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23 results for “optical density”
Reproduction package for the publication 'New radiative loss curve from updates to collisional excitation in the low-density, optically thin plasmas in SPEX'
<p>The following files can be used to reproduce the Figures and data from the paper <strong>New radiative loss curve from updates to collisional excitation in the low-density, optically thin plasmas in SPEX </strong>by L. Štofanová, J. Kaastra, M. Mehdipour, and J. de Plaa accepted to be publish in Section 12. Atomic, molecular, and nuclear data of Astronomy and Astrophysics (acceptance date - 27/06/2021).</p> <p> </p> <p>Note: version 2 is the most updated version (change in Fig.7).</p>
O2-O2, SO2, BrO, and IO differential slant column densities (dSCDs) measured by the University of Colorado Multi-AXis Differential Optical Absorption Spectroscopy (CU MAX-DOAS) instrument at Maido Observatory during April 29, 2018 and May 4, 2018
<p>Description: O<sub>2</sub>-O<sub>2</sub>, SO<sub>2</sub>, BrO, and IO differential slant column densities (dSCDs) measured by the University of Colorado Multi-AXis Differential Optical Absorption Spectroscopy (CU MAX-DOAS) instrument at Maido Observatory during April 29, 2018 and May 4, 2018.</p> <p>Instrument: University of Colorado Multi-AXis Differential Optical Absorption Spectroscopy (CU MAX-DOAS)<br> Instrument reference: Coburn et al. (2011); doi:10.5194/amt-4-2421-2011<br> Instrument contact: Christopher F. Lee (christopher.f.lee@colorado.edu)<br> Instrument PI: Rainer Volkamer (rainer.volkamer@colorado.edu)<br> <br> Measurement site: Maido Observatory, Reunion Island<br> Longitude: 55.384 degrees East<br> Latitude: 21.080 degrees South<br> Altitude: 2160 meters above sea level<br> Azimuth angle: Approximately 100 degrees clockwise from north<br> <br> The detection limit is defined as (2*Measured RMS) / (Maximum differential absorption cross section), where RMS = root-mean-square noise of spectral signal not accounted for by DOAS fit parameters [optical density units]. The maximum differential absorption cross sections used are 7.0e-21 [cm<sup>2</sup>] for SO<sub>2</sub>, 2.6e-17 [cm<sup>2</sup>] for BrO, and 3.5e-17 [cm<sup>2</sup>] for IO. Detection limits for SO<sub>2</sub> dSCDs, BrO dSCDs, and IO dSCDs are only reported during periods of significant SO<sub>2</sub> detection. BrO to SO<sub>2</sub> ratios are only reported during periods when both BrO dSCDs and SO<sub>2</sub> dSCDs are above the detection limit.</p> <p>Local time (RET) is UTC+4.<br> <br> Column 1: UTC start datetime (yyyy-mm-dd HH:MM:SS)<br> Column 2: UTC center datetime (yyyy-mm-dd HH:MM:SS)<br> Column 3: UTC stop datetime (yyyy-mm-dd HH:MM:SS)<br> Column 4: Elevation angle above the horizon (degrees)<br> Column 5: O<sub>2</sub>-O<sub>2</sub> dSCD [molec<sup>2</sup> cm<sup>-5</sup>]<br> Column 6: Spectral fit error for O<sub>2</sub>-O<sub>2</sub> dSCD [molec<sup>-2</sup> cm<sup>-5</sup>]<br> Column 7: SO<sub>2</sub> dSCD [molec cm<sup>-2</sup>]<br> Column 8: Spectral fit error for SO<sub>2</sub> dSCD [molec cm<sup>-2</sup>]<br> Column 9: Detection limit for SO<sub>2</sub> dSCD [molec cm<sup>-2</sup>]<br> Column 10: BrO dSCD [molec cm<sup>-2</sup>]<br> Column 11: Spectral fit error for BrO dSCD [molec cm<sup>-2</sup>]<br> Column 12: Detection limit for BrO dSCD [molec cm<sup>-2</sup>]<br> Column 13: IO dSCD [molec cm<sup>-2</sup>]<br> Column 14: Spectral fit error for IO dSCD [molec cm<sup>-2</sup>]<br> Column 15: Detection limit for IO dSCD [molec cm<sup>-2</sup>]<br> Column 16: Ratio of BrO dSCDs to SO<sub>2</sub> dSCDs<br> Column 17: Error in ratio of BrO dSCDs to SO<sub>2</sub> dSCDs</p>
Optical properties of monolayer and multilayer 1T' WTe2 calculated by density functional theory
<p>We investigate the optical properties of monolayer, bilayer, trilayer, and quadrilayer WTe<sub>2</sub> in the 1T' crystal phase by ab-initio calculations based on spin-polarized density functional theory (DFT). We used the Vasp package to calculate the real and imaginary part of the dielectric function, the real and imaginary part of the refractive index, as well as the optical absorbance from 0 eV to 5 eV and for different crystal directions.</p>
In vivo optimization of the experimental conditions for the non-invasive optical assessment of breast density
<p>We applied time-domain diffuse optical spectroscopy over a broad spectral range (600-1100 nm) to estimate the breast composition in terms of water, lipids, collagen, oxy- and deoxy-hemoglobin concentrations, together with scattering parameters (scattering amplitude <em>a</em> and scattering power <em>b</em>). These optical parameters are correlated with the density of the breast, which is an important risk factor involved in the development of breast cancer. We performed <em>in vivo </em>measurement on 11 healthy volunteers, using a measurement protocol that involves reflectance and transmittance geometries, different positions of the subject and different measurement locations on the breast. This work has been pubblished in Scientific Reports: https://doi.org/10.1038/s41598-024-70099-x .</p> <p>This page contains the dataset generated during this work, togheter with some tools to read it and the analysis that we performed.</p>
