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Stephen Sekula

@steve.mastodon.cooleysekula.net.ap.brid.gy

#Astrophysicist and #ParticlePhysicist. #SNOLAB Research Group Manager, #Professor at Queen's University. I live and work in #Sudbury, #Ontario [โ€ฆ] ๐ŸŒ‰ bridged from https://mastodon.cooleysekula.net/@steve on the fediverse by https://fed.brid.gy/

66 Followers  |  23 Following  |  558 Posts  |  Joined: 20.10.2024  |  2.3855

Latest posts by steve.mastodon.cooleysekula.net.ap.brid.gy on Bluesky

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็พŽๅ›ฝๅฐ†้‡ๆ–ฐ็ผ–ๅ†™ๅ…ถ่ฟ‡ๅŽป็š„ๅ›ฝๅฎถๆฐ”ๅ€™ๆŠฅๅ‘Šใ€‚ US to rewrite its past national climate reports (www.france24.com) 18:02ย ย โ†‘ 119 HN Points

France24 is reporting that the US government will retroactively change its climate reports, altering both history and scientific consensus and consilience.

https://www.france24.com/en/live-news/20250807-us-to-rewrite-its-past-national-climate-reports

#damage #antiscience

08.08.2025 16:12 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Trunk & Tidbits, July 2025 Itโ€™s time for another recap of project progress, particularly from the engineering side of the team. Welcome! ## News In July, we announced that weโ€™d be running a donation campaign in our mobile apps, visible to people on the `mastodon.social` and `mastodon.online` servers. This is an exploratory step, as we look at different ways to grow our funding. In the future we plan to extend this to the web, and (longer term) we have a plan to make this banner feature available to the operators of other Mastodon servers as well. ## Releases At the start of August (just before publishing this update) we released version 4.4.3, along with 4.3.11, and 4.2.24. These are the _current, recommended releases_. These releases contain bugfixes, a fix for a moderate severity rate limit issue, and a fix for a security issue if you use SAML. In version 4.4.3 there are also changes to how quote posts are handled, as we continue to work towards full support for quote posts in the next main release (see below for more on this). During July we also released version 4.4.2, 4.3.10, and 4.2.23. You can find the full list of changes for these by checking their entries in the release notes. We recommend that all server operators upgrade to the latest point release for the main version they are running, to stay up-to-date with fixes and to provide people with the best available experience. We announce new version releases via our @MastodonEngineering account. ## Backend and Web This month, we made a lot of progress on quote posts. We finalised designs for quote post authoring and settings, considering ways to provide both creative freedom and privacy with this new feature. Backend work on quote posts authoring is underway. We are also working on adding Starter Packs to Mastodon, with early interface and ActivityPub exploration done in the last few weeks. We are planning to publish a feature explainer detailing our decisions (for example, how to let users control if they want to be included in a Starter Pack) in the coming weeks, and will share a Fediverse Enhancement Proposal (FEP) so that they can be implemented in other ActivityPub-based software. Other technical work is moving along. We are refactoring our Emoji code, and beginning a rework of the way we write stylesheets, to make them more tuned for performance, and more future-proof. * interface Work is in progress to replace Mastodonโ€™s emoji handling code to improve performance and avoid loading a lot of unused emoji data โ€” PR #35229 (by ChaosExAnima) โ€” PR #35282 (by ChaosExAnima) โ€” PR #35253 (by ChaosExAnima) โ€” PR #35424 (by ChaosExAnima) โ€” PR #35505 (by ChaosExAnima) โ€” PR #35568 (by ChaosExAnima) * interface Rewrote the keyboard shortcut code to remove an unmaintained dependency โ€” PR #35425 (by diondiondion) * interface Added the ability for the web interface to automatically fetch replies from other servers and show a button if there are new ones โ€” PR #35210 (by Gargron) โ€” PR #35575 (by Gargron) * interface Started to add quote posts authoring (behind a feature flag). This is API-only for now, and still being worked on. โ€” PR #35355 (by ClearlyClaire) โ€” PR #35578 (by ClearlyClaire) * interface Updated the design of quote posts to align with our latest design โ€” PR #35584 (by Gargron) * backend Updated trending statuses criteria to account for quote posts (a post with a quote can only trend if the quoted post is allowed for trending) โ€” PR #35507 (by ClearlyClaire) * admin Added the ability to block specific usernames from registering. This handles homoglyphs, partial matches, and either require approval, or deny registration entirely. โ€” PR #35407 (by Gargron) โ€” PR #35614 (by ClearlyClaire) ## Android Fixed some minor bugs and started working on displaying quote posts. ## iOS Finished work on 2025.04, including: * Navigations should no longer look broken (fixes #1448) * Editing a post now gives the same progress indication as publishing a post for the first time (filling up the button) * Efficiency improvements to avoid the โ€œtoo many requestsโ€ error (fixes #1449) Behind-the-scenes, there is work in progress to completely rework the way posts and timelines are handled. ## Community We spotted a couple of interesting new app releases this month. * toot, a text-based UI (TUI) for Mastodon, hit version 0.49.0 * Tuba, a GNOME / GTK client (Linux), had what OMG Ubuntu called โ€œa huge updateโ€ As a reminder: if youโ€™re building something cool, fun, unusual, or useful on Mastodon or using the Mastodon API, let us know, so we can share it here! ## Wrapping up Thatโ€™s all for another month of progress. Weโ€™re very grateful to everyone supporting us, as we work to make the social web a better place to be. Thank you. ### Thank you for supporting Mastodon We develop and maintain the free and open-source software that powers the social web. There is no capital behind thisโ€”we rely entirely on your support through platforms like Patreon. Donate on Patreon Donate directly View our sponsors

