Sentences with phrase «magnetic activity levels»

Similar flare rates were calculated by Maehara et al. 15 and Shibayama et al. 16 using rotation instead of chromospheric emission as the criterion for selecting Sun - like stars with magnetic activity levels similar to the Sun.

To track the magnetic activity levels of stars over time, the team observed stellar X-ray emissions collected by NASA's Chandra X-ray Observatory, and ESA's XMM - Newton satellite.

Not exact matches

The Sun's activity — including changes in the number of sunspots, levels of radiation and ejection of material - varies on an eleven - year cycle, driven by changes in its magnetic field.

But careful analysis of the volunteers» eye movements, combined with measurements of brain activity using functional magnetic resonance imaging, revealed that the hippocampus was often retrieving memories even if these recollections didn't make it to the level of consciousness.

To examine the link, researchers measured blood glucose levels and hunger, while also using functional magnetic resonance imaging (MRI) to observe brain activity during the crucial four - hour period after a meal, which influences eating behavior at the next meal.

The level of activity of these magnetic fields is constantly shifting in a way that varies from one star to another.

But they also show a lot of magnetic activity, causing high levels of X-rays and ultraviolet light to be produced which might completely evaporate the planets» atmospheres.

The research made use of functional magnetic resonance imaging (fMRI)-- which measures changes in the blood oxygen levels in the brain — and also multivariate analysis when comparing the brain activity of different viewers.

Level of sustained entorhinal activity at study correlates with subsequent cued - recall performance: a functional magnetic resonance imaging study with high acquisition rate.

Researchers at the Lifelong Brain and Cognition Lab at the Beckman Institute for Advanced Science and Technology at the University of Illinois have utilized the magnetic resonance imaging (MRI) facilities available in Beckman's Biomedical Imaging Center to measure the moment - to - moment variability in brain activity, more specifically in the blood oxygenation level - dependent (BOLD) signal.

The big problem is to explain a lag of more than 30 years when direct measurements of quantities (galactic cosmic rays, 10.7 cm solar radio, magnetic index, level of sunspot numbers, solar cycle lengths) do not indicate any trend in the solar activity since the 1950s.

During their early life, Sun - like stars spin very fast, creating extremely high levels of magnetic activity that drive powerful stellar flares, coronal mass ejections, and an outpouring of X-ray and ultraviolet radiation.

Add into the mix the fact that M - dwarfs can maintain high levels of magnetic activity for billions of years.

One manifestation of this activity that has become an important research tool is spontaneous fluctuations in the blood oxygen level - dependent (BOLD) signal of functional magnetic resonance imaging (fMRI).

The coronal magnetic reconnection hypothesis can explain the observations via the notion that superflares and solar flares share the same origin and that the two activity distributions therefore are within similar range, but that superflares mainly take place on stars with activity levels larger than the Sun.

We find during the past 11,400 years the Sun spent only of the order of 10 % of the time at a similar high level of magnetic activity and almost all of the earlier high - activity periods were shorter than the present episode.»

Svensmark claims that, in his model, temperature changes correlate better with cosmic - ray levels and solar magnetic activity than with other greenhouse factors.

In the almost sure knowledge that the earth never experienced a runaway greenhouse even with ancient CO2 levels 10 to 20 times greater than today, these anti-science scoundrels insist with a «high level of confidence» that this amplification is real and it's based on nothing more than faster than expected surface temperature rise in the past few decades which can be TOTALLY explained by multi-decadal cyclic behavior in ocean currents, trade winds, and / or solar magnetic activity causing small global average albedo changes.