Sentence examples for rapid variability from inspiring English sources

We are developing fast photon-counter instruments to study the rapid variability of astrophysical sources by time tagging photon arrival times with unprecedented accuracy, making use of a Rubidium clock and GPS receiver.

Variations in the X-ray emission are related to changes in the UV seed photons, but it appears there must also be a mechanism - perhaps that which heats the Comptonizing corona - that induces rapid variability intrinsic to the X-rays.

The RXTE data confirm the strong absorption corresponding to the optical depth to electron scattering of about 2, but also reveal rapid variability of the hard (8 – 30 keV) X-ray emission on a time scale of a day or less.

CRP offers a reliable clinical information on the active inflammatory status due to its rapid variability [ 4, 5].

While low copy number could be related to low transposition rates, mechanisms like high mutation rate [ 78], recombination [ 79] and nested insertions [ 80], create rapid variability in TEs that results in divergence among TEs, and therefore, a low number of similar sequences.

A major problem impeding the development of an effective HIV-1 vaccine is the rapid antigenic variability that occurs throughout the viral genome but is most pronounced in the envelope (env) gene and env gene products.

This time-dependent model reproduces the main features of the rapid multi-wavelength variability of XTE J1118+480.

Some aspects of the rapid X-ray variability of low magnetic-field neutron stars in low-mass X-ray binaries are briefly summarized.

Genetic variability, rapid establishment of a reservoir of latently-infected long-lived CD4+ T cells and resistance to neutralization by antibodies are formidable obstacles to the development of a preventive vaccine.

This includes presenting a conceptual framework to link the emerging threats of climate change and variability, rapid urbanization and population growth, energy constraint and tightening environmental regulation through to their consequences on social, economic and environmental recipients.

The great similarities between the neutron star systems and the black-hole candidates at low mass accretion rates also point towards a similar origin of their timing phenomena indicating that the presence or absence of a solid surface, a magnetic field, or an event horizon do not play a significant role in the production mechanisms for the rapid X-ray variability.