Tootfinder

Paris goal of 1.5°C warming is still too hot for polar ice sheets, study warns https://news.mongabay.com/short-article/2025/06/paris-goal-of-1-5c-warming-is-still-too-hot-for-polar-ice-sheets-study-warns/

Paris goal of 1.5°C warming is still too hot for polar ice sheets, study warns
At the landmark Paris climate agreement, nearly every country in the world pledged to a goal to limit warming to well below 2° Celsius (3.6° Fahrenheit) above preindustrial levels by 2100, and work toward a more ambitious goal to limit warming to 1.5°C (2.7°F). The hope is that such a limit will help Earth avoid […]

Last-Pair Swapping Polar Codes: A Structure to Improve Polarization on Channels with Memory
Yinuo Mei, Yangyong Zhang, Daiming Qu
https://arxiv.org/abs/2506.11535

Last-Pair Swapping Polar Codes: A Structure to Improve Polarization on Channels with Memory
A new structure of polar codes is proposed for channels with memory to improve polarization and approach the polarization efficiency of conventional polar codes on memoryless channels. We classify trellis channels, a particular type of finite state channels into two categories, called sub-injective trellis channels and non-sub-injective trellis channels, where an explicit polarization loss is observed on the former. For sub-injective trellis channels, we substitute the last kernel of each layer…

heise | Polar Grit X2: Kompakte Sportuhr (nicht nur) für Frauen im Test
In der vergleichsweise zierlichen Grit X2 bringt Polar seine aktuellste Technik unter. Was taugt sie gegenüber Apple Watch & Co.?
h…

"Underwater curtains and reflective beads are ‘unrealistic and dangerous polar geoengineering ideas’"
#Geoengineering #Climate #ClimateChange

Joint Denoising of Cryo-EM Projection Images using Polar Transformers
Joakim And\'en, Justus Sagem\"uller
https://arxiv.org/abs/2506.11283 https:/…

Joint Denoising of Cryo-EM Projection Images using Polar Transformers
Deep neural networks~(DNNs) have proven powerful for denoising, but they are ultimately of limited use in high-noise settings, such as for cryogenic electron microscopy~(cryo-EM) projection images. In this setting, however, datasets contain a large number of projections of the same molecule, each taken from a different viewing direction. This redundancy of information is useful in traditional denoising techniques known as class averaging methods, where images are clustered, aligned, and then av…

Polarons in two-dimensional polar materials: All-coupling variational theory
A. Kudlis, V. Shahnazaryan, I. V. Tokatly
https://arxiv.org/abs/2507.10930 htt…

Polarons in two-dimensional polar materials: All-coupling variational theory
We present a detailed and self-contained theoretical study of polarons in two-dimensional (2D) polar materials, which extends the classical macroscopic theory of Fröhlich polarons to the 2D case. The theory is fully determined by experimentally accessible parameters, the static and optical 2D polarizabilities of a monolayer, the frequency of transverse optical phonons, and the effective mass of charge carriers. We define a single dimensionless parameter, which characterizes the coupling of ele…

Polar Loop: Displayfreies Wearable ohne Abo als mögliche Alternative zu Whoop
Der finnische Sportuhrenhersteller Polar hat mit dem Loop sein erstes Wearable ohne Display auf den Markt gebracht. Im Unterschied zu Whoop kommt es ohne Abo.

DocPolarBERT: A Pre-trained Model for Document Understanding with Relative Polar Coordinate Encoding of Layout Structures
Benno Uthayasooriyar, Antoine Ly, Franck Vermet, Caio Corro
https://arxiv.org/abs/2507.08606

DocPolarBERT: A Pre-trained Model for Document Understanding with Relative Polar Coordinate Encoding of Layout Structures
We introduce DocPolarBERT, a layout-aware BERT model for document understanding that eliminates the need for absolute 2D positional embeddings. We extend self-attention to take into account text block positions in relative polar coordinate system rather than the Cartesian one. Despite being pre-trained on a dataset more than six times smaller than the widely used IIT-CDIP corpus, DocPolarBERT achieves state-of-the-art results. These results demonstrate that a carefully designed attention mechan…

PLATOSpec's first results: planets WASP-35b and TOI-622b are on aligned orbits, and K2-237b is on a polar orbit
J. Zak, P. Kabath, H. M. J. Boffin, J. Liptak, M. Skarka, R. Brahm, P. Gajdo\v{s}, A. Bocchieri, D. Itrich, L. Vanzi, P. Pintr, J. Janik, A. Hatzes
https://arxiv.org/abs/2508.10145

PLATOSpec's first results: planets WASP-35b and TOI-622b are on aligned orbits, and K2-237b is on a polar orbit
The spin-orbit angle between a stellar spin axis and its planetary orbital axis is a key diagnostic of planetary migration pathways, yet the mechanisms shaping the observed spin-orbit distribution remain incompletely understood. Combining the spin-orbit angle with atmospheric measurements has emerged as a powerful method of studying exoplanets that showcases the synergy between ground- and space-based observations. We present the Rossiter-McLaughlin effect measurements of the projected spin-orb…

Radii of spherical timelike geodesics in Kerr-Newman black holes
Wei Huang, Jun-Xu Chen, Jia-Hui Huang
https://arxiv.org/abs/2506.11473 https://

