Results 161 to 170 of about 1,975 (257)

Non-geodesic timelike observers and the ultralocal limit. [PDF]

open access: yesEur Phys J C Part Fields
Saadati R, Valsan L, Faraoni V.
europepmc   +1 more source

Feeding ecology of an Amazonian electric knifefish under altered flood‐pulse dynamics caused by hydroelectric damming

open access: yesJournal of Fish Biology, EarlyView.
Abstract This study evaluated the effects of the controlled flood pulse on diet composition, trophic niche breadth and feeding intensity of Archolaemus janeae, an electric knifefish species with a restricted distribution in the Amazon Basin. Monthly samples were collected from December 2020 to November 2021 in the Volta Grande stretch of the Xingu ...
Ana F. V. N. M. Costa   +8 more
wiley   +1 more source

The state of knowledge on four families of Syngnathoidei fishes (Teleostei: Syngnathiformes): Aulostomidae, Centriscidae, Fistulariidae and Solenostomidae

open access: yesJournal of Fish Biology, EarlyView.
Abstract Knowledge on the ecology and life‐history traits of coastal marine species is vital to inform their conservation and management, especially as their coastal habitats come under increasing threats. However, such data have never been collated for four of the five families in the suborder Syngnathoidei—the close relatives of the better‐studied ...
Syd J. Ascione   +3 more
wiley   +1 more source

Social media, high‐frequency trading, and market making after‐hours – Evidence from presidential tweets

open access: yesJournal of Financial Research, EarlyView.
Abstract I analyze differences between the core and extended trading sessions in the high‐frequency reaction of equity markets to potential news. Using presidential tweets as unanticipated, potentially market‐stirring events, I find that volatility increases and liquidity deteriorates within fractions of a second after a tweet.
Stefan Scharnowski
wiley   +1 more source

The Exact Vacuum Solution for Kasner Metric from Bianchi Type-I Cosmological Model

open access: yesInternational Journal of Computer Applications, 2020
A.H. Hasmani, Ahmed M.
openaire   +1 more source

Investor sentiment and stock market returns: A comparative analysis of mood, word, and trade

open access: yesJournal of Financial Research, EarlyView.
Abstract We examine and compare the return predictability of mood‐, word‐, and trade‐based sentiment measures across 18 international stock markets. Empirical results reveal that the trade‐based measure performs strongly across many settings; the word‐based measure contributes important complementary information, including in cases where the trade ...
Lan Xiang, Wenzhao Wang
wiley   +1 more source

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