Recording of Monday's SpaceX #Crew12 Prelaunch News Conference: https://www.youtube.com/watch?v=I12pFrHAuQI - see also https://www.nasa.gov/blogs/spacestation/2026/02/09/nasa-spacex-adjust-crew-12-launch-date-due-to-weather/ for how weather predictions for a specific area led to a launch delay of at least one day.
Approximate Cartesian Tree Matching with Substitutions
Panagiotis Charalampopoulos, Jonas Ellert, Manal Mohamed
https://arxiv.org/abs/2602.08570 https://arxiv.org/pdf/2602.08570 https://arxiv.org/html/2602.08570
arXiv:2602.08570v1 Announce Type: new
Abstract: The Cartesian tree of a sequence captures the relative order of the sequence's elements. In recent years, Cartesian tree matching has attracted considerable attention, particularly due to its applications in time series analysis. Consider a text $T$ of length $n$ and a pattern $P$ of length $m$. In the exact Cartesian tree matching problem, the task is to find all length-$m$ fragments of $T$ whose Cartesian tree coincides with the Cartesian tree $CT(P)$ of the pattern. Although the exact version of the problem can be solved in linear time [Park et al., TCS 2020], it remains rather restrictive; for example, it is not robust to outliers in the pattern.
To overcome this limitation, we consider the approximate setting, where the goal is to identify all fragments of $T$ that are close to some string whose Cartesian tree matches $CT(P)$. In this work, we quantify closeness via the widely used Hamming distance metric. For a given integer parameter $k>0$, we present an algorithm that computes all fragments of $T$ that are at Hamming distance at most $k$ from a string whose Cartesian tree matches $CT(P)$. Our algorithm runs in time $\mathcal O(n \sqrt{m} \cdot k^{2.5})$ for $k \leq m^{1/5}$ and in time $\mathcal O(nk^5)$ for $k \geq m^{1/5}$, thereby improving upon the state-of-the-art $\mathcal O(nmk)$-time algorithm of Kim and Han [TCS 2025] in the regime $k = o(m^{1/4})$.
On the way to our solution, we develop a toolbox of independent interest. First, we introduce a new notion of periodicity in Cartesian trees. Then, we lift multiple well-known combinatorial and algorithmic results for string matching and periodicity in strings to Cartesian tree matching and periodicity in Cartesian trees.
toXiv_bot_toot
NASA’s #Arcstone instrument, designed to improve the accuracy of lunar calibration, successfully completed its technology demonstration, and now begins extended operations: https://www.nasa.gov/blogs/smallsatellites/2026/01/28/nasas-arcstone-instrument-successfully-completes-primary-mission/ - Arcstone launched on June 23 on a SpaceX Transporter-14 from Vandenberg Space Force Base in California, on a six-month mission to measure light reflected by the Moon, which is a stable and potentially highly-accurate calibration source, for satellite sensors
Isotopic evidence for volatile loss driven by South Pole-Aitken basin–forming impact: #Moon Is Asymmetrical: https://eos.org/articles/primordial-impact-may-explain-why-the-moon-is-asymmetrical - analysis of surface samples from the Chang’e-6 mission suggests that an asteroid may have vaporized parts of the lunar mantle, suppressing volcanic activity on the farside of the Moon.
The median home buyer is 59 years old.
That may sound like a shocking statistic, but it’s part of a trend.
In 2020, the median home buyer was 47 years old, which at the time was also an all-time high.
Here’s another shocking statistic:
The median down payment on a house in 2025 for first time homebuyers surpassed $40,000
— exceeding the median net worth of Americans under 35.
Americans once went in search of their starter homes in their 20s,
but …
Kollegin A., die 2020 pandemiebedingt einige Monate in Indien gestrandet war, ist erneut in Indien. Ihr für gestern geplanter Rückflug nach Wien über Dubai, nun ja. Sie wird versuchen, über Japan (woher sie kommt) nach Europa zurückzukehren.
from my link log —
PostgresqlCO.NF: a PostgreSQL configuration guide.
https://postgresqlco.nf/
saved 2020-02-02 https://dotat.at/:/V3K8F.html
And here is my published dissertation @…, about quantifying the natural CO2 exhaust at the Starzach site in Southwest Germany (my result: ~10t/d):
http://hdl.handle.net/10900/176213…
KPMG citing PitchBook data: UK fintech investment totaled almost $11B in 2025 across 418 deals, down from ~$13.4B in 2024 across 527 deals; Revolut raised $4B (Aisha S Gani/Bloomberg)
https://www.bloomberg.com/news/articles/20…
The Georgian Surrogacy
Initially created by two Australian Mum's who navigated the complicated world of doing surrogacy in Tbilisi, Georgia during Covid in 2020...
