The #Artemis stack on the pad in a good image from the ISS: https://x.com/Astro_ChrisW/status/2018365716181705015 - processed with IrfanView, using AutoAdjustColors and contrast adjustment. Meanwhile the Wet Dress Rehearsal is in trouble because of - you guessed it - a hydrogen leak. Since the updates on https://www.nasa.gov/blogs/missions/ have become super-sparse it's hard to tell how serious the problem is.
Die #Kernfusionskollektoranlage hat heute 0,674 kWh Energie eingefangen.
Gesamtleistung: 480 Wp
Ausrichtung: West
Anstellwinkel: 58 Grad
Diese #Balkonsolaranlage wurde durch das Berliner SolarPLUS-Programm gefördert.
Einspeiseverlust: 4.41 %
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
Alportel, Speyer, Germany, 2020 by me
#fensterfreitag
Curious story: a combination of the Streisand Effect, and a conviction that he knows the law better than the judge and coroner that is worthy of Enoch Burke. #mastodaoine
wiki_science: Wikipedia Map of Science (2020)
A network of scientific fields, extracted from the English Wikipedia in early 2020. Nodes are wikipedia pages representing natural, formal, social and applied sciences, and two nodes are linked if the cosine similarity of the page content is above a threshold. See <http://www.s…
Similar vibe to the first week of March 2020 when people were wondering why the government hadn’t given clear instructions regarding the obviously pending crisis.
On Website Technicals (2020-11) - Tech updates: work storage, Let's Encrypt auto-renew, lazy wins, slow https switch, AMP https only, soft canonical, Apple touch, Apache stop, ad sub. - https://m.earth.org.uk/note-on-site-technicals-42.html
from my link log —
The largest city in each 10x10 degree latitude/longitude box.
https://blog.plover.com/2020/06/24/#boundary-conditions
saved 2020-06-24
Information regarding the health of the justices, is often difficult to obtain.
The Supreme Court’s public information office previously declined to reveal that
Chief Justice John Roberts had fallen at a country club near his suburban Maryland home in June 2020,
injured his head and taken by ambulance to a hospital until it was reported by the Washington Post.
If Alito were to decide to step down, the opening would offer President Donald Trump a fourth appointment to…
The transformation is nearly complete. #KristiNoem
How Theia, a satellite imaging startup that raised $250M by 2020, collapsed after the founder and four other execs were indicted on federal fraud charges (Brent Crane/Bloomberg)
https://www.bloomberg.com/news/features/2026-03-25/sat…
Heute vor 6 Jahren: Am 23. Januar 2020 stellte das "Bulletin of the Atomic Scientists" die #Weltuntergangsuhr auf 100 Sekunden vor 12 - so nah wie nie zuvor. Als Gründe nannten die beteiligten Wissenschaftler die politischen Lage sowie das Voranschreiten des Klimawandels.
The Republican former lieutenant governor of North Carolina,
Mark Robinson,
has admitted he "misled" voters during his unsuccessful 2024 gubernatorial campaign
when he denied posting racist and offensive comments on a pornography website
– suggesting he did so to protect Donald Trump’s successful presidential run.
Robinson, who worked in furniture manufacturing before entering politics in 2020, told the "After the Call" podcast on Thursday: