Results 31 to 40 of about 3,501,692 (262)

Axial length acquisition success rates and agreement of two swept-source optical biometers in eyes with dense cataracts

Frontiers in Medicine
BackgroundSwept-source optical coherence tomography–based (SS-OCT) biometers have been used in different clinical studies with the aim of assessing the accuracy of the technique, specifically in eyes with dense cataracts. Our objective is to evaluate the
Paz Orts-Vila, Santiago Tañá-Sanz, Cristina Tello-Elordi, Robert Montés-Micó, Pedro Tañá-Rivero   +4 more
doaj   +1 more source

High sensitivity optical coherence detector optimization [PDF]

, 2001
An optimal optical filtering scheme for an optical coherence detection system gives very high detection sensitivities (-30dB) for a partially coherent source.
Coutinho, R.C., French, H.A., Selviah, D.R., H.D. Griffiths, R.C. Coutinho, H.A. French, Griffiths, H.D., D.R. Selviah   +7 more
core   +1 more source

Experimental Estimation of Kinematic Viscosity of Low-Density Air Using Optically Derived Macroscopic Transient Flow Parameters

Sensors
This article presents a novel experimental method of calculation of kinematic viscosity parameter for rarefied/low-density air using the analysis of optically recorded oscillations of the stratospheric balloon mission parachute’s canopy.
Tomasz Aleksander Miś
doaj   +1 more source

Combined Optical and Radio‐Frequency Perspectives on the Time Evolution of Lightning Measured by the FORTE Satellite

Earth and Space Science, 2022
We use a cluster feature data set for the Fast On‐orbit Recording of Transient Events (FORTE) satellite that combines detections from its pixelated Lightning Locating System (LLS), photodiode detector (PDD) and Radio‐Frequency (RF) instrumentation to ...
Michael Peterson
doaj   +1 more source

An optical threshold function based on polarization rotation in a single semiconductor optical amplifier [PDF]

, 2007
Optical threshold functions are a basic building block for alloptical signal processing, and this paper investigates a threshold function design reliant on a single active element. An optical threshold function based on nonlinear polarization rotation in
Liu, Y Yong, Vegas Olmos, J.J., Geldenhuys, R., Leuschner, F.W., Leuschner, FW, Khoe, GD Giok-Djan, Liu, Y., Khoe, G.D., Dorren, HJS Harm, Vegas Olmos, JJ Juan José, Dorren, H.J.S., Geldenhuys, R   +11 more
core   +2 more sources

TDM 100Gbit/s packet switching in an optical shufflenet [PDF]

, 1997
In this paper we present an OTDM multihop prototype network developed in the Lightwave Communication Laboratory at Princeton University. Employing a new self-routing scheme with special address coding suitable for optical packet switching, we demonstrate
Chang, T.G, Glesk, Ivan, Yu, B. Y., Deng, K.-L., Prucnal, P.R., Zhou, Deyu, Kang, K.I., Runser, R.J., Toliver, P., Seo, S. W.   +9 more
core   +3 more sources

Electrostatic MEMS Phase Shifter for SiN Photonic Integrated Circuits

Journal of Sensor and Actuator Networks
Optical phase modulation is essential for a wide range of silicon photonic integrated circuits used in communication applications. In this study, an optical phase shifter utilizing photo-elastic effects is proposed, where mechanical stress is induced by ...
Seyedfakhreddin Nabavi, Michaël Ménard, Frederic Nabki   +2 more
doaj   +1 more source

Antifungal and Photocatalytic Activities of ZnO Nanoparticles using Phyllanthus Emblica Leaf Extract [PDF]

Nanochemistry Research
To generate zinc oxide nanoparticles, we report a straight forward combination reaction between zinc nitrate and Phyllanthus emblica leaf extract. The synthesized nanoparticles were subjected to morphological, optical, and structural studies. We utilized
Anbuvannan Mari, Maria Vinosel Vincent, Ramesh Mookkaiah, Dhatshanamurthi Pachiyappan, Uvarajan Sambath   +4 more
doaj   +1 more source

FORTE Measurements of Global Optical Lightning Waveforms and Implications for Optical Lightning Detection

Earth and Space Science, 2022
Lightning processes generate a diverse collection of optical pulses from current traversing the lightning channels. These signals are then broadened spatially and temporally via scattering in the clouds.
Michael Peterson
doaj   +1 more source

Retrospective Analysis of Donor Lymphocyte Infusions in Pediatric Patients With Mixed Chimerism After Hematopoietic Stem Cell Transplantation

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Background Allogeneic hematopoietic stem cell transplantation (alloHSCT) is an essential therapy for several malignant and nonmalignant diseases, but relapse and graft loss remain the principal threats to its success. Routine monitoring of chimerism and minimal residual disease (MRD) enables early detection of imminent recurrence and guides ...
Carmen Junk, Sebastian Michaelis, Michaela Döring, Thomas Eichholz, Ursula Holzer, Martin Ebinger, Tim Flaadt, Rupert Handgretinger, Peter Lang, Jan Frederic Weller, Markus Mezger   +10 more
wiley   +1 more source