Radii of spherical timelike geodesics in Kerr-Newman black holes
The existence, radii and radial stability of the equatorial and non-equatorial (particularly, the polar) spherical orbits are discussed for particles with different conserved energy. The radii of these orbits generally are solutions of a quintic polynomial equation with four dimensionless parameters. For the case with $γ=1$, we obtain the analytical expressions for the radii of the polar, equatorial and general orbits. The radial stability of the orbits outside the event horizon is also discus…

There's this fascination with what science is discovering about unexpected ecosystems, coupled with dismay at the changes we are causing without intent, thought, or (unfortunately) care. Until it's too late to stop what we are doing, to our own detriment

There's this fascination with what science is discovering about unexpected ecosystems, coupled with dismay at the changes we are causing without intent, thought, or (unfortunately) care. Until it's too late to stop what we are doing, to our own detriment

Interplay of polar order and positional order in liquid crystals -- observation of re-entrant ferroelectric nematic phase
Grant Strachan, Shona Ramsay, Marijus Juodka, Damian Pociecha, Jadwiga Szydlowska, John M. D. Storey, Natasa Vaupotic, Rebecca Walker, Ewa Gorecka
https://arxiv.org/abs/2507.08754

Interplay of polar order and positional order in liquid crystals -- observation of re-entrant ferroelectric nematic phase
We show that development of polar order may spontaneously destroy the lamellar structure of a liquid crystal. This results in an unusual sequence of phases with the ferroelectric nematic phase appearing below a non-polar smectic phase. The effect is related to unfavourable dipole interactions within the smectic layers and can be explained by Landau theory in which the temperature dependent term is non-monotonic as it is renormalized by spontaneous electric polarization.

Volcano-Like Ferroic Transitions Deviating from the Model of Landau Theory
Yuxuan Sheng, Menghao Wu
https://arxiv.org/abs/2507.11409 https://

Volcano-Like Ferroic Transitions Deviating from the Model of Landau Theory
We predict the existence of abnormal volcano-like temperature dependence of polarization or magnetization with maxima located at elevated temperature, distinct from classical model based on Landau theory. One case is ferroelectricity with long ion displacements and quantized polarizations that cannot be used for expansion in Landau model, and the switching pathway involves various metastable phases where the polar phase is higher both in energy and entropy compared with non-polar phase. Another…

Heh yes. Pretty much this.
"Much more will be written about proposals to build massive undersea walls to hold up Antarctic ice sheets, drill bore holes in Greenland to pump out lubricating meltwater, or scatter glass beads over glaciers. As informed and erudite I'm sure this will be, I don't think it will be as effective as simply yelling "What the hell do you think you are doing?!”"
@… reads through the lines and interprets our recent #Geoengineering paper into plain english in this entertaining blogpost
https://www.technosphere.earth/new-report-concludes-polar-geoengineering-is-dangerous/

Discovering the Unequal Importance of Coded Bits in the Decoding of Polar Codes
Hossam Hassan, Ali Gaber, Mohammed Karmoose, Noha Korany
https://arxiv.org/abs/2507.08598

Discovering the Unequal Importance of Coded Bits in the Decoding of Polar Codes
Polar codes are widely used in modern communication systems due to their capacity-achieving properties. This paper investigates the importance of coded bits in the decoding process of polar codes and aims to determine which bits contribute most to successful decoding. We investigate the problem via a brute-force search approach and surrogate optimization techniques to identify the most critical coded bits. We also demonstrate how mapping these important bits to the most reliable channels improv…

Hardware-friendly IR-HARQ for Polar SCL Decoders
Marwan Jalaleddine, Jiajie Li, Warren J. Gross
https://arxiv.org/abs/2508.08425 https://arxiv.org/pdf/2508…

Hardware-friendly IR-HARQ for Polar SCL Decoders
To extend the applications of polar codes within next-generation wireless communication systems, it is essential to incorporate support for Incremental Redundancy (IR) Hybrid Automatic Repeat Request (HARQ) schemes. The baseline IR-HARQ scheme's reliance on set-based operations leads to irregular memory access patterns, posing significant challenges for efficient hardware implementation. Furthermore, the introduction of new bit types increases the number of fast nodes that are decoded without t…

Data-independent Beamforming for End-to-end Multichannel Multi-speaker ASR
Can Cui, Paul Magron, Mostafa Sadeghi, Emmanuel Vincent
https://arxiv.org/abs/2509.10234 https://

Data-independent Beamforming for End-to-end Multichannel Multi-speaker ASR
Automatic speech recognition (ASR) in multichannel, multi-speaker scenarios remains challenging due to ambient noise, reverberation and overlapping speakers. In this paper, we propose a beamforming approach that processes specific angular sectors based on their spherical polar coordinates before applying an end-to-end multichannel, multi-speaker ASR system. This method is data-independent and training-free. We demonstrate that using a group of beamformed signals improves ASR performance compare…

Rotating twisted magnetosphere of magnetars: approximate analytical solutions
H. Tong, L. Chen
https://arxiv.org/abs/2509.10017 https://arxiv.org/pdf/2509.…