In July, the team made great progress on several features planned for the next major release, and tackled some refactoring tasks.

Take a look behind the scenes in our latest #TrunkAndTidbits update ๐Ÿ‘€

https://blog.joinmastodon.org/2025/08/trunk-tidbits-july-2025/

07.08.2025 22:07 โ€” ๐Ÿ‘ 3    ๐Ÿ” 38    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Original post on mastodon.social

We just released Mastodon 4.4.3, 4.3.11, and 4.2.24.

These versions contain bugfixes, and a fix for a security issue if you use SAML. In 4.4.3 there are also changes to how quote posts are handled, as we continue to work towards full support for quote posts in the next main release.

Full [โ€ฆ]

05.08.2025 16:02 โ€” ๐Ÿ‘ 0    ๐Ÿ” 10    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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The Canadian Astroparticle Summer Student Talk (CASST) Symposium is taking place on August 12th and August 13th. The deadline to submit an abstract has been extended until Friday, August 9th. For more information and to register, visit here: indico.snolab.ca/event/32/ove....

05.08.2025 18:00 โ€” ๐Ÿ‘ 0    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

With the launch of Ghost 6.0, every publication that runs on Ghost becomes part of the #fediverse. You can follow and comment on Platformer or 404 Media articles without leaving your Mastodon feed. This is the future of social media.

Congratulations to @johnonolan and all the team at Ghost!

04.08.2025 14:14 โ€” ๐Ÿ‘ 26    ๐Ÿ” 38    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Tonight's evening reading.

#tuberculosis #history #medicine #bookstodon

04.08.2025 21:58 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

The wildfire smoke from the Prairies is really thick today. The sun is 45 degrees above the horizon and still reddish in colour.

03.08.2025 12:19 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Original post on aus.social

For anyone who has no idea what I'm talking about but is interested anyway, almost 3 years ago I starting trying to design from scratch 3D printed model rockets to carry a small video camera and altitude logger while remaining as small and light a possible.

