These records served as a one time pads, allowing the transmitted signals to be as random as possible. This photo shows the specialized turntables used for encoding/decoding modulated speech signals. Two turntables allowed one to be cued up while the other was in use.
December 1, 2025 at 12:41 AM
These records served as a one time pads, allowing the transmitted signals to be as random as possible. This photo shows the specialized turntables used for encoding/decoding modulated speech signals. Two turntables allowed one to be cued up while the other was in use.
October 31, 2025 at 7:37 PM
Portland Airport, PDX
October 27, 2025 at 7:18 AM
Portland Airport, PDX
It is fantastic to imagine what went on there. From the top of Monks Mound St. Louis is visible on the horizon. Many other earthworks are at Cahokia.
October 13, 2025 at 6:32 PM
It is fantastic to imagine what went on there. From the top of Monks Mound St. Louis is visible on the horizon. Many other earthworks are at Cahokia.
Refraction through a thin layer of dye in a small beaker.
September 22, 2025 at 7:40 PM
Refraction through a thin layer of dye in a small beaker.
~1892 "Section 5" map with "Portland Mount Tabor & Eastern RY" streetcar line.
August 16, 2025 at 8:46 PM
~1892 "Section 5" map with "Portland Mount Tabor & Eastern RY" streetcar line.
Marriage of Wallace B Smith and Phebe Jane Foulke 8 Apr 1949, Minneapolis, Minn.
July 24, 2025 at 11:13 PM
Marriage of Wallace B Smith and Phebe Jane Foulke 8 Apr 1949, Minneapolis, Minn.
"[Jagadish Chandra Bose's] galena detector from his 1901 patent. This version was deliberately made to look and function like a human eyeball, with a lens focusing millimeter waves on the galena contact."
en.wikipedia.org/wiki/Jagadis...
en.wikipedia.org/wiki/Jagadis...
July 15, 2025 at 10:00 PM
"[Jagadish Chandra Bose's] galena detector from his 1901 patent. This version was deliberately made to look and function like a human eyeball, with a lens focusing millimeter waves on the galena contact."
en.wikipedia.org/wiki/Jagadis...
en.wikipedia.org/wiki/Jagadis...
Playing to the crowd on Mt. tabor
June 3, 2025 at 2:40 AM
Playing to the crowd on Mt. tabor
Uninterrupted northern hardwood forest in Catskill Park, New York. The field of view of the first is about 3.8 km at its widest, and the rest are centered on the first. Google Earth 2016-10-09 historic imagery.
June 2, 2025 at 10:16 PM
Uninterrupted northern hardwood forest in Catskill Park, New York. The field of view of the first is about 3.8 km at its widest, and the rest are centered on the first. Google Earth 2016-10-09 historic imagery.
Student Commons building of Portland Community College, Southeast Campus.
May 21, 2025 at 6:33 PM
Student Commons building of Portland Community College, Southeast Campus.
Same, Columbia River Gorge, across from The Dallas.
April 28, 2025 at 5:24 AM
Same, Columbia River Gorge, across from The Dallas.
Same, a bit more abstractly.
April 26, 2025 at 11:14 PM
Same, a bit more abstractly.
Monastery of the Precious Blood, Portland, Oregon. Currently the building houses St. Andrew’s Memory Care.
April 15, 2025 at 8:38 PM
Monastery of the Precious Blood, Portland, Oregon. Currently the building houses St. Andrew’s Memory Care.
Carquinez Staight from Google Earth.
April 10, 2025 at 5:48 PM
Carquinez Staight from Google Earth.
Big Bear Bald eagles sit for a portrait.
www.youtube.com/live/B4-L2nf...
www.youtube.com/live/B4-L2nf...
April 3, 2025 at 9:54 PM
Big Bear Bald eagles sit for a portrait.
www.youtube.com/live/B4-L2nf...
www.youtube.com/live/B4-L2nf...