Results 31 to 40 of about 1,234,720 (380)

Topology in abundance [PDF]

Nature Reviews Physics, 2019
Invited News&Views piece for Nature Reviews Physics. Read-only edited version available through https://rdcu.be/bo6gh (v2: minor improvements and reference added)
Étienne Lantagne-Hurtubise, Marcel Franz   +1 more
openaire   +3 more sources

Non-LTE Abundances of Magnesium, Aluminum and Sulfur in OB Stars Near the Solar Circle [PDF]

, 2002
Non-LTE abundances of magnesium, aluminum and sulfur are derived for a sample of 23 low-v \sin i stars belonging to six northern OB associations of the Galactic disk within 1 kpc of the Sun.
Afflerbach, Andrievsky, Daflon, Daflon, Daflon, Deharveng, Dufton, Gies, Grevesse, Gummersbach, Heger, K. Butler, K. Cunha, McNamara, Mihalas, Przybilla, S. Daflon, Simpson, V. V. Smith, Vrancken, Vrancken, Vrancken   +21 more
core   +3 more sources

Nucleosynthesis Predictions and High-Precision Deuterium Measurements

Universe, 2017
Two new high-precision measurements of the deuterium abundance from absorbers along the line of sight to the quasar PKS1937–1009 were presented. The absorbers have lower neutral hydrogen column densities (N(HI) ≈ 18 cm − 2 ) than for previous ...
Signe Riemer-Sørensen, Espen Sem Jenssen   +1 more
doaj   +1 more source

Effect of population abundances on the stability of large random ecosystems. [PDF]

Physical Review E, 2017
Random matrix theory successfully connects the structure of interactions of large ecological communities to their ability to respond to perturbations.
Theo L. Gibbs, J. Grilli, T. Rogers, S. Allesina   +3 more
semanticscholar   +1 more source

Abundance

, 2021
This chapter defines what abundance is in ecology and neoclassical economics. It also gives an overview of key literature and developments on the research of abundance.
openaire   +2 more sources

Fe I and Fe II Abundances of Solar-Type Dwarfs in the Pleiades Open Cluster [PDF]

, 2010
We have derived Fe abundances of 16 solar-type Pleiades dwarfs by means of an equivalent width analysis of Fe I and Fe II lines in high-resolution spectra obtained with the Hobby - Eberly Telescope and High Resolution Spectrograph.
Adele L. Plunkett, Adele L. Plunkett, Jeremy R. King, Jeremy R. King, Marc H. Pinsonneault, Marc H. Pinsonneault, Simon C. Schuler, Simon C. Schuler   +7 more
core   +4 more sources

Calcareous Nannofossils Biostratigraphy of Late Cretaceous–Paleocene Successions from Northern Jordan and Their Implications for Basin Analysis

Geosciences, 2023
Local geological and tectonic processes have been pivotal in shaping the diverse sedimentation patterns observed in Jordan, forming sub-basins characterized by elevated organic matter content (TOC). This study aims to characterize the Maastrichtian basin,
Albesher Hussein, Osama M. Al-Tarawneh, Mohammad Alqudah   +2 more
doaj   +1 more source

ABUNDANCES, STELLAR PARAMETERS, AND SPECTRA FROM THE SDSS-III/APOGEE SURVEY [PDF]

, 2015
The SDSS-III/Apache Point Observatory Galactic Evolution Experiment (APOGEE) survey operated from 2011–2014 using the APOGEE spectrograph, which collects high-resolution (R ∼ 22,500), near-IR (1.51–1.70 μm) spectra with a multiplexing (300 fiber-fed ...
J. Holtzman, M. Shetrone, Jennifer A. Johnson, C. Prieto, F. Anders, B. Andrews, T. Beers, D. Bizyaev, M. Blanton, J. Bovy, R. Carrera, S. Chojnowski, K. Cunha, D. Eisenstein, D. Feuillet, P. Frinchaboy, J. Galbraith-Frew, A. G. Pérez, D. A. García-Hernández, S. Hasselquist, M. Hayden, F. Hearty, I. Ivans, S. Majewski, S. Martell, S. Mészáros, D. Muna, D. Nidever, D. Nguyen, R. O’Connell, K. Pan, M. Pinsonneault, A. Robin, R. Schiavon, N. Shane, J. Sobeck, V. Smith, N. Troup, D. Weinberg, John C. Wilson, W. M. Wood-Vasey, O. Zamora, G. Zasowski   +42 more
semanticscholar   +1 more source

Radial Gradients of Abundances [PDF]

Astrophysics and Space Science, 2002
We have computed a set of multiphase chemical evolution models in which the radial mass distribution of each theoretical galaxy is calculated using the Universal Rotation Curve from Persic, Salucci & Steel (1996). We obtain the chemical evolution for galaxies of different masses and morphological types by changing the efficiencies to form molecular
Mercedes Mollá, Angeles I. Díaz, F. Ferrini   +2 more
openaire   +4 more sources

Externalities, scarcity, and abundance

Frontiers in Research Metrics and Analytics, 2022
IntroductionDo externalities work and matter differently in a world of scarcity vs. a world of abundance? In this article, we critically examine the economic phenomena of externalities. The concept of externality, an important idea in economics and law, is useful in exploring the complex and dynamic relationships between resource supply and human ...
Frischmann, Brett M, Ramello, Giovanni B
openaire   +4 more sources