Results 21 to 30 of about 8,586,817 (317)

Probing Pulsar Winds Using Inverse Compton Scattering [PDF]

open access: yes, 1999
We investigate the effects of inverse Compton scattering by electrons and positrons in the unshocked winds of rotationally-powered binary pulsars. This process can scatter low energy target photons to produce gamma rays with energies from MeV to TeV. The
Aschenbach   +29 more
core   +3 more sources

Muscle Force-Velocity Relationships Observed in Four Different Functional Tests

open access: yesJournal of Human Kinetics, 2017
The aims of the present study were to investigate the shape and strength of the force-velocity relationships observed in different functional movement tests and explore the parameters depicting force, velocity and power producing capacities of the tested
Milena Živković   +4 more
semanticscholar   +1 more source

Improved side-chain torsion potentials for the Amber ff99SB protein force field

open access: yesProteins: Structure, Function, and Bioinformatics, 2010
Recent advances in hardware and software have enabled increasingly long molecular dynamics (MD) simulations of biomolecules, exposing certain limitations in the accuracy of the force fields used for such simulations and spurring efforts to refine these ...
K. Lindorff-Larsen   +6 more
semanticscholar   +1 more source

Coulomb field of an accelerated charge: physical and mathematical aspects [PDF]

open access: yes, 1991
The Maxwell field equations relative to a uniformly accelerated frame, and the variational principle from which they are obtained, are formulated in terms of the technique of geometrical gauge invariant potentials.
C Teitelboim   +28 more
core   +2 more sources

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Solution of Supplee's submarine paradox through special and general relativity

open access: yes, 2016
In 1989 Supplee described an apparent relativistic paradox on which a submarine seems to sink to observers at rest within the ocean, but it rather seems to float in the submarine proper frame. In this letter, we show that the paradox arises from a misuse
Vieira, R. S.
core   +1 more source

Mass loss by a scalar charge in an expanding universe [PDF]

open access: yes, 2002
We study the phenomenon of mass loss by a scalar charge -- a point particle that acts a source for a noninteracting scalar field -- in an expanding universe.
A.S. Eddington   +13 more
core   +2 more sources

Moving in the Dark: Enlightening the Spatial Population Ecology of European Cave Salamanders

open access: yesPopulation Ecology, EarlyView.
We assessed individual interactions, movement ecology and activity patterns of a subterranean population of Speleomantes strinatii, applying spatial capture–recapture modeling to a photographic dataset of 104 individuals. ABSTRACT Space use and movement are fundamental aspects of organisms' ecology, mirroring individual fitness, behavior, and life ...
Giacomo Rosa   +2 more
wiley   +1 more source

Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors

open access: yesPopulation Ecology, EarlyView.
Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley   +1 more source

Unified field equations coupling four forces and principle of interaction dynamics

open access: yesDiscrete & Continuous Dynamical Systems - A, 2015
revision after taking consideration of referee's ...
Shouhong Wang, Tian Ma
openaire   +4 more sources

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