Rotating twisted magnetosphere of magnetars: approximate analytical solutions
An approximate analytical solution for the rotating twisted magnetosphere of magnetars is presented. The poloidal flux is approximated by the self-similar twisted dipole field. The toroidal field is obtained by the minimum torque model. Under this approximation, it is found that: (1) The Y-point radius decreases with the increase of twist of the magnetic field. (2) The polar cap is larger for larger twist. (3) The particle outflow luminosity is larger for larger twist. (4) The maximum accelerat…

SpiralMap: A Python library of the Milky Way's spiral arms
Abhay Kumar Prusty, Shourya Khanna
https://arxiv.org/abs/2506.11383 https://

SpiralMap: A Python library of the Milky Way's spiral arms
We present a library of the major spiral arm models (and maps) of the Galaxy. The package is written in Python, and allows the user to both extract the 2D trace and overplot the spiral arms in Cartesian/Polar coordinates in both Heliocentric (HC) and Galactocentric (GC) frames. The current version is a compilation of 8 models (and maps) covering a range of tracers (stars, gas). Other models can also be added upon request.

Karmic Historiography Forum on The Immanent Frame
https://ift.tt/GdFyLf6
University of Alaska - Fairbanks - Alaska & Polar Regions Area Studies Bibliographer & Curator of…
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The $m$-generalized right group inverses in Banach algebras
Huanyin Chen, Marjan Sheibani
https://arxiv.org/abs/2507.10600 https://ar…

The $m$-generalized right group inverses in Banach algebras
In this paper, we introduce the concept of the m-generalized right group inverse. This serves as a natural extension of both the m-weak group inverse and the generalized group inverse. We characterize this new generalized inverse using the m-generalized right group decomposition and a polar-like property. Additionally, we present the representation of the m-generalized right group inverse using the generalized right core inverse, leading to new insights and properties for both the m-weak group …

Co-existence of longitudinal and transverse oscillations in polar plumes observed with Solar Orbiter/EUI
Upasna Baweja, Vaibhav Pant, S. Krishna Prasad, Arpit Kumar Shrivastav, Tom Van Doorsselaere, Nancy Narang, Cis Verbeeck, M. Saleem Khan, David Berghmans
https://arxiv.org/abs/2509.07796

Co-existence of longitudinal and transverse oscillations in polar plumes observed with Solar Orbiter/EUI
Magnetohydrodynamic (MHD) waves play a key role in heating the solar corona and driving the solar wind. Recent observations have shown the presence of slow magneto-acoustic and Alfvénic waves in polar plumes and inter-plumes. However, a complete understanding of wave dynamics in the polar regions has long been limited by the lack of simultaneous, high-resolution observations. In this study, we utilize high spatial (210 km per pixel) and high cadence (5s) dataset from the Extreme Ultraviolet Im…

Polar launches the $199 Polar Loop, a screen-free fitness band to track activity, sleep, and more without a subscription, in three colors, shipping September 10 (Samantha Kelly/Bloomberg)
https://www.bloomberg.com/news/articles/20

Exploration on the Two-stream Instability in the Polar Cusp Under Solar Storm Disturbances and its Potential Impacts on Spacecraft
Jikai Sun, Lei Chang, Yu Liu, Guojun Wang, Zichen Kan, Shijie Zhang, Jingjing Ma, Dingzhou Li, Yingxin Zhao
https://arxiv.org/abs/2509.09126

Exploration on the Two-stream Instability in the Polar Cusp Under Solar Storm Disturbances and its Potential Impacts on Spacecraft
During solar storms, the polar cusp often exhibits electron populations with distinct velocity distributions, which may be associated with the two-stream instability. This study reveals the evolution of the two-stream instability associated with electron velocities and the interaction between the growth phase of the two-stream instability and the electrostatic solitary waves (ESWs). The results from particle-in-cell (PIC) simulations are compared with satellite observational data and computatio…

"It is clear to us that the assessed approaches are not feasible, and that further research into these techniques would not be an effective use of limited time and resources. It is vital that these ideas do not distract from the priority to reduce greenhouse gas (GHG) emissions or from the critical need to conduct fundamental research in the polar regions."
New paper out today led by Martin Siegert and ft. (on here) me and @… and about 40 others where we argue that some of the proposed #Polar #Geoengineering schemes are dangerous, misleading and unethical...
#AskMeAnything if you'd like to know more.
https://www.frontiersin.org/journals/science/articles/10.3389/fsci.2025.1527393/full
.

