easy: learning technologies and social media

open access: yesFormare, 2013
Questo articolo riguarda principalmente la natura delle tecnologie per apprendere, con una particolare attenzione ai social media. Muovendo dalla definizione fornita da W.
Jon Dron
doaj   +1 more source

Rotational modes in molecular magnets with antiferromagnetic Heisenberg exchange

open access: yes, 2000
In an effort to understand the low temperature behavior of recently synthesized molecular magnets we present numerical evidence for the existence of a rotational band in systems of quantum spins interacting with nearest-neighbor antiferromagnetic ...
A. Caneschi   +19 more
core   +2 more sources

Theoretical investigation of magnetoelectric effects in Ba2CoGe2O7

open access: yes, 2011
A joint theoretical approach, combining macroscopic symmetry analysis with microscopic methods (density functional theory and model cluster Hamiltonian), is employed to shed light on magnetoelectricity in Ba2CoGe2O7.
Kunihiko Yamauchi   +4 more
core   +1 more source

Savremeno naoružanje i vojna oprema za broj 4-2023

open access: yesVojnotehnički Glasnik, 2023
Najveći francuski dron; Ruski Ohotnik u operativnoj upotrebi; Unapređena verzija helikoptera Ka-52M u Ukrajini.
Dragan M. Vučković
doaj  

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