Results 11 to 20 of about 638,679 (328)

Investigation of lacrimal sac space-occupying lesions using color doppler ultrasound, computed tomography, and computed tomography dacryocystography [PDF]

open access: yesInternational Journal of Ophthalmology, 2023
AIM: To observe the imaging features of color Doppler ultrasound (CDU) and computed tomography (CT) or computed tomography dacryocystography (CT-DCG) in different types of lacrimal sac space-occupying lesions (SOLs).
Zhen-Bin Qian   +5 more
doaj   +1 more source

Análisis multitemporal del urbanismo expansivo en el corredor del Henares. Aportación de las imágenes de satélite

open access: yesEstudios Geográficos, 2014
El objetivo del estudio es conocer la evolución del sellado del suelo en un área con alta presión antrópica afectada por el “efecto frontera” debido a su proximidad a una gran ciudad.
María Pilar García Rodríguez   +1 more
doaj   +1 more source

Pipeline model of a Fermi-sea electron pump [PDF]

open access: yes, 2000
The use of a band offset between the two leads of an electron pump driven by a local oscillating voltage is shown to increase the pump current dramatically.
Sols, Fernando, Wagner, Mathias
core   +2 more sources

Coherent ratchets in driven Bose-Einstein condensates [PDF]

open access: yes, 2009
We study the response of a Bose-Einstein condensate to an unbiased periodic driving potential. By controlling the space and time symmetries of the driving we show how a directed current can be induced, producing a coherent quantum ratchet.
Creffield, C. E., Sols, F.
core   +3 more sources

Generation of uniform synthetic magnetic fields by split driving of an optical lattice [PDF]

open access: yes, 2014
We describe a method to generate a synthetic gauge potential for ultracold atoms held in an optical lattice. Our approach uses a time-periodic driving potential based on two quickly alternating signals to engineer the appropriate Aharonov-Bohm phases ...
Creffield, C. E., Sols, F.
core   +3 more sources

Controlled generation of coherent matter-currents using a periodic driving field [PDF]

open access: yes, 2008
We study the effect of a strong, oscillating driving field on the dynamics of ultracold bosons held in an optical lattice. Modeling the system as a Bose-Hubbard model, we show how the driving field can be used to produce and maintain a coherent atomic ...
Creffield, C. E., Sols, F.
core   +3 more sources

Racionalidad de la inducción como minimización entrópica

open access: yesScientia et Fides, 2016
Rationality of induction as entropic minimizationIn favour of a fundamental aspect of the epistemology of Mariano Artigas –his commitment to the quest for truth on the part of the scientific theory– I argue about the rationality of the process of ...
Ignacio Sols
doaj   +1 more source

Perturbative analysis of coherent quantum ratchets in cold atom systems [PDF]

open access: yes, 2010
We present a perturbative study of the response of cold atoms in an optical lattice to a weak time- and space-asymmetric periodic driving signal. In the noninteracting limit, and for a finite set of resonant frequencies, we show how a coherent, long ...
Creffield, Charles E.   +2 more
core   +3 more sources

Nanocomposite organomineral hybrid materials. Part 3

open access: yesНанотехнологии в строительстве, 2016
The paper addresses the issues of alkoxide method of sol-gel synthesis and non-hydrolytic method of sol-gel synthesis and colloidal method of sol-gel synthesis.
KUDRYAVTSEV Pavel Gennadievich   +1 more
doaj   +1 more source

Artificialisation des sols et érosion hydrique dans la ville de Daloa, centre-ouest de la Côte d’Ivoire [PDF]

open access: yesZiglôbitha, 2023
Résumé : L’artificialisation des sols induite par l’étalement de la tache urbaine de Daloa pose le problème de l’exposition des sols au risque d’érosion hydrique.
TRAORE Kinakpefan Michel, Sahoti OUATTARA, & KOUASSI Mangoua Akissi Hélène-Francette
doaj  

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