A novel IR-SRGAN assisted super-resolution evaluation of photothermal coherence tomography for impact damage in toughened thermoplastic CFRP laminates under room temperature and low temperature
Pengfei Zhu, Hai Zhang, Stefano Sfarra, Fabrizio Sarasini, Zijing Ding, Clemente Ibarra-Castanedo, Xavier Maldague
https://arxiv.org/abs/2509.10894…

A novel IR-SRGAN assisted super-resolution evaluation of photothermal coherence tomography for impact damage in toughened thermoplastic CFRP laminates under room temperature and low temperature
Evaluating impact-induced damage in composite materials under varying temperature conditions is essential for ensuring structural integrity and reliable performance in aerospace, polar, and other extreme-environment applications. As matrix brittleness increases at low temperatures, damage mechanisms shift: impact events that produce only minor delaminations at ambient conditions can trigger extensive matrix cracking, fiber/matrix debonding, or interfacial failure under severe cold loads, thereb…

Low-Latency Software Polar Encoders and Decoders for Short Blocklengths
Mathieu Leonardon (IMT Atlantique - MEE, Lab\_STICC\_BRAIn), Mohammed El Houcine Ayoubi (IMT Atlantique), Adrien Cassagne (ALSOC), Romain Tajan (Bordeaux INP, UB), Camille Leroux (Bordeaux INP, UB)
https://arxiv.org/abs/2507.04734

Low-Latency Software Polar Encoders and Decoders for Short Blocklengths
This paper presents our low-latency Polar code encoders and decoders developed for the 2025 International Symposium on Topics in Coding (ISTC 2025) contest, which challenges participants to implement the fastest possible channel code encoders and decoders in terms of average and maximum latency on a CPU target. Our solution is based on Polar codes with an Adaptive Successive Cancellation List (ASCL) decoder. We introduce a novel ASCL unrolled decoder generator. We conduct an extensive explorati…

The view south from my barn about a week and a half ago when the smoke from the wildfires in Canada was really bad and there was noticeable haze over even short sightlines -- what a relief when winds over the Midwest started heading north.
#photo #photography

Harnessing the polar vortex motion in oxide heterostructures
Pushpendra Gupta, Mohit Tanwani, Qi Xu, Guanshihan Du, Peiran Tong, Yongjun Wu, Zijian Hong, He Tian, Ramamoorthy Ramesh, Sujit Das
https://arxiv.org/abs/2509.06189

Harnessing the polar vortex motion in oxide heterostructures
Polar topology, an analogue of the magnetic topology, serves as a large playground for exotic physical phenomena with a wide range of multifunctional applications. Polar vortices and skyrmions are representative polar topologies that have been predicted to significantly enhance the functionality and information density of nanoelectronic devices due to their ultrasmall dimensions. Despite these advantages, the practical realization of polar topologies in devices is impeded by the intrinsic chall…

Call for Panelists: “Saints and the Environment”
https://ift.tt/6FeQbG2
University of Alaska - Fairbanks - Alaska & Polar Regions Area Studies Bibliographer & Curator of…
via Input 4 RELCFP

Fast Polarisation-Aware Decoder for Non-Binary Polar Codes
Joseph Jabbour, Ali Chamas Al-Ghouwayel, Emmanuel Boutillon
https://arxiv.org/abs/2509.09554 https://

Fast Polarisation-Aware Decoder for Non-Binary Polar Codes
The paper investigates the emerging field of low-complexity non-binary polar code (NB-PC) decoders. It shows that customizing each kernel of an NB-PC decoder through offline analysis can significantly reduce the overall decoding complexity. The proposed decoder, referred to as the Fast Successive Cancellation-Polarization Aware (FSC-PA) scheme, achieves this by minimizing the computational load of parity-check nodes that share the same level of input polarization. The NB polar decoder is develo…

Magnetic White Dwarf -- M Dwarf Binaries in Pre-polar Phase as Special Population of Long-Period Radio Transients
Yuan-Pei Yang
https://arxiv.org/abs/2509.09224 https://

Magnetic White Dwarf -- M Dwarf Binaries in Pre-polar Phase as Special Population of Long-Period Radio Transients
Long-period radio transients (LPTs) are a new class of coherent radio sources with periods ranging from minutes to hours. Recently, two LPT sources, ILT J1101+5521 and GLEAM-X J0704-37, with periods of 2-3 hours has been confirmed to originate from white dwarf (WD) -- M dwarf (MD) binaries. In this work, we propose that at least some LPTs originate from the magnetic WD -- MD binaries in the pre-polar phase. The asynchronism between the WD's rotation and the binary's orbital motion allows for th…

Response Theory for Static and Dynamic Solvation of Ionic and Dipolar Solutes in Water
Renjie Zhao, Richard C. Remsing, John D. Weeks
https://arxiv.org/abs/2508.06737 https://…

Response Theory for Static and Dynamic Solvation of Ionic and Dipolar Solutes in Water
The response of polar solvents to ions and polar molecules dictates many fundamental molecular processes. To understand such electrostatically-driven solvation processes, one ideally would probe the dielectric response of a solvent to an idealized point test charge or dipole solute, as envisioned in classic continuum treatments of the problem. However, this is difficult in simulations using standard atomically-detailed solvent models with embedded point charges due to possible overlap with the …

Entropy production in non-reciprocal polar active mixtures
Kim L. Kreienkamp, Sabine H. L. Klapp
https://arxiv.org/abs/2508.05209 https://arxiv.org/pdf/250…

Entropy production in non-reciprocal polar active mixtures
The out-of-equilibrium character of active systems is often twofold, arising from both the activity itself and from non-reciprocal couplings between constituents. A well-established measure to quantify the system's distance from equilibrium is the informatic entropy production rate. Here, we ask the question whether and how the informatic entropy production rate reflects collective behaviors and transitions in an active mixture with non-reciprocal polar couplings. In such systems, non-reciproca…

Dear Apple-hating replyguys posting from the hip, when I say “my 7-year old iPad Pro still works fine and I don’t see any reason to upgrade”—that’s actually the polar opposite of “planned obsolescence”.

