Society should learn to celebrate and capitalise on its
“massive cohort of healthy, active, older, creative adults”,
a leading population expert has said.
While pundits and pressure groups have raised concerns over falling fertility rates, highlighting the challenges for the economy and healthcare,
others are more upbeat, arguing the rise of the “silver economy” brings new opportunities for growth.
Prof Sarah Harper, director of the Oxford Institute of Populatio…
Favorite passtime:
Watching the transition clips on BBC Antiques Roadshow to spot tat that people have taken along with so much hope, only to be shot down in flames, with exclamations of “tat!”
Moody Urbanity - Stand 🧍♂️
情绪化城市 - 立 🧍♂️
📷 Nikon FE
🎞️ Ilford HP5 Plus 400, expired 1993
#filmphotography #Photography #blackandwhite
Graphene and thin graphite films for ultrafast optical Kerr gating at 1 GHz repetition rate under focused illumination
Amr Farrag, Assegid M. Flatae, Mario Agio
https://arxiv.org/abs/2511.17713 https://arxiv.org/pdf/2511.17713 https://arxiv.org/html/2511.17713
arXiv:2511.17713v1 Announce Type: new
Abstract: The ability to address sub-picosecond events of weak optical signals is essential for progress in quantum science, nonlinear optics, and ultrafast spectroscopy. While up-conversion and optical Kerr gating (OKG) offer femtosecond resolution, they are generally limited to ensemble measurements, making ultrafast detection in nano-optics challenging. OKG, with its broadband response and high throughput without phase-matching, is especially promising when used at high repetition rates under focused illumination.
Here, we demonstrate an ultrafast detection scheme using the third-order nonlinearity of graphene and thin graphite films, operating at 1 GHz with sub-nanojoule pulses and achieving 141 fs temporal resolution. Their exceptionally large nonlinear refractive index, orders of magnitude higher than conventional Kerr media, enhances detection efficiency at smaller thicknesses, enables sub-picosecond response, and supports broadband operation. Their atomic-scale thickness minimizes dispersion and simplifies integration with microscopy platforms, optical fibers, and nanophotonic circuits, making them a compact, practical material platform for nano-optical and on-chip ultrafast Kerr gating.
toXiv_bot_toot
Flame Skimmer Dragonfly hanging onto a branch with its mandibles. LA Arboretum, Arcadia, California, USA. October 2025. OM System OM-1 M.Zuiko 300mm F4. #laarboretum #dragonfly #flameskimmer
In a groundhog day loop of explaining why this hierarchical model cannot effectively be represented in the unified flat format they're trying to push. You can absolutely represent it in a flattened way, but it requires breaking out the child components into their own collection.
We end, once again, with the telling pause of disinterest and multitasking, followed by a distracted "mmm hmm" and promises to circle back on it later.
This is Bryan. Once a week, he takes a shelter pup on a New York City adventure in his ‘Adopt Me’ backpack, hoping someone will fall in love. He films their big day out, and almost every dog he’s featured has found a forever home.
https://people.com/pet-influencer-h…
Series A, Episode 01 - The Way Back
VARON: It's not absolute proof, but it gives us somewhere to start.
MAJA: But why would they have been to the clinic?
VARON: Mental implantation?
MAJA: What's that?
https://blake.torpidity.net/m/101/293 B7B5