Recently in CONTINUITY

Monday, January 18, 2021

US Airways Flight 1549 Ditching in the Hudson River: A Pilot's Analysis

Posted at 16:10 Permalink

Diogenes: “Learn to live on lentils”

Posted at 02:10 Permalink

Sunday, January 17, 2021

A Working Edison Light Bulb from 1896

Posted at 13:57 Permalink

Tuesday, January 12, 2021

Origin of the UNIVAC 1103A Scientific Computer (1953, 1956) ERA, Sperry Rand

The Univac 1101 through 1105, all vacuum tube machines, were the first generation of ERA/Univac scientific computers. The second generation, the transistorised Univac 1107, retained the original 36 bit word length, but re-architected the machine into what would be the 1100/2200 series for decades to come. The story of the 1107 and successors picks up in my Univac Memories archive.

Posted at 19:34 Permalink

So Many Ideas, So Little Time…

Some day, let me tell you the story of MTBF.NET and DATAIMMORTALITY.COM….

Posted at 13:13 Permalink

Monday, January 11, 2021

Monsanto's Plastic “Home of the Future” at Disneyland (1957)

Posted at 14:55 Permalink

Sunday, January 10, 2021

Drilling Out the Microphone in Google's Stadia Game Controller

Posted at 16:31 Permalink

Saturday, January 9, 2021

Most Popular Programming Languages, 1965–2019

Posted at 13:58 Permalink

Friday, January 8, 2021

The Tyranny of Big Publishing

Simon says, “Shut up”.

Posted at 14:44 Permalink

Thursday, January 7, 2021

Jamie Hyneman Can't Delete His Content from Facebook

Posted at 14:51 Permalink

Tuesday, January 5, 2021

Orbital Launch Scorecard, 2020

Jonathan McDowell has published his “Space Activities in 2020” [PDF, 112 pages], with the authoritative data we have come to expect from this publication. Below is a summary I have extracted about orbital launch attempts in 2020 by country. There were a total of 114 orbital launch attempts from Earth in the year, of which 104 succeeded in placing their payloads in orbit. In addition, there was one successful orbital launch from the Moon, China's Chang'e 5 sample return ascender, which is not included in the table below.

Country   Launches   Successes   Failures
China 39 35 4
U.S. 37 34 3
Russia 12 12 0
Europe 10 9 1
New Zealand 7 6 1
Japan 4 4 0
India 2 2 0
Iran 2 1 1
Israel 1 1 0
TOTAL 114 104 10

Because it has become increasingly common to deploy multiple payloads from a single orbital launch, whether constellation deployments such as SpaceX's Starlink or ride-share and cubesat swarms, the statistics for payloads orbited look very different from those of launches. Here are payloads orbited in 2020 by country,

Country   Payloads  
U.S. 979
Europe 129
China 74
Other 57
Russia 22
TOTAL 1261

Posted at 11:50 Permalink

Monday, January 4, 2021

Amazon Has Trucks Filled with Hard Drives and an Armed Guard

Related: “168 AWS Services in 2 Minutes”

Posted at 14:40 Permalink

Sunday, January 3, 2021

“At Home, 2001”—Late 1960s View of the 21st Century Home

From the CBS TV series The 21st Century with Walter Cronkite.

Posted at 16:11 Permalink

Saturday, January 2, 2021

Fourmilab Gridmark: Automated Benchmarks for Second Life

Available for free with full permissions in the Second Life Marketplace, with complete source code published at GitHub.

Posted at 13:52 Permalink

Friday, January 1, 2021

Every Orbital Launch Of 2020

Includes launch attempts which did not reach orbit. A summary is at the end of the video.

Posted at 14:50 Permalink

Wednesday, December 30, 2020

BLC1—The Proxima Centauri SETI Candidate

Posted at 12:30 Permalink

Tuesday, December 29, 2020

Nobel Physics Prize Lectures, 2020

Addresses by laureates Roger Penrose, Reinhard Genzel, and Andrea Ghez. I have elided the five minute sanctimonious scientism liturgy at the start.

Posted at 12:15 Permalink

Monday, December 28, 2020

Ma Deuce: The Venerable Browning M2 .50 Caliber Heavy Machine Gun

Still in service more than a century after its introduction. Here's an exemplar in action at the range.

Posted at 12:43 Permalink

Sunday, December 27, 2020

Original Autochrome Colour Photos from Shackleton's Antarctic Expedition

Frank Hurley took a small number of photographs in Autochrome, an early colour process, during Ernest Shackleton's Antarctic expedition. These pictures have been corrected for fading, but are not colourised: the colour is in the original.

Posted at 23:13 Permalink

How Sonar Works (Submarine Shadow Zone)

Posted at 14:46 Permalink