User contributions for Macchess

11 April 2025

• 20:5620:56, 11 April 2025 diff hist +1 m AccuWeather →National Weather Service: Corrected typo - added space to separate "it" and "does" in "it does"

21 March 2025

• 03:5403:54, 21 March 2025 diff hist +2 Heliograph Correct error: the signal lamps used in the Boer war were not Aldis lamps. The term "Aldis lamp" entered the English language in 1916-1917 current
• 03:3903:39, 21 March 2025 diff hist +13 Heliograph Correct error: the reference says "8 inches square" meaning 8 inches x 8 inches, for an area of 64 in^2 or 413 cm^2

3 February 2025

• 21:2321:23, 3 February 2025 diff hist −5 Gaia (spacecraft) →Data releases: updated tense from "has been" to "was", now that both parts have been released.

26 January 2025

• 21:4021:40, 26 January 2025 diff hist +33 Heliograph Add Wikimedia link to "Heliographs"

12 October 2024

• 21:5021:50, 12 October 2024 diff hist +2,652 Talk:Optical telegraph →Murray shutter chain speed.: Reply current Tag: Reply
• 05:2105:21, 12 October 2024 diff hist +352 Talk:Optical telegraph →Murray shutter chain speed.: Reply Tag: Reply
• 05:0305:03, 12 October 2024 diff hist 0 Optical telegraph →United Kingdom: Changed "replacement semaphore" to "replacement telegraph" - existing system was shutter telegraph, and successor could have been.
• 04:5704:57, 12 October 2024 diff hist +23 Optical telegraph →Etymology and terminology: Cited existing named reference (Axon1880) crediting Melito for convincing Chapped to adopt "telegraphe"
• 03:4303:43, 12 October 2024 diff hist +269 Optical telegraph →Etymology and terminology: Cite primary reference for Chappe original term Tachygraph, and change to télégraphe

5 August 2023

• 18:4918:49, 5 August 2023 diff hist +1 Second Boer War British cost of the war was 19.9 billion pounds, per tabler below, not 200+ billion

19 June 2023

• 20:2920:29, 19 June 2023 diff hist +43 Meccano →External links: Repointed Meccano GMM Model Plans link to archived site - almost all links at the "current' site are "links to nowhere"
• 20:2520:25, 19 June 2023 diff hist +92 Meccano →External links

10 June 2023

• 20:4820:48, 10 June 2023 diff hist +189 Optical telegraph Replaced origin of "semaphore" (which is already in a lower section), with origin of "telegraph". "Semaphore" was never a term used by Chappe for his devices.

30 May 2023

• 16:3416:34, 30 May 2023 diff hist −1 Heliograph →History: Correct syntax error in last argument to "convert" operator on conversion from miles to kilometers

18 May 2023

• 18:1818:18, 18 May 2023 diff hist −8 Signal lamp Removed description of signal lamps as a semaphore system. Semaphore systems communicate by changing physical configurations, typically arms mounted to a post, or human arms.

7 May 2023

• 19:2319:23, 7 May 2023 diff hist +384 Mangin mirror Correct Invention year from 1876 to 1874 per the cited 1874 reference.

8 February 2023

• 20:3520:35, 8 February 2023 diff hist +2,325 Talk:Heliograph →Semaphore: Reply Tag: Reply

10 January 2023

• 06:1906:19, 10 January 2023 diff hist +230 Heliograph Replace semaphore by "solar telegraph". When I search Google books with the word pair <heliograph semaphore> every example I found used those terms as distinguishing, not synonomous. The general term that encompasses both is telegraph, dating back to 1793 per Mirriam-Webster (and, I believe, the term Chappe used for his semaphore)

5 January 2023

• 06:1106:11, 5 January 2023 diff hist +4,252 User talk:Wtshymanski →The "Clacks" as an appropriate Popular Culture reference for Optical Telegraph: new section Tags: Reverted New topic

29 December 2022

• 21:0821:08, 29 December 2022 diff hist +179 Rotation matrix Undid revision 1130360686 by 94.143.197.126 (talk) - the result was an unparseable equation leaving many lines of error messages displayed on the page. Tag: Undo

28 December 2022

• 00:5000:50, 28 December 2022 diff hist +2,625 Optical telegraph →In popular culture: Added Clacks in response to SpinningSparks request for source provided discussing its significance to popular culture - Simon Webb (p.50, bottom) says such fiction is now the main way the public learns about the optical telegraph concept. Tag: Reverted

14 December 2022

• 22:0522:05, 14 December 2022 diff hist +569 User talk:Macchess Updated last response to add John Voight's book: "Quaternion Algebras"

