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| http://dx.doi.org/10.1098/rsta.2023.0212 | DOI Listing |
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Deciphering the Instability of the Black Hole Ringdown Quasinormal Spectrum.
Phys Rev Lett
November 2024
Department of Theoretical Physics and Gravitational Wave Science Center, 24 quai Ernest Ansermet, CH-1211 Geneva 4, Switzerland.
The spectrum of the quasinormal modes of the gravitational waves emitted during the ringdown phase following the merger of two black holes is of primary importance in gravitational astronomy. However, the spectrum is extremely sensitive to small disturbances of the system, thus potentially jeopardizing the predictions of the gravitational-wave observables. We offer an analytical and intuitive explanation of such an instability and its properties based on the transfer matrix approach of quantum mechanics.
View Article and Find Full Text PDFStatic and dynamic balance in children in the context of school readiness.
J Bodyw Mov Ther
October 2024
Józef Piłsudski University of Physical Education in Warsaw, Faculty of Physical Education, Department of Biomedical Sciences, Poland. Electronic address:
Background: School readiness is the ability to perform coordinated motor tasks that are used in the activities of daily living in the context of starting compulsory education. It covers areas such as physical, sensorimotor, cognitive, emotional, and social development.
Objective: The aim of this study is to evaluate the level of balance in children preparing to start school based on selected clinical observation tests of sensory integration.
Naringenin can Inhibit the Pyroptosis of Osteoblasts by Activating the Nrf2/HO-1 Signaling Pathway and Alleviate the Differentiation Disorder of Osteoblasts Caused by Microgravity.
J Agric Food Chem
November 2024
Department of Orthopaedics, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, China.
Naringenin (4,5,7-trihydroxyflavone, NAR) is an effective active ingredient in , which has many biological functions, encompassing anti-inflammatory and -oxidant functions. Prior research has shown that NOD-like receptor pyrin domain-containing protein 3 (NLRP3) inflammasomes possessed a significant contribution to osteoporosis. However, the NAR impact on bone loss caused by microgravity remains unclear.
View Article and Find Full Text PDFA Gravitational-like Relationship of Dispersion Interactions is Exhibited by 40 Pairs of Molecules and Noble Gas Atoms.
J Am Chem Soc
November 2024
Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel.
We present computational results of many-body dispersion (MBD) interactions for 40 pairs of molecular and atomic species: hydrocarbons, silanes, corresponding fluorinated derivatives, pairs which have multiple H---H contacts between the molecules, as well as pairs having π-π interactions, and pairs of noble gases. The calculations reveal that the MBD stabilization energy () obeys a global relationship, which is . It is proportional to the product of the masses of the two molecules () and inversely proportional to the corresponding distances between the molecular centers-of-mass () or the H---H distances of the atoms mediating the interactions of the two molecules ().
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