- The following is an archived discussion of the DYK nomination of the article below. Please do not modify this page. Subsequent comments should be made on the appropriate discussion page (such as this nomination's talk page, the article's talk page or Wikipedia talk:Did you know), unless there is consensus to re-open the discussion at this page. No further edits should be made to this page.
The result was: promoted by Theleekycauldron (talk) 05:47, 1 November 2021 (UTC)
Christiaan Huygens
One of the first pendulum clocks designed by Christiaan Huygens alongside his treatise Horologium Oscillatorium (1673)
- ... that the first pendulum clock was invented in 1657 by Christiaan Huygens? Source: In 1657, inspired by earlier research into pendulums as regulating mechanisms, Christiaan Huygens invented the pendulum clock, which was a breakthrough in timekeeping and became the most accurate timekeeper for the next 275 years until the 1930s. Marrison, W. (1948). "The Evolution of the Quartz Crystal Clock". Bell System Technical Journal. 27 (3): 510–588. doi:10.1002/j.1538-7305.1948.tb01343.x.
Improved to Good Article status by Guillermind81 (talk). Self-nominated at 15:24, 16 October 2021 (UTC).
- Starting this review shortly. Ktin (talk) 20:06, 16 October 2021 (UTC)
| General: Article is new enough and long enough
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| Policy: Article is sourced, neutral, and free of copyright problems
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| Hook: Hook has been verified by provided inline citation
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| Image: Image is freely licensed, used in the article, and clear at 100px.
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Overall: 
Article meets eligibility criteria. Was recently promoted to GA. I will lean heavily on the due-diligence done during the GA promotion process. Taking the hook citation from the reference. The image is used in the article and looks reasonable. I find the hook interesting, though it is a matter of personal preference. I do not see a QPQ. Please share that once done. Ktin (talk) 20:09, 16 October 2021 (UTC)
- Ktin, as best I can determine, this is the first DYK by this nominator. As such, they are not required to supply a QPQ. Also, with all due respect, DYK reviewers should never rely on the GA review for anything here at DYK: it is your responsibility to do all of the usual checks, from neutrality to the inline citations in each paragraph to copyvio/close paraphrasing/plagiarism checks. We have found issues with some past GAs that have required fixing at DYK (and more than one GA has been revoked because of DYK scrutiny). Thank you for not leaning at all on this one or in future reviews. BlueMoonset (talk) 06:23, 17 October 2021 (UTC)
- Sounds good @BlueMoonset:. @Guillermind81: -- firstly, amazing work on the article. I have added a few [citation needed] tags across the article. Should be easy to fix. Most of them might just need addition of a reference that has already been used elsewhere in the article, I suspect. Found that the works section was lacking in sources. Can you have a look at that as well? Ktin (talk) 04:16, 18 October 2021 (UTC)
- @Ktin: Thanks for your feedback. I've added the references requested in the original article, including the works section. Let me know if there are any other edits you think are necessary. Guillermind81 (talk) 16:34, 18 October 2021 (UTC)
- Thanks @Guillermind81: that was quick. I was doing a round of copyvio checks and the tool kept working for a long time (understandable given the size / number of links). But, it came back with a 62.3% violation possible score [1], which I think is not truly reflective of the quality of the article with most of the matches either being names of works that have been rightly used as-is or quoted text. The highest match was was with an Encyclopedia.com article. There is one paragraph and you can see that at the link provided, that seems to be a very close paraphrasing.
Using a technique equivalent to Richardson extrapolation, Huygens approximated the centre of gravity of a segment of a circle by the centre of the gravity of a segment of a parabola, and thus finding an approximation of the quadrature; with this he was able to refine the inequalities between the area of the circle and those of the inscribed and circumscribed polygons used in the calculations of π. From these theorems, Huygens obtained two set of values, the first between 3.1415926 and 3.1415927, and the second between 3.1415926538 and 3.1415926533. Huygens also showed that the same approximation with segments of the parabola, in the case of the hyperbola, yields a quick and simple method to calculate logarithms. He appended a collection of solutions to classical problems at the end of the work under the title Illustrium Quorundam Problematum Constructiones (Construction of some illustrious problems).
Please can you re-examine this text? I think once done we are almost there. Ktin (talk) 03:13, 19 October 2021 (UTC)
- @Ktin: Thanks again for getting back to me. I've changed the wording based on your feedback; let me know if further changes are needed.Guillermind81 (talk) 16:40, 19 October 2021 (UTC)
- @Guillermind81:, Thanks much. Looks good. [2] Copyvio score says 53%, but, most of the hits are phrases, names of works, and direct quotes. Should be good imo. Added two minor [citation needed] tags. Please have a look. Once that is done. I will approve this hook. Ktin (talk) 18:23, 19 October 2021 (UTC)
- @Ktin: I've added citations to the two places you requested. Please take a look. Thank you.
Looks good. Thanks for working the edits. Marking this approved. Ktin (talk) 21:45, 20 October 2021 (UTC)
To T:DYK/P3 without image
Article meets eligibility criteria. Was recently promoted to GA. I will lean heavily on the due-diligence done during the GA promotion process. Taking the hook citation from the reference. The image is used in the article and looks reasonable. I find the hook interesting, though it is a matter of personal preference. I do not see a QPQ. Please share that once done. Ktin (talk) 20:09, 16 October 2021 (UTC)
