Results 41 to 50 of about 27,387 (213)
Fresnel Interferometric Imager: ground-based prototype
, 2009 The Fresnel Interferometric Imager is a space-based astronomical telescope project yielding milli-arc second angular resolution and high contrast images with loose manufacturing constraints.
Baez +15 more
core +1 more source
Refracting profiles and generalized holodiagrams [PDF]
, 2007 The recently developed concept of refracting profiles and that of refraction holodiagrams are combined so that the classical Abramson holodiagrams can be generalized taking into account a wider class of wave fronts and refraction at an interface ...
Abramson +19 more
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Um experimento simples usado na produção de placas de zonas de Fresnel
Revista Brasileira de Ensino de FísicaNeste trabalho propomos um experimento simples que tem por finalidade auxiliar no aprendizado dos fenômenos de interferência e difração da luz. Após uma análise pertinente da teoria de Fresnel da difração, os conhecimentos são aplicados na compreensão do
Márcia Muller +2 more
doaj +1 more source
Information and Telecommunication Sciences, 2017 Background. Modern methods for determining the position of the source of radio emission in the Fresnel zone from the sphericity of the electromagnetic wave front received by the linear antenna array allow solving the problem of simultaneous determination
Evgeniy Yakornov, Oleg Tsukanov
doaj +1 more source
IET Image Processing, 2021 A novel asymmetric double image encryption technique is introduced to protect the algorithm from the interlopers by using hybrid chaotic structured phase masks in Arnold and Fresnel transforms.
Shivani Yadav, Hukum Singh
doaj +1 more source
Nature Communications, 2020 Traditional methods for ultrasound detection in biomedical application suffer from limited lateral resolution. Here, the authors show that a phononic metamaterial lens can be used for spatial characterisation of subwavelength objects, even beyond the ...
Ezekiel L. Walker +3 more
doaj +1 more source
Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges
Advanced Functional Materials, EarlyView.Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley +1 more source
Nature Communications, 2022 X-ray diffractive and refractive optical elements suffer from chromatic aberrations, limiting high-resolution X-ray microscopes mainly to bright synchrotron sources.
Adam Kubec +5 more
doaj +1 more source
Advanced Science, EarlyView.Cell‐sized high‐frequency ultrasound using a lithium niobate transducer, previously ignored in reactive oxygen species (ROS) production, generated intracellular ROS at frequencies higher than conventionally used. The intracellular generation of ROS by cell‐sized high‐frequency ultrasound revealed in this study is expected to be applied to innovative ...
Kotaro Fujishiro +4 more
wiley +1 more source
Вестник Северо-Кавказского федерального университета, 2022 In article provides methodic of small-scale ionosphere irregularities selection based on accumulated data about total electronic content, given via transionospheric monitoring with multi-phased GNSS receiver.
Vladimir P. Pashintsev +3 more
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