Results 21 to 30 of about 1,045,091 (343)

Deuterium abundances

open access: yesNew Astronomy, 1999
19 pages, 1 figure. To appear in New Astronomy, for the David N.
Jean Audouze   +12 more
openaire   +2 more sources

Abundance for Kähler threefolds [PDF]

open access: yesAnnales scientifiques de l'École normale supérieure, 2016
52 pages, modified exposition according to changes in arXiv preprint 1304 ...
Campana, Frédéric   +2 more
openaire   +7 more sources

Diversity and abundance of diatoms (Bacillariophyceae) in sediments of the south coast of Iran [PDF]

open access: yesبوم‌شناسی آبزیان, 2018
In this stud, the diversity and abundance of benthic diatoms were evaluated in 9 stations located in Persian Gulf (Sirik) and Oman Sea (Gwatar, Abshirinkon) in winter and spring of 1394 -1395.
Gilan Attaran Fariman   +2 more
doaj  

Abundance and abundance change in the world's parrots [PDF]

open access: yesIbis, 2015
Estimates of population density and abundance change (differences in density or encounter rates across land uses or time periods) form the cornerstone of much of our knowledge of species' responses to environmental conditions, extinction risks and potential conservation actions. Gathering baseline data on abundance of the world's c. 10 000 bird species
Kay Royle, Stuart J. Marsden
openaire   +2 more sources

Impact of crop management systems on soil nematode communities in South Brazil

open access: yesScientia Agricola, 2021
The analysis of nematode communities allows inferring consequences of management practices on the soil food web. We studied the taxonomic structure of nematode communities in preserved areas of the Atlantic forest (native forest = NF) in Ponta Grossa ...
Andressa Cristina Zamboni Machado   +4 more
doaj   +1 more source

Interpretation of Abundance Ratios [PDF]

open access: yesPublications of the Astronomical Society of Australia, 2005
In this paper we discuss abundance ratios and their relation to stellar nucleosynthesis and other parameters of chemical evolution models, reviewing and clarifying the correct use of the observed abundance ratios in several astrophysical contests. In particular, we start from the well known fact that abundance ratios depend on stellar yields, initial ...
MATTEUCCI, MARIA FRANCESCA, CHIAPPINI C.
openaire   +4 more sources

Externalities, scarcity, and abundance

open access: yesFrontiers 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   +3 more sources

Planetary Nebulae: Abundances and Abundance Gradients [PDF]

open access: yes, 2000
In this work, a review is given of some recent results and problems involved in the determination of chemical abundances of galactic planetary nebulae, particularly regarding disk and bulge objects.
openaire   +3 more sources

An abundance theorem for generalised pairs [PDF]

open access: yesarXiv, 2021
We prove the finiteness of $B$-representations of generalised log canonical pairs. As a consequence, we prove that, the (relative) abundance for a generalised semi-log canonical pair is implied by the abundance for its normalisation. Furthermore, we obtain an abundance theorem for generalised dlt pairs with abundant data, which is a natural inductive ...
arxiv  

A pedagogy of abundance

open access: yesRevista Española de Pedagogía, 2023
The digitalisation of content combined with a global network for delivery and an open system for sharing has seen radical changes in many industries. The economic model which has underpinned many content based industries has been based on an assumption of scarcity.
openaire   +2 more sources

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