Results 111 to 120 of about 1,807,617 (309)

Distributed Fiber Optics Strain Measurements for Monitoring Geotechnical Structures [PDF]

open access: yes, 2008
Recent advances in strain measurement using optical fibers provide new opportunities for monitoring the performance of geotechnical structures during and after construction.
Bennett, Peter J.   +2 more
core   +1 more source

Performance Monitoring of Optical Network using Bit Error Rate [PDF]

open access: yes, 2015
With the increase in demand of broadband services, channel complexity has been increased. Therefore it has become necessary to monitor the performance of optical networks.
, Ankush Chaudhary, Karamjit Kaur, Anil Kumar
core   +2 more sources

ORCHESTRA - Optical performance monitoring enabling flexible networking

open access: yesInternational Conference on Transparent Optical Networks, 2015
An optical network, like any system, has to be observable before it can become subject to optimization, and this is the main capability that ORCHESTRA project introduces.
K. Christodoulopoulos   +18 more
semanticscholar   +1 more source

Digital Light Processing of 2D Lattice Composites for Tunable Self‐Sensing and Mechanical Performance

open access: yesAdvanced Engineering Materials, EarlyView., 2023
The study presents the mechanical and in situ sensing performance of digital light processing‐enabled 2D lattice nanocomposites under monotonic tensile and repeated cyclic loading, and provides guidelines for the design of architectures suitable for strain sensors and smart lightweight structures.
Omar Waqas Saadi   +3 more
wiley   +1 more source

Micro-sized tunable liquid crystal optical filters [PDF]

open access: yes, 2017
Liquid Crystal Arrayed Microcavities (LCAM) is a new technology for ultra-narrow optical filtering (FWHM ~ 0.1 nm) that uses pico-liter volume Fabry-Perot type optical cavities filled with liquid crystal for tuning. LCAMs are sub-nm spectral resolution filters, which utilize well-established laser writing, thin film deposition, and wafer manufacturing ...
arxiv   +1 more source

Azobenzene-based gel coated fibre Bragg grating sensor for moisture measurement [PDF]

open access: yes, 2016
A fibre Bragg grating sensor is coated with a novel polymer gel in order to investigate its suitability for nondestructive measurement of moisture in materials that can potentially lose their integrity due to moisture ingress.
Moniruzzaman, Mohammed, Rock, John
core   +3 more sources

Simulations of Observations with the Optical Monitor of the X-Ray Multi-Mirror Satellite [PDF]

open access: yes, 2000
This paper addresses the question of the observations to be performed with the Optical Monitor (OM) of the X-ray Multi-Mirror Satellite (XMM) under several aspects. First, we discuss XMM-OM's photometric system and its colour transformations towards the standard UBV system.
arxiv   +1 more source

Source monitoring for continuous-variable quantum key distribution [PDF]

open access: yes, 2011
The noise in optical source needs to be characterized for the security of continuous-variable quantum key distribution (CVQKD). Two feasible schemes, based on either active optical switch or passive beamsplitter are proposed to monitor the variance of source noise, through which, Eve's knowledge can be properly estimated.
arxiv   +1 more source

Characterization of a graphite epoxy optical bench during thermal vacuum cycling [PDF]

open access: yes
In-situ monitoring of the Wide-Field/Planetary Camera, a Hubble Space Telescope science instrument, was performed in a vacuum environment to better understand the formation of ice on cooled optical detectors.
Hansen, Patricia A.   +3 more
core   +1 more source

Effects of cardiac motion on dose distribution during stereotactic arrhythmia radioablation treatment: A simulation and phantom study

open access: yesJournal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose Cardiac motion may degrade dose distribution during stereotactic arrhythmia radioablation using the CyberKnife system, a robotic radiosurgery system. This study evaluated the dose distribution changes using a self‐made cardiac dynamic platform that mimics cardiac motion. Methods The cardiac dynamic platform was operated with amplitudes
Takayuki Miyachi   +6 more
wiley   +1 more source

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