Today's bike ride to work sucked. Wearing a respirator for 30 minutes isn't very comfortable. I had to adjust it a few times and it was much worse breathing in the wildfire smoke so respirator it is.
I can only assume our climate will get worse as time goes on so I figured I might want to get used to this.
#BikeTooter
About one in eight people globally have some form of sleep apnea.
Sleep apnea causes breathing to stop and start several times during sleep.
This happens because either your airway is blocked, known as obstructive sleep apnea,
or you brain isn’t controlling your breathing as it should, known as central sleep apnea.
For decades, the main form of treatment for this population has been the continuous positive airway pressure (CPAP) machine, which helps keep a person’s a…
Lazing on a sunny afternoon (channeling Ray Davies) #dogs #dogsofmastodon
Southern Ontario is having smoke roll through from wildfires in the north-west of Ontario. It's incredibly bad here in the Kitchener. Can't stand outside for a prolonged time without having difficulty breathing.
My dad, brother, mom, and me at the US bicentennial. I vaguely remember this was some celebration at Valley Forge National Park in PA. We were living in NJ at the time, so we're posed in front of the NJ wagon.
As a kid who was not allowed to have internet, I didn't know much about the world back then. but I'm quite sure the world is a better place today, despite all the fuckery going on right now.
I mean, we were breathing leaded gasoline, among other things.
RE: https://mstdn.social/@Free_Press/116485623045792295
Reminder that we all inhabit the same thin envelope of air that covers our planet. So you and I will soon be breathing in this crap as well.
Stop the wars.
🇺🇦 #NowPlaying on BBCRadio3's #RoundMidnight
Jasper HŸiby's 3 Elements:
🎵 Breathing
#JasperHøibys3Elements
Tens of thousands of people in southeast Los Angeles County
have been engulfed in a dense cloud of smoke for nearly a week
as a fire continues to tear through a massive refrigerated warehouse in Boyle Heights.
Toxic air has covered the San Gabriel Valley and beyond at times,
as the fire continues to burn and the wind shifts the pall in different directions.
People have reason to be concerned about their loved ones breathing in the plume, experts say.
“The…
Conditional Normalizing Flow for Gas-Surface Scattering from Thermal to Hypersonic Velocities
Miklas Sch\"utte, Stephen Hocker, Hansj\"org Lipp, Johannes Roth, Stefanos Fasoulas, Marcel Pfeiffer
https://arxiv.org/abs/2606.31928 https://arxiv.org/pdf/2606.31928 https://arxiv.org/html/2606.31928
arXiv:2606.31928v1 Announce Type: new
Abstract: Accurate aerodynamic modeling of satellites in very low Earth orbit (VLEO) requires gas-surface interaction (GSI) models that capture the full velocity spectrum from thermal to orbital speeds. Atmospheric particles initially strike spacecraft surfaces at hypersonic velocities of 6 000 - 10 000 m/s. Due to surface roughness and complex geometries, especially within air-breathing electric propulsion (ABEP) intake systems, multiple collisions occur, progressively reducing the particle velocities. A recent machine learning framework for deriving scattering kernels from molecular dynamics (MD) simulations has shown promise, but remains limited to high-velocity single impacts and possibly violates fundamental equilibrium principles such as detailed balance. This work extends this machine learning based scattering kernel to cover the complete velocity range using conditional normalizing flows trained with physics-informed constraints, enabling accurate modeling of multi-bounce scenarios in realistic VLEO applications. We train a conditional Real-valued Non-Volume Preserving (cRealNVP) model on expanded molecular dynamics simulations covering velocities from thermal to hypersonic speeds, incorporating a detailed balance loss term. The resulting model demonstrates improved accuracy compared to previous approaches even in the original high-velocity regime, while successfully capturing thermal-velocity scattering. Quantitative assessment shows that thermalization is approximated within acceptable tolerances. This framework provides essential capabilities for accurate ABEP intake optimization and VLEO mission planning while offering a general methodology applicable to broader rarefied gas dynamics problems requiring thermodynamic consistency.
toXiv_bot_toot
“But AC contributes to climate change!”
Heating does so a thousand times more (most ways of heating are very inefficient and directly produce CO2), yet no one is asking people to just not heat in winter.
Also stop breathing, that also contributes to climate change.