13 December 2022

• 23:3523:35, 13 December 2022 diff hist +6 Quaternions and spatial rotation →External links and resources: Updated the Roestta Code page description to reflect increase from >30 languages to >75 languages.
• 23:3123:31, 13 December 2022 diff hist +9 Quaternions and spatial rotation →Using quaternions as rotations: clarified that the 2:1 mapping is from physical rotations to rotational transformation matrices.
• 23:2923:29, 13 December 2022 diff hist +136 Quaternions and spatial rotation →Using quaternions as rotations: Tried to clarify the 2:1 mapping from physical rotations to rotation transformation matrices, wikilinked the 2:1 SU(2) to SO(3) for the more mathematically inclined.
• 23:1323:13, 13 December 2022 diff hist +2,330 User talk:Macchess →Re: Quaternions: Reply Tag: Reply
• 08:4808:48, 13 December 2022 diff hist +14 Quaternions and spatial rotation Added "physical" to "rotation" to describe the process encoded by the two distinct SU(2) elements that map to a single SO(3) element.
• 08:4508:45, 13 December 2022 diff hist +909 User talk:Macchess →Re: Quaternions: Suggested "physical rotation"
• 08:3608:36, 13 December 2022 diff hist +12 User talk:Macchess →Re: Quaternions
• 08:3508:35, 13 December 2022 diff hist +3,123 User talk:Macchess →Re: Quaternions: Reply Tag: Reply
• 05:2405:24, 13 December 2022 diff hist +1,005 N User talk:11wx →Quaternions and Spatial Rotations: new section Tag: New topic
• 05:0905:09, 13 December 2022 diff hist +532 Quaternions and spatial rotation →Using quaternions as rotations: Rewrote the section on the two-to-one mapping from quaternions to orientations again, to clarify the geometric reasons and implications of this.
• 02:5402:54, 13 December 2022 diff hist 0 Quaternions and spatial rotation →Using quaternions as rotations: Fixed error in my prior entry: q and -q represent rotations by theta and theta - 2*pi
• 02:5002:50, 13 December 2022 diff hist +605 Quaternions and spatial rotation →Using quaternions as rotations: Relocated and clarified the discussion of the two-to-one mapping from quaternions to rotational transformations.

2 October 2022

• 23:0323:03, 2 October 2022 diff hist +3,398 User talk:109.70.40.55 Explained reversion in "Quaternions and spatial rotation"
• 22:2022:20, 2 October 2022 diff hist +20 Quaternions and spatial rotation Undid revision 1113502711 by 109.70.40.55 (talk): this removed the contribution from 03:52, 25 January 2022 without explanation. The original contributor explained a justification for the addition - that the cited reference that was the basis of this section made it clear that this alternate convention was non-standard and should be discouraged. Tag: Undo
• 22:1622:16, 2 October 2022 diff hist +1 Quaternions and spatial rotation Undid revision 1113502792 by 109.70.40.55 (talk) in order to revert this and the prior revision, which were done without comment, and removed this contribution: Tag: Undo

12 August 2022

• 22:2522:25, 12 August 2022 diff hist +18 Heliograph →History: WIkilinked "Jowaki Afridi Expedition" (term used in references) to https://en.wikipedia.org/wiki/Jowaki_Expedition

21 July 2022

• 19:1419:14, 21 July 2022 diff hist 0 Operation On-Target →Background: changed "is now" to "became" regarding the Varsity Team Features Volume II book, since the Varsity program was retired.

12 June 2022

• 19:3519:35, 12 June 2022 diff hist +44 Aviation light signals Changed dead link to Internet Archive cached version

29 March 2020

• 21:2621:26, 29 March 2020 diff hist −276 Life Care Centers of America Moved summary of the Kirkland COVID-19 outbreak from the New England Journal of Medicine paper to the summary paragraph, edited for succinctness.

28 March 2020

• 22:5322:53, 28 March 2020 diff hist +401 Life Care Centers of America →COVID-19 Mortality: March 12–23
• 22:4522:45, 28 March 2020 diff hist +230 Life Care Centers of America →COVID-19 Mortality: March 12–23: More information from the New England Journal of Medicine paper added.
• 22:3522:35, 28 March 2020 diff hist −215 Life Care Centers of America →COVID-19 Mortality: March 12–23: Remove reference to "residents died" - death announcements did not specify resident/visitor status, only age bracket
• 22:3122:31, 28 March 2020 diff hist +914 Life Care Centers of America →COVID-19 Mortality: March 12–23: Included information from March 27,2020 paper in the New England Journal of Medicine

25 March 2020

• 19:2019:20, 25 March 2020 diff hist +424 Life Care Centers of America →COVID-19 Mortality: March 12–23: Updated per March 23 health department post

22 March 2020

• 01:0701:07, 22 March 2020 diff hist 0 Life Care Centers of America →COVID-19 Mortality: March 12–18: Updated to "21", since no deaths associated with Life Care Center of Kirkland for March 19, 20 or 21.

21 March 2020

• 06:1206:12, 21 March 2020 diff hist +424 Life Care Centers of America →COVID-19 Mortality: March 12-18: Updated from King County data through March 20 (no deather reported on March 19 or 20 associated with the Life Care Center of Kirkland

19 March 2020

• 05:4105:41, 19 March 2020 diff hist −4 Life Care Centers of America →COVID-19 Mortality: March 12-15: spelling corrections and wording change