Great Australian Pods Podcast Directory: https://www.greataustralianpods.com/georgian-surrogacy/…
Pro-Trump activists who say they are in coordination with the White House
💥are circulating a 17-page draft executive order that claims China interfered in the 2020 election
🔥as a basis to declare a national emergency that would unlock extraordinary presidential power over voting.
Trump has repeatedly previewed a plan to mandate voter ID and ban mail ballots in November’s midterm elections,
⚠️and the activists expect their draft will figure into Trump’s promised ex…
I recently got a “new” iPad (meaning, a used model from 2020) and I was amazed at how terrible it was for web browsing. Then I realized I forgot to point it at my Pi-hole install for DNS.
So much of the (commercial) web is nearly unusable on old(er) devices because of the amount of advertising crammed onto a page.
(Indie sites personal blogs, etc are mostly unaffected. Recipe sites though… whew!)
#web
Leistung der installierten #Windkraftanlagen pro Jahr in #Deutschland mit Stand vom 10.03.2026.
Der Datenbestand enthält ggf. unplausible Datensätze.
👉 Zusatzlesestoff: 14 Tipps zum #Energiesparen
from my link log —
UK public transport API.
https://www.transportapi.com/
saved 2020-02-26 https://dotat.at/:/ZF2L4.html
I think the biggest disconnect between the left and the masses right now is that the left is saying "ah man if only the people were class concious then we could actually accomplish something" and I'm like my sibling in Christ they are already class concious, they fight for every movement that's in their interests, did you not see BLM in 2020 or the anti-ICE protests today
"Plötzlich Wissen!" ist ein guerilla #WissKomm Projekt von Dr. Julia Schnetzer, Inga Marie Ramcke und mir, gestartet in 2017 (Wissenschaftsjahr 2016*17 Meere und Ozeane), das sich zur Pandemie auf online verlegen musste, einiges hin & her hinter sich hat und immernoch läuft. Heute kam unser Paper darüber raus, im Journal of Science Communication, Sonderedition "
When DHS, USCIS, and DOGE announced the overhaul of the SAVE program,
they explicitly linked the effort to a campaign to combat the “taint” of noncitizen voter fraud,
a long-standing claim tied to the lie that the 2020 presidential election was stolen.
By all appearances, the administration is poised to use the SAVE program to prop up these false claims,
and sympathetic local officials may deploy SAVE to concoct evidence.
This move poses serious risks to vo…
Metacast 2: Podcast Specs and Workflow (2020-04) - Another podcast episode about podcasting - documenting for consistency. - https://www.earth.org.uk/metacast-2.html
Anzahl der Inbetriebnahmen von #Balkonkraftwerken pro Monat in #Deutschland mit Stand vom 10.03.2026.
Unplausible Inbetriebnahmejahre von 1900 bis 2017 wurden durch das Registrierungsdatum der
The FBI raided an elections office in Georgia
and seized ballots from the 2020 presidential election
in connection with a federal investigation into
“deficiencies or defects” into Donald Trump’s loss in the state, according to newly unsealed documents.
An affidavit for the search signed by a judge last month reveals that
the investigation followed a referral from Trump’s former campaign-linked attorney
An F.B.I. search warrant affidavit unsealed on Tuesday shows that
a criminal investigation into 2020 election results in Fulton County, Ga.,
was set off by a leading election denier in the Trump administration
and relied heavily on claims about ballots that have been widely debunked.
The unsealing of the affidavit in Fulton County is likely to raise more questions
about the Trump administration’s use of the F.B.I. and Justice Department to revive old, largely di…
Anzahl der #Batteriespeicher je #Batterietechnologien in #Deutschland mit Stand vom 17.03.2026.
3124 nicht aktive und 0 Batteriespeicher ohne Inbetriebnahmedatum wurden a…
A search warrant affidavit unsealed on Tuesday reveals that
when the FBI raided the Fulton county election office in Georgia last month,
the decision was based on debunked claims from election deniers
and came after a referral from a White House lawyer who tried to overturn the 2020 election.
The FBI’s investigation “originated” from a referral sent by
Kurt Olsen, an attorney who sought to overturn the 2020 election
and contacted justice department offici…
from my link log —
T1: a programming language for constrained environments, derived from BearSSL.
https://t1lang.github.io/
saved 2020-01-11 https://dotat.at/…
COVID may have killed significantly more people in the U.S. in the first two years of the pandemic than official records indicate, with as many as one overlooked death for every five recorded ones. That brings the total to nearly one million deaths just in 2020 and 2021.
That calculation comes from research published today in Science Advances that seeks to understand how many COVID deaths fell through the cracks of official reporting systems. The untallied cases show the burden of the …
from my link log —
Nornir: an automation framework in Python.
https://nornir.readthedocs.io/en/latest/
saved 2020-03-23 https://dotat.a…
from my link log —
Capability-based computer systems. (1984)
https://homes.cs.washington.edu/~levy/capabook/
saved 2020-03-08 https://