Institution
National University of La Plata
Education•La Plata, Argentina•
About: National University of La Plata is a education organization based out in La Plata, Argentina. It is known for research contribution in the topics: Population & Stars. The organization has 12993 authors who have published 30013 publications receiving 495118 citations. The organization is also known as: UNLP & Universidad Nacional de La Plata.
Papers published on a yearly basis
Papers
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University of Edinburgh1, Columbia University2, American Museum of Natural History3, Universidade Federal do Rio Grande do Sul4, New York Institute of Technology College of Osteopathic Medicine5, Natural History Museum6, National University of La Plata7, University of Bristol8, University of Oviedo9, Staatliches Museum für Naturkunde Stuttgart10
TL;DR: It is hypothesized that trophic specialisation enabled these two large-bodied species to coexist in the same ecosystem and is supported by Plesiosuchus manselii having a very large optimum gape, while Dakosaurus maximus possesses craniomandibular characteristics observed in extant suction-feeding odontocetes.
Abstract: Background
Dakosaurus and Plesiosuchus are characteristic genera of aquatic, large-bodied, macrophagous metriorhynchid crocodylomorphs. Recent studies show that these genera were apex predators in marine ecosystems during the latter part of the Late Jurassic, with robust skulls and strong bite forces optimized for feeding on large prey.
Methodology/Principal Findings
Here we present comprehensive osteological descriptions and systematic revisions of the type species of both genera, and in doing so we resurrect the genus Plesiosuchus for the species Dakosaurus manselii. Both species are diagnosed with numerous autapomorphies. Dakosaurus maximus has premaxillary ‘lateral plates’; strongly ornamented maxillae; macroziphodont dentition; tightly fitting tooth-to-tooth occlusion; and extensive macrowear on the mesial and distal margins. Plesiosuchus manselii is distinct in having: non-amblygnathous rostrum; long mandibular symphysis; microziphodont teeth; tooth-crown apices that lack spalled surfaces or breaks; and no evidence for occlusal wear facets. Our phylogenetic analysis finds Dakosaurus maximus to be the sister taxon of the South American Dakosaurus andiniensis, and Plesiosuchus manselii in a polytomy at the base of Geosaurini (the subclade of macrophagous metriorhynchids that includes Dakosaurus, Geosaurus and Torvoneustes).
Conclusions/Significance
The sympatry of Dakosaurus and Plesiosuchus is curiously similar to North Atlantic killer whales, which have one larger ‘type’ that lacks tooth-crown breakage being sympatric with a smaller ‘type’ that has extensive crown breakage. Assuming this morphofunctional complex is indicative of diet, then Plesiosuchus would be a specialist feeding on other marine reptiles while Dakosaurus would be a generalist and possible suction-feeder. This hypothesis is supported by Plesiosuchus manselii having a very large optimum gape (gape at which multiple teeth come into contact with a prey-item), while Dakosaurus maximus possesses craniomandibular characteristics observed in extant suction-feeding odontocetes: shortened tooth-row, amblygnathous rostrum and a very short mandibular symphysis. We hypothesise that trophic specialisation enabled these two large-bodied species to coexist in the same ecosystem.
103 citations
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TL;DR: This is the first report to reveal an adult ADHD-specific impairment in the cortical modulation of emotion for faces and an association between N170 cortical measures and ToM and EF.