Who wants tpo come and work with me and a brilliant group of polar scientists on the latest generation of #climate models and #EarthObservation data?
We're running a hackathon in the @… and @… PISCO projects in November...
https://fediscience.org/@PolarRES/115191376209325795

🇺🇦 #NowPlaying on #KEXP's #VarietyMix
Cate Francesca Brooks:
🎵 Polar Day
#CateFrancescaBrooks
https://catebrooksmusic.bandcamp.com/track/polar-day

Call for Panelists: “Saints and the Environment”
https://ift.tt/xNRGE9C
University of Alaska - Fairbanks - Alaska & Polar Regions Area Studies Bibliographer & Curator of…
via Input 4 RELCFP

Anybody know how to convert between these and cartesian or polar?

Intertwined polar, chiral, and ferro-rotational orders in a rotation-only insulator
Weizhe Zhang, June Ho Yeo, Xiaoyu Guo, Tony Chiang, Nishkarsh Agarwal, John T. Heron, Kai Sun, Junjie Yang, Sang-Wook Cheong, Youngjun Ahn, Liuyan Zhao
https://arxiv.org/abs/2509.08650

Intertwined polar, chiral, and ferro-rotational orders in a rotation-only insulator
Intertwined orders refer to strongly coupled and mutually dependent orders that coexist in correlated electron systems, often underpinning key physical properties of the host materials. Among them, polar, chiral, and ferro-rotational orders have been theoretically known to form a closed set of intertwined orders. However, experimental investigation into their mutual coupling and physical consequences has remained elusive. In this work, we employ the polar-chiral insulator Ni$_3$TeO$_6$ as a pla…

Replaced article(s) found for math.MG. https://arxiv.org/list/math.MG/new
[1/1]:
- On the polar of Schneider's difference body
Juli\'an Haddad, Dylan Langharst, Galyna V. Livshyts, Eli Putterman

Rotational Properties of Superradiant Condensates
Yin-da Guo, Kai-Dong Zhou, Shou-Shan Bao, Hong Zhang
https://arxiv.org/abs/2508.09567 https://arxiv.org/p…

Rotational Properties of Superradiant Condensates
Superradiance enables scalar fields to extract energy and angular momentum from a rotating black hole (BH), leading to the formation of a BH-condensate system. The condensate appears to exhibit global rotation as a rigid body, with phase propagation occurring only in the azimuthal direction, such a picture leads to unphysical superluminal velocities at large distances. In this work, we demonstrate that the apparent rotation is a collective effect arising from local radial, polar, and azimuthal …

Stability of discrete-symmetry flocks: sandwich state, traveling domains and motility-induced pinning
Swarnajit Chatterjee, Mintu Karmakar, Matthieu Mangeat, Heiko Rieger, Raja Paul
https://arxiv.org/abs/2507.08187

Stability of discrete-symmetry flocks: sandwich state, traveling domains and motility-induced pinning
Polar flocks in discrete active systems are often assumed to be robust, yet recent studies reveal their fragility under both imposed and spontaneous fluctuations. Here, we revisit the four-state active Potts model (APM) and show that its globally ordered phase is metastable across a broad swath of parameter space. Small counter-propagating droplets disrupt the flocking phase by inducing a persistent sandwich state, where the droplet-induced opposite-polarity lane remains embedded within the ori…

A Fast, Second-Order Accurate Poisson Solver in Spherical Polar Coordinates
Jeonghyeon Ahn, Woong-Tae Kim, Yonghwi Kim
https://arxiv.org/abs/2507.06784 htt…

A Fast, Second-Order Accurate Poisson Solver in Spherical Polar Coordinates
We present an efficient and accurate algorithm for solving the Poisson equation in spherical polar coordinates with a logarithmic radial grid and open boundary conditions. The method employs a divide-and-conquer strategy, decomposing the computational domain into hierarchical units with varying cell sizes. James's algorithm is used to compute the zero-boundary potentials of lower-level units, which are systematically integrated to reconstruct the zero-boundary potential over the entire domain. …

Former NFL TE Jimmy Graham breaks Arctic rowing record, makes history with polar ocean crossing

https://www.cbssports.com/nfl/news/former-

Polar solitons in a nonpolar chiral soft matter system
Jiahao Chen, Xingzhou Tang, Yang Ding, Susanta Chakraborty, Satoshi Aya, Bingxiang Li, Yanqing Lu
https://arxiv.org/abs/2506.16778

Polar solitons in a nonpolar chiral soft matter system
Polar solitons, i.e., solitonic waves accompanying asymmetry of geometry or phase, have garnered attention in polar systems, such as ferroelectric or magnetoelectric materials, where they play a critical role in topological transitions and nonreciprocal responses to external fields. A key question is whether such polar solitons can emerge in nonpolar systems, where intrinsic polarity is absent. Here, we demonstrate an unprecedented polar soliton with nematic order in a nonpolar and chiral liqui…

