Results 41 to 50 of about 558 (180)

Double resolution microwave holography [PDF]

open access: yes, 1976
Includes bibliographical references.This thesis endeavours to record the development and subsequent evaluation of a simple technique for the recording of microwave holograms using common hardware components, which offers the possibility of significant ...
Nilsen, Christopher Shakespeare
core  

Bridging Optical and Mechanical Metamaterial/Metasurface Realms Toward Integrated Meta‐Systems

open access: yesAdvanced Optical Materials, Volume 14, Issue 14, 10 April 2026.
This perspective describes the rise of metamaterials in the field of materials science, specifically with optical and mechanical functionality. Fundamentals of both optical and mechanical metamaterials are discussed with a review of state‐of‐the‐art metamaterial science.
Justin Brackenridge   +2 more
wiley   +1 more source

The relationship between sound field reproduction and Near-Field Acoustical Holography [PDF]

open access: yes, 2010
The problem of reproducing a desired sound field with an array of loudspeakers and the technique known as Near-Field Acoustical Holography share some fundamental theoretical aspects.
Fazi, Filippo M., Nelson, Philip A.
core  

Research on quantitative mechanism of Kirchhoff diffraction acoustical holography [PDF]

open access: yes, 2019
In the method of far-field acoustic holographic noise identification, the Kirchhoff formula has been widely used. Achievement of reconstruction is the outstanding advantage of acoustical holography over the widely-used beam-forming method. In this paper,
Rujia Wang
core   +1 more source

Electromagnetic Perception With Artificial Intelligence‐Empowered Programable Metasurface: From Data‐Driven Imaging to Semantic Sensing

open access: yesAdvanced Photonics Research, Volume 7, Issue 4, April 2026.
This review chronicles the evolution of intelligent electromagnetic (EM) perception systems empowered by metasurfaces and artificial intelligence. The progression from data‐driven imaging with implicit priors to semantic sensing with explicit priors is systematically reviewed.
Xingrui Zhou   +5 more
wiley   +1 more source

Hitchhiker's Guide to the Swampland: The Cosmologist's Handbook to the String‐Theoretical Swampland Programme

open access: yesFortschritte der Physik, Volume 74, Issue 4, April 2026.
Abstract String theory has strong implications for cosmology, implying the absence of a cosmological constant, ruling out single‐field slow‐roll inflation, and that black holes decay. The origins of these statements are elucidated within the string‐theoretical swampland programme.
Kay Lehnert
wiley   +1 more source

3D Printing Strategies for Bioengineering Human Cornea

open access: yesAdvanced Healthcare Materials, Volume 15, Issue 10, 13 March 2026.
This review highlights recent progress in 3D bioprinting strategies for engineering human corneas. Key aspects include the replication of corneal transparency, curvature, and biomechanical properties, alongside innovations in recent advancements in 3D printing methods, which benefit in overcoming current challenges.
Yunong Yuan   +4 more
wiley   +1 more source

Ultrasound in Women's Health: Mechanisms, Applications, and Emerging Opportunities

open access: yesAdvanced Materials, Volume 38, Issue 14, 6 March 2026.
As healthcare moves toward decentralization, ultrasound technologies are evolving from strictly imaging tools in clinical settings into versatile diagnostic and therapeutic platforms, with growing roles addressing women's health needs. This review highlights how ultrasound's underlying physical mechanisms can be harnessed to reduce disparities in women'
Sarah B. Ornellas   +7 more
wiley   +1 more source

Engineered Optical Fibers for Deep‐Tissue Applications

open access: yesAdvanced Optical Materials, Volume 14, Issue 10, 13 March 2026.
This review establishes a foundational framework for designing optical fibers for deep‐tissue medicine. It systematically links material innovations like polymers and hydrogels with structural paradigms to enable state‐of‐the‐art diagnostics, including endoscopy and biosensing, and targeted therapeutics, guiding future clinical translation.
Yuzhen Li   +16 more
wiley   +1 more source

Wavelet-based non-stationary near-field acoustical holography [PDF]

open access: yes, 2013
International audienceNear field acoustical holography (NAH) consists in reconstructing the pressure field radiated by a set of sources from the measurements received by a microphone array. Originally developed for stationary sound fields, this technique
Taher, Fakhfakh   +4 more
core   +1 more source

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