Abstract: Although it has been shown that adults with attention-deficit hyperactivity disorder (ADHD) have impaired social cognition, no previous study has reported the brain correlates of face valence processing. This study looked for behavioral, neuropsychological, and electrophysiological markers of emotion processing for faces (N170) in adult ADHD compared to controls matched by age, gender, educational level, and handedness. We designed an event-related potential (ERP) study based on a dual valence task (DVT), in which faces and words were presented to test the effects of stimulus type (faces, words, or face-word stimuli) and valence (positive versus negative). Individual signatures of cognitive functioning in participants with ADHD and controls were assessed with a comprehensive neuropsychological evaluation, including executive functioning (EF) and theory of mind (ToM). Compared to controls, the adult ADHD group showed deficits in N170 emotion modulation for facial stimuli. These N170 impairments were observed in the absence of any deficit in facial structural processing, suggesting a specific ADHD impairment in early facial emotion modulation. The cortical current density mapping of N170 yielded a main neural source of N170 at posterior section of fusiform gyrus (maximum at left hemisphere for words and right hemisphere for faces and simultaneous stimuli). Neural generators of N170 (fusiform gyrus) were reduced in ADHD. In those patients, N170 emotion processing was associated with performance on an emotional inference ToM task, and N170 from simultaneous stimuli was associated with EF, especially working memory. This is the first report to reveal an adult ADHD-specific impairment in the cortical modulation of emotion for faces and an association between N170 cortical measures and ToM and EF.
103 citations
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TL;DR: In this paper, a search for heavy resonances decaying into a pair of bosons leading to the final states, where $$\ell $$¯¯ stands for either an electron or a muon, is presented.
Abstract: A search for heavy resonances decaying into a pair of $$Z$$
bosons leading to $$\ell ^+\ell ^-\ell ^+\ell ^-$$
and $$\ell ^+\ell ^-
u \bar{
u }$$
final states, where $$\ell $$
stands for either an electron or a muon, is presented. The search uses proton–proton collision data at a centre-of-mass energy of 13
$$\text {TeV}$$
corresponding to an integrated luminosity of 36.1
$$\hbox {fb}^{-1}$$
collected with the ATLAS detector during 2015 and 2016 at the Large Hadron Collider. Different mass ranges for the hypothetical resonances are considered, depending on the final state and model. The different ranges span between 200 and 2000
$$\text {GeV}$$
. The results are interpreted as upper limits on the production cross section of a spin-0 or spin-2 resonance. The upper limits for the spin-0 resonance are translated to exclusion contours in the context of Type-I and Type-II two-Higgs-doublet models, while those for the spin-2 resonance are used to constrain the Randall–Sundrum model with an extra dimension giving rise to spin-2 graviton excitations.
103 citations
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TL;DR: In this paper, Sandstone petrography, geochemistry (major, trace, and rare earth elements [REE]), and Nd isotopic composition are presented for the siliciclastic Lower Caradoc Pavon Formation of the San Rafael block, central west Argentina.
103 citations
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TL;DR: In this article, a topological analysis of two model systems in which different CH O hydrogen bonds exist is performed in order to characterize them, and it is found that it is necessary to analyze the topological properties of the acceptor atom involved in the hydrogen bond since several parameters are qualitatively different in both complexes.
Abstract: A topological analysis of two model systems in which different CH…O hydrogen bonds exist is performed in order to characterize them. It is found that it is necessary to analyze the topological properties of the acceptor atom involved in the hydrogen bond since several parameters are qualitatively different in both complexes. This behaviour seems to suggest a way of identifying these bonds.
103 citations
Authors
Showing all 13198 results
Name | H-index | Papers | Citations |
---|---|---|---|
David Cameron | 154 | 1586 | 126067 |
Subir Sarkar | 149 | 1542 | 144614 |
Mayda Velasco | 137 | 1309 | 87579 |
Diego F. Torres | 137 | 948 | 72180 |
Heidi Sandaker | 128 | 999 | 76517 |
Vincent Garonne | 128 | 921 | 76980 |
Farid Ould-Saada | 128 | 931 | 76394 |
Ole Røhne | 128 | 1038 | 75752 |
Peter Hansen | 128 | 1271 | 86210 |
Maria-Teresa Dova | 127 | 778 | 73558 |
Vladimir Sulin | 127 | 884 | 75329 |
Andrei Snesarev | 127 | 875 | 74907 |
James Catmore | 127 | 892 | 75086 |
Ruslan Mashinistov | 126 | 860 | 73897 |
Fernando Monticelli | 126 | 843 | 73385 |