I spent quite a bit of time fiddling [โ€ฆ]

03.08.2025 09:49 โ€” ๐Ÿ‘ 0    ๐Ÿ” 2    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0

Scientists slam Trump administration climate report as a โ€˜farceโ€™ full of misinformation | Trump administration | The Guardian https://www.theguardian.com/us-news/2025/aug/01/trump-epa-climate-change-report

#damage #antiscience

03.08.2025 00:09 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Thanks everyone, itโ€™s been fun being a scientist in the US. ๐Ÿ‘‹

https://www.theatlantic.com/science/archive/2025/07/science-empire-america-decline/683711/?gift=PRmDi5DE0il7xqmlk54MFDvRYBZYWpAhq9ZHSXMN0YY

02.08.2025 20:57 โ€” ๐Ÿ‘ 1    ๐Ÿ” 38    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0

Learn about "Astronomy without Light" from the official recording of my keynote at the 2025 #Stellafane Convention!

https://youtube.com/watch?v=wBdbYmXwjFs&si=GurgypOvkU7s8i2a

02.08.2025 20:27 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Globe2Go, the digital newspaper replica of The Globe and Mail Globe2Go, the digital newspaper replica of The Globe and Mail

Europe is breaking reliance on U.S. science (The Globe and Mail (Ontario Edition)), Aug 02, 2025
https://globe2go.pressreader.com/article/281719800645785

02.08.2025 11:25 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Original post on mastodon.cooleysekula.net

Opinion: The White House wants to control universities (The Globe and Mail (Ontario Edition)), Aug 01, 2025
https://globe2go.pressreader.com/article/281732685545615

โ€œThe โ€ฆ administration has demonstrated time and time again that it is interested in neither the advancement of knowledge nor the [โ€ฆ]

01.08.2025 09:51 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

do any of you have organizations in your city that help people install Linux on old unused computers to give the hardware a new life? would love a link to their website!

also curious about what people end up using the machines for in practice, especially if theyโ€™re used by non-programmers

31.07.2025 17:12 โ€” ๐Ÿ‘ 14    ๐Ÿ” 83    ๐Ÿ’ฌ 18    ๐Ÿ“Œ 0
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Bear! That was a nice way to end the day!

31.07.2025 20:37 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Globe2Go, the digital newspaper replica of The Globe and Mail Globe2Go, the digital newspaper replica of The Globe and Mail

PHYSICIST HELPED PUT CANADA AT THE FOREFRONT OF QUANTUM COMPUTING (The Globe and Mail (Ontario Edition)), Jul 30, 2025
https://globe2go.pressreader.com/article/282200836976294

30.07.2025 10:47 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

SNOLAB recently had the great opportunity to welcome some talented amateur and professional photographers into our lab space. This initiative, allowed the photographers to see our science through their lens and frame the science we do each with their unique style.

๐Ÿงต [1/3]

29.07.2025 17:49 โ€” ๐Ÿ‘ 1    ๐Ÿ” 1    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Breezy Hill with the Porter Observatory in the foreground and the pink Stellafane clubhouse in the background at the top of the hill.

Breezy Hill with the Porter Observatory in the foreground and the pink Stellafane clubhouse in the background at the top of the hill.

The Porter Observatory with the mirror in position and the sun overhead.

The Porter Observatory with the mirror in position and the sun overhead.

The focusing mirror sits in place at the end of a long boom arm and concentrates the sunโ€™s rays into the main observatory to form an image.

The focusing mirror sits in place at the end of a long boom arm and concentrates the sunโ€™s rays into the main observatory to form an image.

A view of the sun through a solar telescope. Sunspots are visible, each as large as or larger than the Earth.

A view of the sun through a solar telescope. Sunspots are visible, each as large as or larger than the Earth.

Some scenes from Breezy Hill at the #Stellafane Convention regarding the use of the beautiful Porter Observatory for solar observing in the daytime. Our sun is the first star in our lives, and being able to see the features of its outer surface [โ€ฆ]

[Original post on mastodon.cooleysekula.net]

29.07.2025 02:12 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
A person talking to an audience in front of a projected slide.

A person talking to an audience in front of a projected slide.

A person lecturing in an outdoor amphitheatre with slides projected on a large screen

A person lecturing in an outdoor amphitheatre with slides projected on a large screen

A person interacts with an audience in an outdoor amphitheatre.

A person interacts with an audience in an outdoor amphitheatre.

I had a TRASNFORMATIVE time at the #Stellafane Convention these past few days. I am back in #Sudbury now but my heart remains with the passionate community of telescope makers and astronomers I met and learned from.

