Recent content by collinsmark

Nebraska pics, part 4 (non-bird/critter related), final round. Back in the car for pictures out the passenger window for a bit (Figs. 31-35). Figure 31. Figure 32. Figure 33. Figure 34. Figure 35. That's it for the car. The rest of the photos are either in or near an airplane...

Nebraska pics, part 3 (non-bird/critter related). These are all from Omaha's Old Market area. Figure 21. Omaha Passageway in Old Market. Figure 22. Omaha central park (a.k.a. Gene Leahy Mall). Figure 23. "Ah, yes. Reminds me of my teenage years." Figure 24. Figure 25. Figure 26...

Nebraska pics, part 2 (non-bird/critter related). Figures 11-16 were taken from a moving vehicle, with the technique discussed in part 1 of this series. After that, photos were taken on foot. Figure 11. Figure 12. Don't worry, everybody's OK. Those cars are used by the local fire department...

Nebraska bird pics, round 5. The final round for this trip. Figure 34. Common grackle (Quiscalus quiscula). Figure 35. Common grackle jumping/dropping from one branch to another (Quiscalus quiscula). This pic captures their normal black look. You can see how easily they can be confused...

Nebraska bird pics, part 4. Figure 26. Mourning dove (Zenaida macroura). Figure 27. House Sparrow (Passer domesticus). There weren't very many sparrows around for this trip (or finches for that matter). This is the only one I got. Figure 28. Common grackle (Quiscalus quiscula). Figure...

Non-bird/critter related Nebraska pics, part 1. I'll start with a series of photos I took from the passenger seat of a car while diving from place to place (I wasn't driving). These picture were all taken at full speed (roughly 55 mph [90 km/h]) through the window glass. All photos in this...

... Continued from previous post. Nebraska bird pics, part 3. Figure 18. Blue jay on a birdbath (Cyanocitta cristata). Figure 19. Blue jay on a birdbath (Cyanocitta cristata). My lens isn't a zoom, but my camera has enough resolution in the sensor that I can crop in pretty well. Figure...

Back to the Nebraska bird pics (round #2). Figure 11. A couple of common grackles (Quiscalus quiscula). Here you can see their colors a little better. Grackles usually appear pretty much black and can easily be confused with blackbirds and crows. But in the right light you can see the...

[2/2] One more post of pics from the vigil. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. Figure 19. Figure 20. Okay, that's all I'll post of this vigil event here. I'll get back to the Nebraska pics and some downtown San Diego pics...

( [1/2] This post of photos is jumping order due to its nature as a current event. I want to post these first, even if they are not in chronological order with my previous and upcoming posts. I'll post more Nebraska and downtown San Diego pics later.) I walked to a vigil Tuesday to show support...

I won't rate them on a scale, but I will repeat what I've said before: I like them. (I've seen some of these photos from a previous post, several years ago [and I remember commenting on them at the time]. Some of the photos are good enough that I still remember them.) There's definitely some...

Nebraska bird/critter pics round 1. Taken a few weeks ago on a trip to eastern Nebraska. Figure 1. Mourning dove (Zenaida macroura) Figure 2. American robin (Turdus migratorius). Figure 3. Eastern cottontail (Sylvilagus floridanus). Figure 4. American robin (Turdus migratorius)...

Cherry blossoms are cool, but I think this image might be AI generated.

(Came in on other social media feed. Not mine originally.) New formula for \pi : \pi = \prod_{\pi = \pi}^\pi \pi

I get a lot of chess puzzles coming in on my social media feed. Most are of the form, "Black to move. Mate in 2!" which I read in my head, Black to move, mate in 2 factorial, ...which is also 2.