The elephants viewed by tourists from the swimming pool of the Elephant Bay Hotel are part of the largest captive herd in the world, brought to the river twice daily from the nearby Pinnawala Elephant Orphanage. For $16 tourists can visit the elephant orphanage, and pay an extra fee to “wash” and pose next to an elephant in the river.
From NPR's Goats & Soda:

Gamma-Ray Burst Polarimetry with the POLAR and POLAR-2 missions
Nicolas De Angelis, Philipp Azzarello, Franck Cadoux, Kurt Dittrich, Yannick Favre, Jochen Greiner, Johannes Hulsman, Coralie Husi, Merlin Kole, Hancheng Li, Slawomir Mianowski, Gabriel Pelleriti, Agnieszka Pollo, Nicolas Produit, Dominik Rybka, Jianchao Sun, Xin Wu, Shuang-Nan Zhang
https://

Gamma-Ray Burst Polarimetry with the POLAR and POLAR-2 missions
Gamma-Ray Bursts are among the most powerful and violent events in the Universe. Despite over half a century of observations of these transient sources, many open questions remain about their nature and the physical emission mechanisms at play. Polarization measurements of the GRB prompt gamma-ray emission have long been theorized to be able to answer most of these questions. Early polarization measurements did not allow to draw clear conclusions because of limited significance. With the aim …

Safe Gap-based Planning in Dynamic Settings
Max Asselmeier, Abdel Zaro, Dhruv Ahuja, Ye Zhao, Patricio A. Vela
https://arxiv.org/abs/2509.07239 https://arx…

Safe Gap-based Planning in Dynamic Settings
This chapter extends the family of perception-informed gap-based local planners to dynamic environments. Existing perception-informed local planners that operate in dynamic environments often rely on emergent or empirical robustness for collision avoidance as opposed to performing formal analysis of dynamic obstacles. This proposed planner, dynamic gap, explicitly addresses dynamic obstacles through several steps in the planning pipeline. First, polar regions of free space known as gaps are tra…

Call for Papers: ICMS 2026 Panel, "The Imagined Woman"
https://ift.tt/ncWBPp7
University of Alaska - Fairbanks - Alaska & Polar Regions Area Studies Bibliographer & Curator of…
via Input 4 RELCFP …

Rearrangements and infimum convolutions
Devraj Duggal, James Melbourne, Cyril Roberto
https://arxiv.org/abs/2508.07983 https://arxiv.org/pdf/2508.07983

Rearrangements and infimum convolutions
We develop a general comparison result for inf convolution operators related to rearrangement. As a consequence we derive comparison results under spherically symmetric rearrangement for Laplace and polar transforms. As a by product we simplify existing proofs related to the functional Blaschke Santalo inequality of Keith Ball and derive a comparison result for some parabolic PDE.

Two-photon-assisted collisions in ultracold gases of polar molecules
Charbel Karam, Gohar Hovhannesyan, Romain Vexiau, Maxence Lepers, Nadia Bouloufa-Maafa, Olivier Dulieu
https://arxiv.org/abs/2508.00607

Two-photon-assisted collisions in ultracold gases of polar molecules
We present a theoretical formalism to treat the ultracold dynamics of a pair of colliding polar molecules submitted to two laser fields. We express the dressed Hamiltonian including the dipole-dipole interaction of the colliding molecular pair, both in their ground and electronic excited states, as well as their interaction with the two laser fields. We apply adiabatic elimination of the electronic excited state to reduce the size of the dressed-state basis in which the dressed Hamiltoninan is …

Polar Express: Rapid Functionalization of Single-Walled Carbon Nanotubes in High Dipole Moment Media
Dominik Just, Ryszard Siedlecki, Maciej Krzywiecki, Oussama Er-Riyahi, Yann Pouillon, Javier Junquera, Karolina Z. Milowska, Dawid Janas
https://arxiv.org/abs/2508.09039

Polar Express: Rapid Functionalization of Single-Walled Carbon Nanotubes in High Dipole Moment Media
Fluorescent semiconducting single-walled carbon nanotubes (SWCNTs) hold considerable promise for photonics. Furthermore, the optical characteristics of the material can be significantly improved by covalent modification, which generates new spectral features in the near-infrared region and enhances its photoluminescence quantum yield. However, despite the dynamic development of this research domain, the importance of the solvent environment in which the SWCNT functionalization is conducted rema…

Atmospheric CO2 Ice in the Martian Polar Regions: Physical and Spectral Properties From Mars Climate Sounder Observations
R. W. Stevens, P. O. Hayne, A. Kleinb\"ohl, D. M. Kass
https://arxiv.org/abs/2509.02897

Atmospheric CO2 Ice in the Martian Polar Regions: Physical and Spectral Properties From Mars Climate Sounder Observations
$\text{CO}_{\text{2}}$ ice clouds are important for polar energy balance and the carbon dioxide cycle on Mars. However, uncertainties remain regarding their physical and radiative properties, which control how polar $\text{CO}_{\text{2}}$ clouds interact with the global Martian climate. Here, we use Mars Climate Sounder (MCS) observations of atmospheric radiance to estimate these physical and radiative properties. We find that Martian $\text{CO}_{\text{2}}$ clouds are typically composed of larg…

