Tag

Variability

All articles tagged with #variability

space15 days ago•5 min saved

Distant Black Hole Fades in a Human-Scale Timespan

Astronomers tracked galaxy J0218−0036 (about 10 billion light-years away) and found its central supermassive black hole dimmed by about 20x overall and ~50x in the active nucleus from the early 2000s to 2023. Dust obscuration was ruled out, pointing to an intrinsic drop in accretion with the Eddington ratio falling from ~0.4 to ~0.008. The observed e-folding timescale is roughly 2,000 days in the observed frame (~700 days rest frame), far faster than standard models predict, suggesting a change in accretion mode and challenging current black hole growth theories.

via Indian Defence Review|

#accretion #black-hole #galaxy

science1 year ago•4 min saved

Scientists Quantify Variability in Music from Bach to Jazz

Scientists at the Max Planck Institute for Dynamics and Self-Organization have quantitatively analyzed over 550 pieces of classical and jazz music to measure variability in musical compositions. They found that the predictability of music, based on the autocorrelation of pitches, decreases abruptly after a certain time, with jazz improvisations generally being less predictable than classical compositions. The study revealed that compositions by Bach have shorter transition times to unpredictability compared to those by Mozart, offering more variability and surprises.

via Phys.org|

#autocorrelation #classical #jazz

science2 years ago•5 min saved

"Unlocking the Science of Memory Retention: The Best Techniques Revealed"

New research suggests that incorporating spaced learning and variability into study materials can significantly enhance memory retention. Psychologists from Temple University and the University of Pittsburgh conducted experiments that revealed the benefits of spaced learning on memory, depending on the variability present in the content across repetitions and the timing between learning opportunities. The findings indicate that both variability and spacing may present methods to improve memory for isolated features and associative information, with potential applications for future research, education, and everyday life.

via SciTechDaily|

#learning-strategies #memory-retention #psychological-research

neuroscience2 years ago•6 min saved

"Maximizing Memory: Harnessing Variability and Spaced Learning"

A new study reveals that spaced learning enhances memory retention, particularly when the content varies between sessions, offering a more realistic reflection of real-world experiences. The research, funded by the U.S. National Science Foundation and the National Institutes of Health, suggests that the combination of variability and spacing in learning could significantly enhance memory retention, offering new insights for educational practices and memory research. The study contrasts the impact of learning identical content versus content with variations, across different timescales, on memory retention, and suggests practical applications for education, memory enhancement, and future studies.

via Neuroscience News|

#learning #memory #neuroscience