Results 61 to 70 of about 1,143,358 (248)

AIRBORNE INTERFEROMETRIC SYNTHETIC APERTURE RADAR

open access: yesНаучный вестник МГТУ ГА, 2016
This article gives a brief description of the interferometric SAR mode. It gives a description and the main characteristics of some airborne interferometric SAR systems.
E. E. Nechaev, K. S. Deryabin
doaj  

The Bright Feature Transform for Prominent Point Scatterer Detection and Tone Mapping

open access: yesRemote Sensing
Detecting bright point scatterers plays an important role in assessing the quality of many sonar, radar, and medical ultrasound imaging systems, especially for characterizing the resolution.
Gregory D. Vetaw, Suren Jayasuriya
doaj   +1 more source

Coherent Absorption Reveals Colors Hidden in a Grey Fabry–Pérot Cavity

open access: yesAdvanced Optical Materials, EarlyView.
A dielectric thin film shows colors depending on its thickness; this effect can be used to encode information normally accessible through single‐beam spectroscopy. We developed a method to conceal this kind of information, based on coating the dielectric with a matched conductor, that suppresses the color‐bearing thin‐film resonances.
Giuseppe E. Lio   +10 more
wiley   +1 more source

Electrochemistry‐Enabled Optical and Plasmonic Programmable Metasurfaces

open access: yesAdvanced Optical Materials, EarlyView.
Electrochemistry is emerging as a promising approach for engineering optical and plasmonic metasurfaces, from the fabrication of nanoscale structures to their dynamic control. This Perspective reviews electrochemical strategies for creating and tuning metasurfaces, examines current challenges and opportunities, and discusses how integration with ...
Charlène Brissaud, Leonardo Scarabelli
wiley   +1 more source

100 μm Resolution Terahertz Imaging via Inverse Spherical Synthetic Aperture Radar Imaging by Terahertz Time-Domain Spectroscopy

open access: yesIEEE Journal of Microwaves
Terahertz (THz) synthetic aperture imaging enables high-resolution imaging beyond the geometric and optical constraints of conventional focused THz setups.
Tobias Kubiczek, Jan C. Balzer
doaj   +1 more source

Lucky imaging and aperture synthesis with low-redundancy apertures [PDF]

open access: yes, 2009
Lucky imaging, used with some success in astronomical and even horizontal-path imaging, relies on fleeting conditions of the atmosphere that allow momentary improvements in image quality, at least in portions of an image.
Ward, Jennifer E.   +2 more
core   +1 more source

Gonadotropin‐Inhibitory Hormone (GnIH) and Its Receptor GPR147 Mediates Acute Stress‐Induced Activation of the Locus Coeruleus‐SAM Axis

open access: yesAdvanced Science, EarlyView.
ABSTRACT Gonadotropin‐inhibitory hormone (GnIH, also known as RFamide‐related peptide‐3, RFRP‐3) is a hypothalamic neuropeptide that regulates vertebrate reproduction via its receptor GPR147. Although GnIH is known to mediate stress‐induced reproductive suppression, its role in broader stress responses remains unclear.
Jiani Zhang   +18 more
wiley   +1 more source

Distributed Aperture Coherence-synthetic Radar Technology

open access: yesLeida xuebao, 2017
The distributed aperture coherence-synthetic radar could accomplish long-range and high-precision detection performance according to include multi-unit radars and energy synthesize in space.
Lu Yaobing, Gao Hongwei, Zhou Baoliang
doaj   +1 more source

In Situ Stress‐Dispersing Hydrogel Millispheres via Load Redistribution to Restore Nucleus Pulposus Metabolic Homeostasis

open access: yesAdvanced Science, EarlyView.
Local stress concentration disrupts metabolic homeostasis and induces inflammation in the nucleus pulposus (NP), thereby accelerating intervertebral disc degeneration (IDD). A biomimetic HA/ChS hydrogel millimeter sphere (ChS@HM) is developed to enable synergistic stress dispersion and sustained hydration lubrication.
Ang Li   +4 more
wiley   +1 more source

Surface ruptures and building damage of the 2003 Bam, Iran earthquake mapped by satellite synthetic apeerture radar interferometric correlation [PDF]

open access: yes, 2005
We use the interferometric correlation from Envisat synthetic aperture radar (SAR) images to map the details of the surface ruptures related to the 26 December 2003 earthquake that devastated Bam, Iran.
Fielding, E. J.   +20 more
core   +1 more source

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