Results 41 to 50 of about 3,827 (167)

Flexible, Photonic Films of Surfactant‐Functionalized Cellulose Nanocrystals for Pressure and Humidity Sensing

open access: yesSmall Structures, Volume 5, Issue 7, July 2024.
Cellulose nanocrystals are abundant, biodegradable nanoparticles that can self‐assemble into a helical stacking that exhibits structural color. By adding a single surfactant, cellulose nanocrystals can be made compatible with apolar solvents, which are widely used for industrial coatings.
Diogo V. Saraiva   +4 more
wiley   +1 more source

High-redshift Lyman-α galaxies [PDF]

open access: yesProceedings of the International Astronomical Union, 2006
A strong Lyman-α line enables relatively easy detection of high redshift galaxies. Lyman-α galaxies are now known from z = 3 to 6.6. No evolution is discerned in the Lyman-α line luminosity function in this redshift range. This implies that the intergalactic medium at z = 6 is at least 50% ionized over more than 50% of the volume.
Sangeeta Malhotra, James E. Rhoads
openaire   +1 more source

Ultrasensitive and Visible Detection of Influenza A Virus Based on Enzymatic Properties of Layered Gold Nanoparticles

open access: yesSmall Structures, Volume 5, Issue 4, April 2024.
An ultrasensitive and visible detection for influenza A virus is presented by leveraging the properties of gold nanoparticles (GNPs). Dual amplification, achieved through a synthetic nanoprobe utilizing the enzymatic properties of layered GNPs, exhibits a higher sensitivity. This system is suitable for point‐of‐care tests within 55 min by verifying its
Eunji Jeong   +8 more
wiley   +1 more source

ALMA 1.1mm Observations of a Conservative Sample of High Redshift Massive Quiescent Galaxies in SHELA [PDF]

open access: green, 2023
Katherine Chworowsky   +13 more
openalex   +1 more source

Chemical Evolution of the Universe and its Consequences for Gravitational‐Wave Astrophysics

open access: yesAnnalen der Physik, Volume 536, Issue 2, February 2024.
Population properties of double compact object mergers (especially binary black holes) are sensitive to the metallicity dependent cosmic star formation history. The uncertainty of this quantity cannot be ignored and makes the interpretation of current gravitational wave observations difficult.
Martyna Chruślińska
wiley   +1 more source

Cosmology with Gravitational Waves: A Review

open access: yesAnnalen der Physik, Volume 536, Issue 2, February 2024.
The review gives an overview of the most recent advances in gravitational‐wave (GWs) cosmology. After an in‐depth discussion of methodologies and tools for GW cosmology, it presents the latest results on measurements of standard cosmological parameters from the LIGO, Virgo, and KAGRA detections.
Simone Mastrogiovanni   +6 more
wiley   +1 more source

A high-redshift calibration of the [OI]-to-HI conversion factor in star-forming galaxies [PDF]

open access: green, 2023
S. N. Wilson   +8 more
openalex   +1 more source

Stratified learning: A general‐purpose statistical method for improved learning under covariate shift

open access: yesStatistical Analysis and Data Mining: The ASA Data Science Journal, Volume 17, Issue 1, February 2024.
Abstract We propose a simple, statistically principled, and theoretically justified method to improve supervised learning when the training set is not representative, a situation known as covariate shift. We build upon a well‐established methodology in causal inference and show that the effects of covariate shift can be reduced or eliminated by ...
Maximilian Autenrieth   +3 more
wiley   +1 more source

Very High Redshift Radio Galaxies [PDF]

open access: yes, 1999
High redshift radio galaxies (HzRGs) provide unique targets for the study of the formation and evolution of massive galaxies and galaxy clusters at very high redshifts. We discuss how efficient HzRG samples are selected, the evidence for strong morphological evolution at near-infrared wavelengths, and for jet-induced star formation in the z=3.800 HzRG ...
van Breugel, Wil   +4 more
openaire   +2 more sources

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