Results 11 to 20 of about 172,789 (120)

Estimates for the number of visible galaxy-spanning civilizations and the cosmological expansion of life [PDF]

open access: yes, 2016
If advanced civilizations appear in the universe with an ability and desire to expand, the entire universe can become saturated with life on a short timescale, even if such expanders appear rarely.
Olson, S. Jay
core   +3 more sources

Gravitational Interactions of Finite Thickness Global Topological Defects with Black Holes

open access: yes, 2018
It is well known that global topological defects induce a repulsive gravitational potential for test particles. 'What is the gravitational potential induced by black holes with a cosmological constant (Schwarzschild-de Sitter (S-dS) metric) on finite ...
Perivolaropoulos, L.
core   +1 more source

Formation of Supermassive Black Holes by Direct Collapse in Pregalactic Halos

open access: yes, 2006
We describe a mechanism by which supermassive black holes can form directly in the nuclei of protogalaxies, without the need for seed black holes left over from early star formation.
Begelman, Mitchell C.   +2 more
core   +1 more source

The ACS LCID project. IX. Imprints of the early Universe in the radial variation of the star formation history of dwarf galaxies [PDF]

open access: yes, 2013
Based on Hubble Space Telescope observations from the Local Cosmology from Isolated Dwarfs project, we present the star formation histories, as a function of galactocentric radius, of four isolated Local Group dwarf galaxies: two dSph galaxies, Cetus and
Aparicio, Antonio   +10 more
core   +2 more sources

A statistical method to estimate low-energy hadronic cross sections [PDF]

open access: yes, 2016
In this article we propose a model based on the Statistical Bootstrap approach to estimate the cross sections of different hadronic reactions up to a few GeV in c.m.s energy.
Chongli Zhong (1436026)   +5 more
core   +9 more sources

Reduced fecundity associated with Wolbachia infection in a Neotropical drosophilid Redução da fecundidade associada à infecção por Wolbachia em um drosofilídeo Neotropical

open access: yesEcological Entomology, Volume 51, Issue 3, Page 475-488, June 2026.
Using multiple infected and uninfected Drosophila sturtevanti lines, we investigated (i) the impact of Wolbachia on fecundity and (ii) its effects relative to antibiotic treatment. Based on over 1680 dissected ovaries, fecundity was similar between infected and uninfected flies.
Letícia Carlesso de Paula Sena   +4 more
wiley   +1 more source

Temporal description logic for ontology-based data access [PDF]

open access: yes, 2013
Our aim is to investigate ontology-based data access over temporal data with validity time and ontologies capable of temporal conceptual modelling. To this end, we design a temporal description logic, TQL, that extends the standard ontology language ...
Artale, A.   +3 more
core   +1 more source

Quenching of high-pT hadrons: Energy Loss vs Color Transparency

open access: yes, 2012
High-pT hadrons produced in hard collisions and detected inclusively bear peculiar features: (i) they originate from jets whose initial virtuality and energy are of the same order; (ii) such jets are rare and have a very biased energy sharing among the ...
B. G. Zakharov   +12 more
core   +1 more source

Using miniaturized laboratory equipment and DNA barcoding to improve conservation genetics training and identify illegally traded species

open access: yesConservation Biology, Volume 40, Issue 2, April 2026.
Abstract Illegal wildlife trade (IWT) is one of the largest global illegal activities, and it negatively affects biodiversity and sustainable development worldwide. DNA barcoding coupled with high‐throughput sequencing (i.e., metabarcoding) is useful in identifying taxa affected by IWT and has been used routinely for decades.
Maria Joana Ferreira da Silva   +9 more
wiley   +1 more source

Allosteric Modulation of Pathological Ataxin‐3 Aggregation: A Path to Spinocerebellar Ataxia Type‐3 Therapies

open access: yesAdvanced Science, Volume 13, Issue 11, 23 February 2026.
This study uncovers a new allosteric site in the Josephin domain of ataxin‐3 targeted by the molecular tweezer CLR01, which modulates protein aggregation, improves synaptic function in neuronal cells, and delays motor dysfunction in animal models.
Alexandra Silva   +28 more
wiley   +1 more source

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