I was honoured to give the [โ€ฆ]

[Original post on mastodon.cooleysekula.net]

28.07.2025 01:40 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Shout out to @WestportObservatory at #Stellafane: I am having a wonderful time learning about the Westport Astronomical Society and the observing facilities they manage and support. So happy to be able to connect with all of you IRL instead of just on the #fediverse!

26.07.2025 18:40 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Original post on mastodon.cooleysekula.net

Stellafane Questions: What is the Mass of all Neutrinos from a Core-Collapse Supernova?

This answer is for Alan. After my keynote talk at the Hartness House Workshop last night, he approached me with a really interesting question. What is the total mass of the neutrinos emitted by a [โ€ฆ]

25.07.2025 13:06 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Tunnels below the house lead to private rooms for Hartnessโ€™s work.

Tunnels below the house lead to private rooms for Hartnessโ€™s work.

Astronomy equipment in a subterranean museum

Astronomy equipment in a subterranean museum

Hartnessโ€™s custom designed and built telescope

Hartnessโ€™s custom designed and built telescope

The tunnels exit on the back side of the property, below ground level.

The tunnels exit on the back side of the property, below ground level.

We had a chance to tour the Hartness House museum during lunch yesterday. Itโ€™s housed in the tunnels under the mansion/inn, built by Hartness (former governor of VT and a talented engineer and astronomer). The tunnels were home to a workshop and [โ€ฆ]

[Original post on mastodon.cooleysekula.net]

25.07.2025 11:46 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Original post on mastodon.cooleysekula.net

I was very honoured to deliver the keynote talk at the HHW last night. The questions afterward were incredible, and @jodi and I were humbled when a young member of the audience asked us to sign his copy of our dark matter textbook that he brought with him to the talk.

We went out after the [โ€ฆ]

25.07.2025 11:38 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Original post on mastodon.cooleysekula.net

It has been an incredible time so far with the community of telescope makers at this yearโ€™s Stellafane Convention, and the convention is just starting today!

Yesterday was the Hartness House Workshop, a chance to engage with many people about their passion for astronomy and to learn from [โ€ฆ]

25.07.2025 11:35 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0
Original post on mastodon.social

We just released Mastodon 4.4.2, 4.3.10, and 4.2.23.

These versions all contain some internal Ruby dependency updates for security. Version 4.4.2 also includes some fixes, primarily for user interface issues.

Full release notes and update instructions are available on the GitHub releases page [โ€ฆ]

23.07.2025 15:16 โ€” ๐Ÿ‘ 5    ๐Ÿ” 34    ๐Ÿ’ฌ 4    ๐Ÿ“Œ 0
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I am very excited to be participating in the annual #Stellafane Convention in Springfield, VT. We arrived at the Hartness House last night, site of the Thursday Hartness House Workshop. I will deliver a lecture on doing supernova science in [โ€ฆ]

[Original post on mastodon.cooleysekula.net]

23.07.2025 13:41 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Accomplished one of my long-standing #running goals today: to run from my family home into the back entrance of the state park in town. I realized on this trip that this run was well within my current abilities (a 5K, including running inside the [โ€ฆ]

[Original post on mastodon.cooleysekula.net]

22.07.2025 18:49 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Original post on mastodon.cooleysekula.net

The curious case of the gift card

I am presently back in the US on a short vacation before heading to Vermont to participate in the Stellafane Convention. In what has been an intense and extremely busy year, this has been a few days of much needed rest and peace. After exercising in a state [โ€ฆ]

22.07.2025 12:21 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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The Canadian Astroparticle physics Summer Student Talk (CASST) symposium is coming up! The competition will take place on August 12th and 13th in a hybrid format. Registration and abstract submissions are now open! Register and find more details here: indico.snolab.ca/event/32/ove...

21.07.2025 18:50 โ€” ๐Ÿ‘ 2    ๐Ÿ” 1    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Ah, time off. Enjoying a morning run in a state park for the last 3 days. It has been nice to get more exercise and enjoy the outdoors.

21.07.2025 16:09 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

@steve.mastodon.cooleysekula.net.ap.brid.gy is following 20 prominent accounts