Replication Data for: OPTICAL COHERENCE TOMOGRAPHY IDENTIFIES LOWER LABIAL SALIVARY GLAND SURFACE DENSITY IN CYSTIC FIBROSIS
<p>Swept-source optical coherence tomography images of the mucosa of the lower lip acquired in 18 cystic fibrosis patients (CF.zip, includes an XLS file with additional data) and 18 healthy volunteers (HS.zip). Within the volumetric datasets consisting of sets of images the labial salivary glands can be identified.</p> <p>Authors: Nowak JK, Grulkowski I, Karnowski K, Wojtkowski M, Walkowiak J.<br /> When using the data, please always refer to the original paper (currently under review in PLOS ONE; title as specified above).</p> <p>The methodology used to obtain the volumetric datasets is described in:<br /> Grulkowski I, Nowak JK, Karnowski K, Zebryk P, Puszczewicz M, Walkowiak J, Wojtkowski M. Quantitative assessment of oral mucosa and labial minor salivary glands in patients with Sjögren’s syndrome using swept source OCT. Biomedical Optics Express, Vol. 5, Issue 1, pp. 259-274 (2014). DOI: http://dx.doi.org/10.1364/BOE.5.000259</p>
Breast Study to Determine the Ability of Non-Invasive Optical Transillumination Spectroscopy to Predict Breast Density.
ClinicalTrials.gov study NCT00188682. IPD Sharing: Not stated. Countries: 1. Publications: 4.
Long Term Effects of Lutein/Zeaxanthin and Omega-3- Supplementation on Optical Density of AMD Patients (LUTEGA)
ClinicalTrials.gov study NCT00763659. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Relationships Between Macular Pigment Optical Density and Lacquer Cracks in High Myopic Patients.
ClinicalTrials.gov study NCT02205632. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Effects of Lutein Supplementation on Macular Pigment Optical Density and Visual Acuity in Patients With Age-related Macular Degeneration
ClinicalTrials.gov study NCT00879671. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Semi-manual Vessel Density Analysis on Optical Coherence Tomography Angiography Images of Healthy Adults
ClinicalTrials.gov study NCT03590899. IPD Sharing: NO. Countries: 1. Publications: 20.
Probing surface charge densities on optical fibers with a trapped ion
<p>We describe a novel method to measure the surface charge densities on optical fibers placed in the vicinity of a trapped ion, where the ion itself acts as the probe. Surface charges distort the trapping potential, and when the fibers are displaced, the ion’s equilibrium position and secular motional frequencies are altered. We measure the latter quantities for different positions of the fibers and compare these measurements to simulations in which unknown charge densities on the fibers are adjustable parameters. Values ranging from −10 to +50 e/µm2 were determined. Our results will benefit the design and simulation of miniaturized experimental systems combining ion traps and integrated optics, for example, in the fields of quantum computation, communication and metrology. Furthermore, our method can be applied to any setup in which a dielectric element can be displaced relative to a trapped charge-sensitive particle.</p>
OPTICAL DENSITY OF HUMIC ACIDS OF IRRIGATED SOILS OF BUKHARA OASIS
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Transcriptomic profiles of S. Typhimurium SL1344 parent strain and ΔdksA and ΔrelAΔspoTΔdksA mutant strains grown to various optical densities during late-log and stationary phase in LB aerobic batch
GEO Series GSE63713. Salmonella enterica subsp. enterica serovar Typhimurium str. DT104; Salmonella enterica subsp. enterica serovar Typhimurium str. LT2; Salmonella enterica subsp. enterica serovar Enteritidis; Salmonella enterica subsp. enterica serovar Gallinarum str. 287/91; Salmonella enterica subsp. enterica serovar Typhimurium str. SL1344. 30 samples. Type: Expression profiling by array.
Amniotic Fluid Optical Density Determination as a Test for Assessment of Fetal Lung Maturity.
ClinicalTrials.gov study NCT02332304. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Normative Database of Healthy Subject Vascular Density Using Spectralis Heidelberg® Optical Coherence Tomography Angiography
ClinicalTrials.gov study NCT06043622. IPD Sharing: NO. Countries: 1. Publications: 0.
Macular Pigment Optical Density in Healthy Subjects
ClinicalTrials.gov study NCT00993330. IPD Sharing: Not stated. Countries: 1. Publications: 0.
The Value of Measuring Retinal Vascular Density by Optical Coherence Tomography-Angiography (OCT-A) in Patients with Microvascular Angina Confirmed by Myocardial Microcirculatory Resistance Index (MRI
ClinicalTrials.gov study NCT06692751. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Development of a Quantitative Tissue Optical Index of Breast Density For Prediction of Hormone Therapy Response
ClinicalTrials.gov study NCT01773551. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Association of Macular Pigment Optical Density (MPOD) and Genetic Variants in Complement Factor H in Subjects With Choroidal Neovascular (CNV)
ClinicalTrials.gov study NCT01682382. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Effects of Xanthophylls on Optical Density
ClinicalTrials.gov study NCT01316198. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.