Wizard’s #Castle game from July/August 01980 issue of Recreational Computing magazine. Written for Exidy Sorcerer by Joseph R. Power. Modified for Heath Microsoft BASIC by J.F.Stetson. #retrocomputing #games
#CPM “FOG Library disk FOG-CPM.066” #retrocomputing #games collected by the First Osborne Group, mostly in #BASIC
First Osborne Group library disks for #CPM #retrocomputing, including #games, printer drivers, example Pascal code, dBase II programs, an outliner called TOUR, assemblers and disassemblers, Supercalc spreadsheets, etc. From 01985 to 01991.
Scan of the July 01980 issue of Recreational Computing with the Wizard’s #Castle type-in #BASIC. #retrocomputing #games
When #SpaceX #Starship exploded in 02023, it opened up a hole in the ionosphere which closed again in 20–30 minutes, but not in the ozone layer. #environment #space
There was a famous open letter by a famous scammer claiming that #SpaceX rockets opened up holes in the ozone layer, but it turned out not to be true. #environment #space
‘“Ten years ago, the amount of [ozone-depleting] emissions [from rockets] was not great,” said Martin Ross, an engineer at the Aerospace Corp. whose research focuses on the effects of #space systems on the stratosphere. “Today, the effect is still small, but it’s growing.” (...) Ross has been modeling how the chemistry of rocket exhaust affects the stratospheric ozone layer for years. (...) Solid-fueled rocket motors, such as the side boosters that were used in the shuttle program or will be used for NASA’s heavy-lift Space Launch System, pose the knottiest problems, “in that the emissions are a more varied mix,” Ross said.
Those rockets emit black carbon (basically, soot) as well as alumina particles and chlorine-based compounds. All three types of emissions can promote ozone-destroying reactions, particularly when they’re injected directly into the stratosphere.
When it comes to kerosene-fueled rockets, such as #SpaceX’s Falcon 9 and Falcon Heavy, black carbon is the primary concern. “Once those particles get into the stratosphere, they stay in there for three or four years,” Ross said.’ #environment
concern that #space satellites might damage the ozone layer upon reentry because of metallic ash #environment
#CC #paper on how #space satellites produce #alumina that can deplete the ozone layer upon reentry. “Satellites burn up at the end of service life during reentry, generating aluminum oxides as the main byproduct. These are known catalysts for chlorine activation that depletes ozone in the stratosphere. We present the first atomic-scale molecular dynamics simulation study to resolve the oxidation process of the satellite’s aluminum structure during mesospheric reentry, and investigate the ozone depletion potential from aluminum oxides.” #environment
#news #video about #UFOs (euphemized as "UAPs", unidentified anomalous phenomena) interfering with air safety. “The question that we really have to figure out is, is it China or is it not human? (...) Would you say that’s fair? / Dr. Gallaudet: Uh, yes, Congressman, (...)” #USA #politics
#news #video State Department spokesperson Matthew Miller tonight about #ATACMS missile strikes on Russia: “No, I’m not gonna confirm it. I am not gonna confirm that report. #Ukraine, of course, is free to speak to what they have or have not done, but I’m not gonna confirm at this point any US policy change.” #USA #politics
#news #video excerpted from a House Oversight Committee Congressional hearing about how #FEMA workers doing hurricane relief were advised to “avoid homes advertising Trump” in a list of safety measures, along with “not one goes anywhere alone”, “practice de-escalation and preventative measures”, and “communicate and follow the rules”. #USA #politics
two-hour #news #video of the House Transportation & Infrastructure Committee interrogating #FEMA administrator Deanne Criswell. #USA #politics
#Argentina #politics #news #video: #Milei is like a child, according to the head of Rapa Nui, Diego Fenoglio. Only Brazil, South Africa, Colombia, and Mexico have worse income inequality. Deutsche Welle reporting.
When #Trump tried to invoke the Insurrection Act to suppress the George Floyd protests. #USA #politics #history
#PDF of Tanenbaum’s #paper “Implications of Structured Programming for Machine Architecture” in which he proposes the EM-1 compact bytecode
#video #toread of printing a printed circuit board by melting solder onto it with a CNC mill driven by Mach3 G-code (generated by a 3-D printing slicer) with a fourth axis added for the extruder. The purported advantage is that it’s very easy to rework; you can lift a trace with an X-Acto knife and install new traces with tweezers.
#video of reinvented ancient plumbata (lawn dart) #weaponry using a loop of cord at the back end of an arrow to keep the shaft in pure tension during the throw, allowing the lead weight to be 30 “inches” from his hand. The long, thin barbed point in front of the lead weight gives potentially very large penetration depth. He throws his 130g prototype plumbatae at 47 meters per second (140J) with a maximum range of some 180 meters.
#video of Dexter Taylor, sentenced to ten years in prison for making his own guns. #weaponry
#video showing Roman pilum effectiveness against a shield. #weaponry #history