Publications by authors named "A Picon"
On the analysis of adapting deep learning methods to hyperspectral imaging. Use case for WEEE recycling and dataset.
Spectrochim Acta A Mol Biomol Spectrosc
December 2024
Article Synopsis
- Hyperspectral imaging is increasingly using deep learning techniques instead of traditional methods for processing, but many researchers don't adequately analyze how spectral and spatial information interact.
- The paper assesses how different combinations of spatial (texture) and spectral (light wavelength) features affect deep learning models for image segmentation, focusing on performance, energy usage, and speed.
- Results indicate that integrating spatial data with spectral information enhances segmentation accuracy, but not all spectral wavelengths are needed for optimal efficiency, and adapting existing RGB image models for hyperspectral tasks needs further innovation.
Healthy non-bovine functional dairy products are reaching high interest among consumers. In the present study, an aqueous polyphenol-rich Moringa oleifera extract (MoE) and a Bifidobacterium strain of human origin (B. pseudolongum INIA P2) were added, alone or in combination, for the manufacture of three experimental and one control sheep milk cheeses.
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- The study demonstrates a method to observe topological phase transitions using x-ray absorption spectroscopy in a Chern insulator, which is adjusted through second-order hopping.
- It utilizes time-dynamics simulations with a laser-driven electron motion to create a realistic attosecond spectroscopy setup, involving a circularly polarized infrared pump pulse and an attosecond x-ray probe pulse.
- The results reveal a laser-induced dichroism spectrum that clearly indicates the topological phase transition, linking it to the system's Berry structure and broadening the applications of attosecond absorption spectroscopy to topologically complex systems.
We report the measurement of impulsive stimulated x-ray Raman scattering in neutral liquid water. An attosecond pulse drives the excitations of an electronic wavepacket in water molecules. The process comprises two steps: a transition to core-excited states near the oxygen atoms accompanied by transition to valence-excited states.
View Article and Find Full Text PDFExcitons play a key role in the linear optical response of two-dimensional (2D) materials. However, their role in the nonlinear response to intense, nonresonant, low-frequency light is often overlooked as strong fields are expected to tear the electron-hole pair apart. Using high-harmonic generation as a spectroscopic tool, we theoretically study their formation and role in the nonlinear optical response.
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