Results 11 to 20 of about 942,030 (275)

Non-Euclidean cloaking for light waves [PDF]

open access: yes, 2009
Non-Euclidean geometry combined with transformation optics has recently led to the proposal of an invisibility cloak that avoids optical singularities and therefore can work, in principle, in a broad band of the spectrum [U. Leonhardt and T. Tyc, Science
Chan, Che Ting   +3 more
core   +2 more sources

EVM Loss: A Loss Function for Training Neural Networks in Communication Systems

open access: yesSensors, 2021
Neural networks and their application in communication systems are receiving growing attention from both academia and industry. The authors note that there is a disconnect between the typical objective functions of these neural networks with regards to ...
Scott Stainton   +3 more
doaj   +1 more source

Multi-Spectral Optimization for Tissue Probing Using Machine Learning

open access: yesIEEE Photonics Journal, 2021
An optical approach for pigmented lesions detection in human skin is presented. As differences between normal skin tissue and pigmentation tissue (and even a change in pigmentation development) can be detected by their optical properties, this paper ...
Yarden Tzabari Kelman   +4 more
doaj   +1 more source

Phytoplankton Growth and Productivity in the Western North Atlantic: Observations of Regional Variability From the NAAMES Field Campaigns

open access: yesFrontiers in Marine Science, 2020
The ability to quantify spatio-temporal variability in phytoplankton growth and productivity is essential to improving our understanding of global carbon dynamics and trophic energy flow.
James Fox   +11 more
doaj   +1 more source

New Supersonic Nozzle Test Rig Used to Generate Condensing Flow Test Data According to Barschdorff

open access: yesInternational Journal of Turbomachinery, Propulsion and Power, 2023
Considerable progress has been achieved in recent decades in understanding the phenomena related to the onset of condensation in steam flows, both experimentally and especially numerically.
Manuel Ernesto Maqueo Martínez   +3 more
doaj   +1 more source

The Influence of Causal Thinking with Scaffolding Type 2A and 2B on Optics Problem-Solving Ability

open access: yesJurnal Pendidikan Fisika Indonesia, 2018
The effectiveness of learning is affected by the assistance stages (scaffolding) provided. For example, the scaffolding of type 2a and type 2b supports the causal-thinking approach in learning.
N. Nurmadiah, J. Rokhmat, S. Ayub
doaj   +1 more source

Photobiological Effects on Ice Algae of a Rapid Whole-Fjord Loss of Snow Cover during Spring Growth in Kangerlussuaq, a West Greenland Fjord

open access: yesJournal of Marine Science and Engineering, 2021
Snow cover on sea ice is the most important factor controlling light availability for sea ice algae, but it is predicted by climate models to become more variable and stochastic.
Brian K. Sorrell   +3 more
doaj   +1 more source

Simulation Study of Vertical p–n Junction Photodiodes’ Optical Performance According to CMOS Technology

open access: yesApplied Sciences, 2022
CMOS photodiodes have been widely reported in microsystem applications. This article presents the design and numerical simulation of p–n junction photodiodes, using COMSOL Multiphysics, for three CMOS technologies (0.18 μm, 0.35 μm and 0.7 μm) and three ...
Gabriel M. Ferreira   +3 more
doaj   +1 more source

Manganese(II) Bromide Compound with Diprotonated 1-Hydroxy-2-(pyridin-2-yl)-4,5,6,7-tetrahydrobenzimidazole: Dual Emission and the Effect of Proton Transfers

open access: yesInorganics, 2022
An organic–inorganic cation–anion manganese(II) tetrabromide compound with diprotonated 1-hydroxy-2-(pyridin-2-yl)-4,5,6,7-tetrahydrobenzimidazole, [H3L][MnBr4][H2O], has been synthesized and investigated.
Alexey S. Berezin   +4 more
doaj   +1 more source

Transformation Optics and the Geometry of Light [PDF]

open access: yes, 2008
Metamaterials are beginning to transform optics and microwave technology thanks to their versatile properties that, in many cases, can be tailored according to practical needs and desires.
Leonhardt, Ulf, Philbin, Thomas G.
core   +2 more sources

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