H-Net Job Guide Weekly Report for H-Buddhism: 3 August - 10 August
https://ift.tt/TbkuxPD
University of Alaska - Fairbanks - Alaska & Polar Regions Area Studies Bibliographer & Curator of…
via Input 4 RELCFP

CFP> Critical Review for Buddhist Studies (CRBS) vol. 38 (~ 2025. August. 31st)
https://ift.tt/xPGh4pj
University of Alaska - Fairbanks - Alaska & Polar Regions Area Studies Bibliographer & Curator of…
via Input 4 RELCFP

"Paris goal of 1.5°C warming is still too hot for polar ice sheets, study warns"
#ParisAgreement #Climate #ClimateChange

Paris goal of 1.5°C warming is still too hot for polar ice sheets, study warns
At the landmark Paris climate agreement, nearly every country in the world pledged to a goal to limit warming to well below 2° Celsius (3.6° Fahrenheit) above preindustrial levels by 2100, and work toward a more ambitious goal to limit warming to 1.5°C (2.7°F). The hope is that such a limit will help Earth avoid […]

Near-Field Spatial non-Stationary Channel Estimation: Visibility-Region-HMM-Aided Polar-Domain Simultaneous OMP
Thibaut Ceulemans, Cel Thys, Robbert Beerten, Zhuangzhuang Cui, Sofie Pollin
https://arxiv.org/abs/2508.04222

Near-Field Spatial non-Stationary Channel Estimation: Visibility-Region-HMM-Aided Polar-Domain Simultaneous OMP
This work focuses on channel estimation in extremely large aperture array (ELAA) systems, where near-field propagation and spatial non-stationarity introduce complexities that hinder the effectiveness of traditional estimation techniques. A physics-based hybrid channel model is developed, incorporating non-binary visibility region (VR) masks to simulate diffraction-induced power variations across the antenna array. To address the estimation challenges posed by these channel conditions, a novel …

Successive Cancellation Decoding For General Monotone Chain Polar Codes
Zichang Ren, Chunhang Zheng, Dou Li, Yuping Zhao
https://arxiv.org/abs/2509.03128 https://

Successive Cancellation Decoding For General Monotone Chain Polar Codes
Monotone chain polar codes generalize classical polar codes to multivariate settings, offering a flexible approach for achieving the entire admissible rate region in the distributed lossless coding problem. However, this flexibility also introduces significant challenges for existing successive cancellation (SC) based decoding schemes. Motivated by the need for a general SC decoding solution, we present a comprehensive decoding strategy for monotone chain polar codes that can handle arbitrary n…

An underdog story: Re-emergence of a polar instability at high pressure in KNbO3
Mohamad Baker Shoker, Sitaram Ramakrishnan, Boris Croes, Olivier Cregut, Nicolas Beyer, Kokou Dorkenoo, Pierre Rodi\`ere, Bj\"orn Wehinger, Gaston Garbarino, Mohamed Mezouar, Marine Verseils, Pierre Fertey, Salia Cherifi-Hertel, Pierre Bouvier, Mael Guennou
https://

An underdog story: Re-emergence of a polar instability at high pressure in KNbO3
Ferroelectricity in perovskites is known to be suppressed by a moderate hydrostatic pressure. The notion that a polar instability should reappear in a higher pressure regime is well accepted theoretically but experiments have failed so far to provide a conclusive evidence for it. Here, we investigate a classical but comparatively underlooked ferroelectric perovskite KNbO3. We use single crystal X-ray diffraction, infrared and Raman spectroscopy and second-harmonic generation to explore the phas…

Record cold grips Argentina, Chile and Uruguay #Argentina

Record cold grips Argentina, Chile and Uruguay
A polar air mass has brought record low temperatures to Argentina, Chile and Uruguay, causing at least 15 deaths and forcing governments to restrict gas supplies and activate emergency shelters.

CFP - Australian Association for Jewish Studies Annual Conference - 8-9 February 2026
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Estimating High-Order Time Derivatives of Kerr Orbital Functionals
Lennox S. Keeble, Alejandro C\'ardenas-Avenda\~no
https://arxiv.org/abs/2508.08888 https://

Estimating High-Order Time Derivatives of Kerr Orbital Functionals
Functions of bound Kerr geodesic motion play a central role in many calculations in relativistic astrophysics, ranging from gravitational-wave generation to self-force and radiation-reaction modeling. Although these functions can be expressed as a Fourier series using the geodesic fundamental frequencies, reconstructing them in coordinate time is challenging due to the coupling of the radial and polar motions. In this paper, we compare two strategies for performing such reconstructions and thei…

Topological polar textures on CsPbBr3 nanoplatelets
Monika Bhakar, Pooja Bhardwaj, Gokul M. Anilkumar, Atikur Rahman, Goutam Sheet
https://arxiv.org/abs/2509.01751 https://

Topological polar textures on CsPbBr3 nanoplatelets
Polar topological textures like the bubble domains, flux--closures, and labyrinth etc., unlock functional responses in ferroic systems but are difficult to stabilize and control in chemically simple, solution--grown materials. Here we show that ultra--thin, large--area CsPbBr$_3$ nanoplatelets host room--temperature ferroelectric bubble domains whose characteristic size is tunable by thickness. Using contact--resonance piezoresponse force microscopy (PFM) across 125ñm--2\~$μ$m, we observe a s…

