Tootfinder

Trilevel Memetic Algorithm for the Electric Vehicle Routing Problem
Ivan Milinovi\'c, Leon Stjepan Uroi\'c, Marko {\DJ}urasevi\'c
https://arxiv.org/abs/2506.01065

Trilevel Memetic Algorithm for the Electric Vehicle Routing Problem
The Electric Vehicle Routing Problem (EVRP) extends the capacitated vehicle routing problem by incorporating battery constraints and charging stations, posing significant optimization challenges. This paper introduces a Trilevel Memetic Algorithm (TMA) that hierarchically optimizes customer sequences, route assignments, and charging station insertions. The method combines genetic algorithms with dynamic programming, ensuring efficient and high-quality solutions. Benchmark tests on WCCI2020 inst…

from my link log —
Sneak peek: A new ASN.1 API for Python.
https://blog.trailofbits.com/2025/04/18/sneak-peek-a-new-asn.1-api-for-python/
saved 2025-04-18

Sneak peek: A new ASN.1 API for Python
We’re working on integrating an ASN.1 API into PyCA Cryptography, built on top of the same Rust ASN.1 implementation already used by Cryptography’s X.509 APIs.

$^{229}$Th Nuclear Spectroscopy in an Opaque Material: Laser-Based Conversion Electron M\"ossbauer Spectroscopy of $^{229}$ThO$_2$
Ricky Elwell, James E. S. Terhune, Christian Schneider, Harry W. T. Morgan, Hoang Bao Tran Tan, Udeshika C. Perera, Daniel A. Rehn, Marisa C. Alfonso, Lars von der Wense, Benedict Seiferle, Kevin Scharl, Peter G. Thirolf, Andrei Derevianko, Eric R. Hudson

Equivalence of Left- and Right-Invariant Extended Kalman Filters on Matrix Lie Groups
Finn G. Maurer, Erlend A. Basso, Henrik M. Schmidt-Didlaukies, Torleiv H. Bryne
https://arxiv.org/abs/2506.01514

Equivalence of Left- and Right-Invariant Extended Kalman Filters on Matrix Lie Groups
This paper derives the extended Kalman filter (EKF) for continuous-time systems on matrix Lie groups observed through discrete-time measurements. By modeling the system noise on the Lie algebra and adopting a Stratonovich interpretation for the stochastic differential equation (SDE), we ensure that solutions remain on the manifold. The derivation of the filter follows classical EKF principles, naturally integrating a necessary full-order covariance reset post-measurement update. A key contribut…

What was 1946 and close to eight decades of settler colonialism, apartheid, ethnic cleansing, and now genocide, asshole?
#israel #genocide #ethnicCleansing

Marsha P. Johnson has become an icon of gay, trans, and queer liberation,
and yet little is known about her life beyond her participation in the Stonewall Uprising of 1969 and the decades long controversy after her lifeless body was found floating in the Hudson River in 1992.
In "Marsha: The Joy and Defiance of Marsha P. Johnson",
Tourmaline, an award-winning Black trans artist, filmmaker, and activist who has dedicated her life to uplifting Marsha P. Johnson’s l…

What We Can Learn From the Defiant Life and Legacy of Marsha P. Johnson
Black trans artist, filmmaker, and activist Tourmaline discusses her new book about Marsha’s trailblazing life.

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Trilobite tridents: hydrodynamic lift and stability mechanisms for queue formation
Hugh A. Trenchard, Carlton E. Brett, Matjaz Perc
https://arxiv.org/abs/2506.15922

Trilobite tridents: hydrodynamic lift and stability mechanisms for queue formation
The bizarre trident-like cephalic projections of Walliserops trifurcatus have previously been interpreted as sexually selected weapons for intraspecific combat. We propose an alternative hypothesis grounded in biomechanics and collective behavior, that tridents evolved as adaptations for hydrodynamic lift and queue stability, conferring energetic advantages during group locomotion. Under this hypothesis, lift could offset gravitational forces, enabling greater locomotor efficiency, while mechan…

Extensive Database of Spatial Ballistic Captures with Application to Lunar Trailblazer
Lorenzo Ano\`e, Roberto Armellin, Gregory Lantoine, Claudio Bombardelli
https://arxiv.org/abs/2506.09584

Extensive Database of Spatial Ballistic Captures with Application to Lunar Trailblazer
For low-energy missions to the Moon and beyond, Ballistic Capture has proven to be a valuable technique for enabling orbital insertion while alleviating propulsion system requirements. This approach offers two key advantages. First, it extends the insertion window, allowing multiple maneuver opportunities to mitigate potential failures at the nominal insertion point. Second, it enables the required insertion maneuver to be distributed across multiple revolutions, reducing propulsion system cons…

Concept of the UCN Source at the WWR-K Reactor (AlSUN)
Sayabek Sakhiyev, Kylyshbek Turlybekuly, Asset Shaimerdenov, Darkhan Sairanbayev, Avganbek Sabidolda, Zhanibek, Kurmanaliyev, Akzhol Almukhametov, Olzhas Bayakhmetov, Ruslan Kiryanov, Ekaterina Korobkina, Egor Lychagin, Alexey Muzychka, Valery Nesvizhevsky, Cole Teander, Pham Khac Tuyen
https:/…

Concept of the UCN Source at the WWR-K Reactor (AlSUN)
We present the concept of the ultracold neutron (UCN) source with a superfluid helium-4 converter located in the thermal column of the WWR-K research reactor at the Institute of Nuclear Physics (INP) in Almaty, Kazakhstan. The conceptual design is based on the idea of accumulating UCNs in the source and effectively transporting them to experimental setups. We propose to improve the UCN density in the source by separating the heat and the UCN flows from the production volume and decreasing both,…