Google Ai loses the ability
NoSpotOfGround
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What is this pattern printed on a medicine packet?
History of luminous efficacy of lighting technologies
History of luminous efficacy of lighting technologies - Lemmy.World
From this paper: [https://www.nature.com/articles/s41560-025-01757-1] > Data points indicate best performers by year of market introduction. > > The magnified plot shows progress in cool white LEDs from 1996 to 2020. For comparison, efficacies of best performers in legacy lighting technologies for 2020 are shown as coloured horizontal lines. > > Note the logarithmic scale of the vertical axis on the main plot and the linear scale on the magnified plot. From this article: [https://techxplore.com/news/2025-05-decades-white-key-drivers.html] > most improvements in the energy efficiency of LEDs were driven by research and development efforts. Surprisingly, however, R&D contributed relatively little to reductions in the cost of the devices, which were instead linked to economies of scale and continuous manufacturing process improvements over time.
Why is this ballpoint pen spring shaped like this?
Why is this ballpoint pen spring shaped like this? - Lemmy.World
Why is the spring strengthened in the middle? It doesn’t seem to affect the spring’s buckling characteristics. My speculation is that it’s to reduce spring noise. That strengthened region at the middle is where the spring will buckle outwards most, resting against the barely visible side rails on the inside of the case. Instead of just one wobbly contact point it now has three rigid ones as a “skate” to reduce the stick-slip noise when opening and retracting the tip. Is this right? (The pen is a Mitsubishi Uni-Ball Power Tank, pretty much my favorite model.)