Results 61 to 70 of about 738 (163)

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

Small 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, Steven N. Remiëns, Ethan I. L. Jull, Ivo R. Vermaire, Lisa Tran   +4 more
wiley   +1 more source

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

Annalen 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

The many flavours of photometric redshifts

, 2018
International audienceSince more than 70 years ago, the colours of galaxies derived from flux measurements at different wavelengths have been used to estimate their cosmological distances.
Olivier Ilbert, Ilbert, O., Hoyle, Ben, Mara Salvato, Ben Hoyle, Hoyle, B., Salvato, M., Salvato, Mara, Ilbert, Olivier   +8 more
core   +1 more source

Cosmology with Gravitational Waves: A Review

Annalen 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, Christos Karathanasis, Jonathan Gair, Gregory Ashton, Stefano Rinaldi, Hsiang‐Yu Huang, Gergely Dálya   +6 more
wiley   +1 more source

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

Statistical 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, David A. van Dyk, Roberto Trotta, David C. Stenning   +3 more
wiley   +1 more source

Frequency and properties of bars in cluster and field galaxies at intermediate redshifts [PDF]

, 2009
International audienceWe present a study of large-scale bars in field and cluster environments out to redshifts of ~0.8 using a final sample of 945 moderately inclined disk galaxies drawn from the EDisCS project.
G. Rudnick, Clowe, D., B. Milvang-Jensen, Dalcanton, J., Dalcanton, J. J., Barazza, F., Simard, L., F. D. Barazza, R. Pelló, Clowe, D. I., D. Zaritsky, J. J. Dalcanton, Noll, S., White, S. D. M., L. Simard, Poggianti, B. M., Pelló, R., Saglia, R. P., Barazza, F. D., Rudnick, G., Aragón-Salamanca, A., V. Desai, S. Jogee, R. P. Saglia, B. M. Poggianti, Arag\uf3n-Salamanca, A., Milvang-Jensen, Bo, Milvang-Jensen, B., Zaritsky, D., Barazza...[et al.], F. D., Pell\uf3, R., Poggianti, B., de Lucia, G., Jablonka, P., S. Noll, Saglia, R., Halliday, C., S. D. M. White, P. Jablonka, A. Aragón-Salamanca, Desai, V., Jogee, S., White, S., C. Halliday, D. I. Clowe, G. De Lucia   +45 more
core   +1 more source

EIGER I. a large sample of [OIII]-emitting galaxies at $5.3 < z < 6.9$ and direct evidence for local reionization by galaxies

, 2022
We present a first sample of 117 [OIII]$\lambda\lambda$4960,5008-selected star-forming galaxies at $5.33 < z < 6.93$ detected in JWST/NIRCam 3.5$\mu$m slitless spectroscopy of a $6.5 \times 3.4$ arcmin$^2$ field centered on the hyperluminous quasar SDSS ...
Lilly, Simon, Kashino, Daichi, Lilly, Simon J., Mackenzie, Ruari, Jorryt Matthee, Rongmon Bordoloi, Simon J. Lilly, Eilers, Anna-Christina, Ruari Mackenzie, Robert A. Simcoe, Bordoloi, Rongmon, Matthee, Jorryt, Simcoe, Robert A., Anna-Christina Eilers, Daichi Kashino   +14 more
core   +1 more source

New Derivation of Redshift Distance Without Using Power Expansions. II. Additional Redshift Distances, Analyzing the Data of More Quasars, of Some SNIa, of the One Black Hole in Galaxy M87 as Well as a Newer Estimation of H₀

, 2022
In this part of the two-part series of essays, we first derive some equations for further physical redshift distances. We then analyze a catalog with 132,975 quasars, for which both the apparent magnitude m and the redshift z are given, in order to find the today&rsquo;s value of the parameter &beta;0 of the theory presented.
openaire   +2 more sources

Inkjet Printed Photonic Cellulose Nanocrystal Patterns

Advanced Materials, Volume 36, Issue 1, January 4, 2024.
Patterned arrays of photonic cellulose nanocrystal microfilms are prepared by inkjet printing. By dispensing directly through an oil layer, the printing and drying processes can be decoupled, which avoids the coffee stain effect and enables complex arrays to be produced.
Cyan A. Williams, Richard M. Parker, Andrew Kyriacou, Maria Murace, Silvia Vignolini   +4 more
wiley   +1 more source

Estimation of redshifts from early galaxies

, 2007
Dating early galaxies is a current technical, empirical and theoretical problem. Progress has been made recently calculating these dates using the observed redshift, z, alone.
Smith, M.L., Öztaş, A.M., Paul, Jan
core