techhub.social is one of the many independent Mastodon servers you can use to participate in the fediverse.
A hub primarily for passionate technologists, but everyone is welcome

Administered by:

Server stats:

5.2K
active users

#TimeDilation

0 posts0 participants0 posts today

My congressional rep whined again about trump...
I foresee two years hence, if Trump hadn't ended the constitution sooner, where democrats wise up and elect folks with both social intelligence, commonsense and guts. Time dilation in Trumpland makes an hour like a day, a day like a month, a month a year, etc. Could be a couple of centuries..
Sadly republicans are using the new york minute as their unit for action...
#timedilation #procrastination #trump #republicans #democrats

Notes on #UAP Discussions:
In the recent #Subreddit AMA with #LeslieKean, #HalPuthoff , #GaryNolan and #JimSegala Hal mentions relativistic #TimeDilation in the local frame under acceleration as a possible reason pilots don’t go splat in observed extreme hi g maneuvers UAP are often observed to execute. Not sure that works…but localized antigravity does if the local frame is effectively massless…which it should be.Changing terms to start on the time axis seems cumbersome
youtube.com/live/9G6HDuLwYWY?s

#Physics bits: When we talk about challenges of #Interstellar travel relativistic #TimeDilation is always in play for scenarios where practical velocities need to be some significant percentage of the speed of light.Even if we find ways to circumvent diminishing returns wrt power required to accelerate a given mass under gravitational constraints it seems odd that quantum mechanics is constraint free under simultaneous measurement unrestricted by distance.We are missing a #Symmetry. Irritating-

Tuesday #NoeticSpectrum : An experienced sense of #TimeDilation in #NDE 'rs is one of the more striking consistencies in deep phases of the journey.We know (or at least think we know) a similar sensation in dreams and other experiences. We simply don't know how to ask the right questions when it comes to consciousness being the first order filter when the physical body is out of commission. Most of us don't disbelieve the Moon because we haven't been there- we can see it. Still weird though-

Continued thread

...tangents to conversations elsewhere. #Astros had a good time with #Interstellar but many still walked away thinking the #TimeDilation bits were a stretch. In truth they stand up pretty well to the actual thing- which are in fact actual things.You can plug different variables in at various places for different scenarios, #BlackHoles and horizons, and get accurate results. It can get pretty hairy out there. Kip Thorne wrote a great book btw

Optical Variability of #Quasars with 20-Year Photometric #LightCurves / Detection of the Cosmological #TimeDilation of High Redshift Quasars: arxiv.org/abs/2201.02762 / arxiv.org/abs/2306.04053 -> Astronomers see ancient galaxies flickering in slow motion due to expanding space: theconversation.com/astronomer

arXiv.orgOptical Variability of Quasars with 20-Year Photometric Light CurvesWe study the optical $gri$ photometric variability of a sample of 190 quasars within the SDSS Stripe 82 region that have long-term photometric coverage during $\sim 1998-2020$ with SDSS, PanSTARRS-1, the Dark Energy Survey, and dedicated follow-up monitoring with Blanco 4m/DECam. With on average $\sim 200$ nightly epochs per quasar per filter band, we improve the parameter constraints from a Damped Random Walk (DRW) model fit to the light curves over previous studies with 10-15 yr baselines and $\lesssim 100$ epochs. We find that the average damping timescale $τ_{\rm DRW}$ continues to rise with increased baseline, reaching a median value of $\sim 750$ days ($g$ band) in the rest-frame of these quasars using the 20-yr light curves. Some quasars may have gradual, long-term trends in their light curves, suggesting that either the DRW fit requires very long baselines to converge, or that the underlying variability is more complex than a single DRW process for these quasars. Using a subset of quasars with better-constrained $τ_{\rm DRW}$ (less than 20\% of the baseline), we confirm a weak wavelength dependence of $τ_{\rm DRW}\propto λ^{0.51\pm0.20}$. We further quantify optical variability of these quasars over days to decades timescales using structure function (SF) and power spectrum density (PSD) analyses. The SF and PSD measurements qualitatively confirm the measured (hundreds of days) damping timescales from the DRW fits. However, the ensemble PSD is steeper than that of a DRW on timescales less than $\sim$ a month for these luminous quasars, and this second break point correlates with the longer DRW damping timescale.