Research Awards - 2025 Canadian Friends of Sufi Arts, Culture, and Knowledge (CFSACK)
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Long Polar vs. LDPC Codes under Complexity-Constrained Decoding
Felix Krieg, Marvin R\"ubenacke, Andreas Zunker, Stephan ten Brink
https://arxiv.org/abs/2508.05485 https://…

Long Polar vs. LDPC Codes under Complexity-Constrained Decoding
The prevailing opinion in industry and academia is that polar codes are competitive for short code lengths, but can no longer keep up with low-density parity-check (LDPC) codes as block length increases. This view is typically based on the assumption that LDPC codes can be decoded with a large number of belief propagation (BP) iterations. However, in practice, the number of iterations may be rather limited due to latency and complexity constraints. In this paper, we show that for a similar numb…

Three-year Program in Logic and Debate. The Art of Reasoning in the Nālandā Tradition
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Polar alignment of a circumbinary disc around a brown dwarf binary
Jeremy L. Smallwood, Thomas A. Baycroft, Amaury H. M. J. Triaud, Richard P. Nelson
https://arxiv.org/abs/2506.22747

Polar alignment of a circumbinary disc around a brown dwarf binary
Inspired by recent observations suggesting that the retrograde precession of the brown dwarf binary 2M1510 AB is consistent with induction by a polar circumbinary planet, we investigate the formation of such planets by studying the evolution of a primordial misaligned circumbinary disc around a brown dwarf binary. Analytical calculations show that a critical tilt angle of $i_{\rm crit} \gtrsim 50^\circ$ for moderately eccentric binaries is needed for polar alignment of circumbinary discs in sys…

Polar subcodes for MIMO systems
Liudmila Karakchieva, Peter Trifonov
https://arxiv.org/abs/2508.20684 https://arxiv.org/pdf/2508.20684

Polar subcodes for MIMO systems
Polar-coded multiple-input multiple-output systems are investigated. An advanced receiver implementing joint list decoding of polar codes and QR- and MMSE-based detectors is proposed. The approximate and exact path metrics are derived for joint list decoder of polar codes. A construction of polar subcodes for MIMO systems with cross-antenna dynamic freezing constraints is proposed. The obtained polar subcodes provide significant performance gain compared to LDPC-coded MIMO systems with the same…

Direct determination of antiferroelectric-to-ferroelectric phase transition pathways in PbZrO$_3$ with Operando Electron Microscopy
Menglin Zhu, Michael Xu, Louis Alaerts, Hao Pan, Colin Gilgenbach, Geoffroy Hautier, Lane W. Martin, James M. LeBeau
https://arxiv.org/abs/2509.07194

Direct determination of antiferroelectric-to-ferroelectric phase transition pathways in PbZrO$_3$ with Operando Electron Microscopy
Under a sufficiently high applied electric field, a non-polar antiferroelectric material, such as \ce{PbZrO3}, can undergo a rapid transformation to a polar ferroelectric phase. While this behavior is promising for energy storage and electromechanical applications, a complete understanding of the atomic-scale mechanisms governing the phase transition remain elusive. Here, we employ \textit{operando} scanning transmission electron microscopy electric field biasing to directly resolve the antifer…

Unexpected good news on the grant funding front...
Means I can stop worrying about how we're going to pay the best polar regional climate modelling team in the world™️ for the next 3 years and focus on doing some actually really good, cool science™️.
To be continued...
#AcademicChatter #climate

Towards Weight Distribution-Aware Polar Codes
Mohammad Rowshan, Vlad-Florin Dragoi
https://arxiv.org/abs/2506.15467 https://arxiv.org…

Towards Weight Distribution-Aware Polar Codes
Polar codes are constructed based on the reliability of sub-channels resulting from the polarization effect. However, this information-theoretic construction approach leads to a poor weight distribution. To address this issue, pre-transformed polar codes, such as CRC-polar codes and PAC codes, have been employed. In this paper, we focus on the structure of polar codes without applying any pre-transformations and explore methods, guided by the weight-contribution partial order, to design polar-l…

Japanese Journal of Religious Studies 51/2
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Variational first-principles approach to self-trapped polarons
Vasilii Vasilchenko, Matteo Giantomassi, Samuel Ponc\'e, Xavier Gonze
https://arxiv.org/abs/2507.05112

Variational first-principles approach to self-trapped polarons
The behavior of charge carriers in polar materials is governed by electron-phonon interactions, which affect their mobilities via phonon scattering and may localize carriers into self-induced deformation fields, forming self-trapped polarons. We present a first-principles study of self-trapped polaron formation in paradigmatic polar semiconductors and insulators using the variational polaron equations framework and self-consistent gradient optimization. Our method incorporates long-range correc…

Japanese Journal of Religious Studies 51/2
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Polar Coding and Linear Decoding
Geraldo A. Barbosa
https://arxiv.org/abs/2507.19695 https://arxiv.org/pdf/2507.19695…

Polar Coding and Linear Decoding
Polar encoding, described by Arikan in IEEE Transactions on Information Theory, