Results 21 to 30 of about 4,296,240 (247)

Hierarchical Physical-Cyber Encryption via Metasurface-Encoded Holographic Keys. [PDF]

Adv Sci (Weinh)
ABSTRACT Physical‐layer encryption based on metasurfaces has emerged as a promising alternative to conventional algorithmic cryptography by embedding security into physical processes. However, most existing metasurface‐based encryption schemes operate within single‐stage or static frameworks, where correct physical illumination directly reveals the ...
Liu Z, Dai C, Zhu W, Yang R, Zhang B, Zhang L, Du B, Wang S, Hu G.   +8 more
europepmc   +2 more sources

Electrically Tunable Hydrogen-Bonded Liquid Crystal Phase Control Device

Applied Sciences, 2018
Terahertz waves have attracted much attention mainly because of their potential in imaging, security checking, nondestructive testing, and information and communication technologies.
Ryota Ito, Michinori Honma, Toshiaki Nose   +2 more
doaj   +1 more source

Photoelastic Analysis through Jones Matrix Imaging Fourier Polarimetry.

JSME International Journal Series A, 2000
The paper presents further development of the authors' hybrid method for the three-dimensional nondestructive photielastic analysis. The general arrangement and measurement procedure of a Jones matrix imaging Fourier polarimeter is described with emphasis in error analysis.
Berezhna, Svitlana, Berezhnyy, Ihor, Takashi, Masahisa   +2 more
openaire   +2 more sources

Visual and Thermal Image Processing for Facial Specific Landmark Detection to Infer Emotions in a Child-Robot Interaction

Sensors, 2019
Child-Robot Interaction (CRI) has become increasingly addressed in research and applications. This work proposes a system for emotion recognition in children, recording facial images by both visual (RGB—red, green and blue) and Infrared Thermal ...
Christiane Goulart, Carlos Valadão, Denis Delisle-Rodriguez, Douglas Funayama, Alvaro Favarato, Guilherme Baldo, Vinícius Binotte, Eliete Caldeira, Teodiano Bastos-Filho   +8 more
doaj   +1 more source

Directional clustering through matrix factorization [PDF]

, 2016
This paper deals with a clustering problem where feature vectors are clustered depending on the angle between feature vectors, that is, feature vectors are grouped together if they point roughly in the same direction.
Blumensath, Thomas
core   +1 more source

Noninvasive molecular imaging of neuroinflammation [PDF]

, 2011
Inflammation is a highly dynamic and complex adaptive process to preserve and restore tissue homeostasis. Originally viewed as an immune-privileged organ, the central nervous system (CNS) is now recognized to have a constant interplay with the innate and
Jacobs, A.H. (Andreas), Bertrand Tavitian, Windhorst, A.D., Lammertsma, A.A., Andreas H Jacobs, Jacobs, A.H., Jacobs, Andreas H., Tavitian, B. (Bertrand), INMiND consortium, Tavitian, Bertrand, Boutin, Herve; id_orcid, Planas, Anna M., Tavitian, B., et al., HENEKA, Michael, Jacobs, Andreas H   +15 more
core   +1 more source

Jones-matrix dual-comb spectroscopic polarimetry

, 2023
Spectroscopic polarimetry (SP) is a powerful tool for evaluation of thin film, optical materials, and biological samples because it can provide both polarimetric and spectroscopic characteristics of objects.
Yu Tokizane (7822247), Akifumi Asahara (5134856), Takeo Minamikawa (736240), Kaoru Minoshima (3976985), Hiroki Kitahama (16806210), Eiji Hase (3953615), Hidenori Koresawa (7822250), Takeshi Yasui (387985)   +7 more
core   +1 more source

Generation and optimization of superpixels as image processing kernels for Jones matrix optical coherence tomography

Biomedical Optics Express, 2017
Jones matrix-based polarization sensitive optical coherence tomography (JM-OCT) simultaneously measures optical intensity, birefringence, degree of polarization uniformity, and OCT angiography. The statistics of the optical features in a local region, such as the local mean of the OCT intensity, are frequently used for image processing and the ...
Arata Miyazawa, Young-Joo Hong, Shuichi Makita, Deepa Kasaragod, Yoshiaki Yasuno   +4 more
openaire   +2 more sources

Architecture‐Driven Functional Coupling in Vertically Aligned Nanocomposites

Advanced Functional Materials, EarlyView.
Vertically aligned nanocomposites define a growth‐engineered architecture in which vertical interfaces, strain fields, defect pathways, and phase connectivity are created simultaneously. This review shows how these architectural features couple ferroic, optical, ionic, electrochemical, and device responses, establishing design rules and open challenges
Md Shatil Islam‐Shanto, Javier Zamudio‐García, Abraham Sánchez‐Caballero, David Marrero‐López, Vincenzo Esposito   +4 more
wiley   +1 more source

A handheld polarimetric imaging device and calibration technique for accurate mapping of terahertz Stokes vectors

Scientific Reports
In recent years, handheld and portable terahertz instruments have been in rapid development for various applications ranging from non-destructive testing to biomedical imaging and sensing.
Zachery B. Harris, Kuangyi Xu, M. Hassan Arbab   +2 more
doaj   +1 more source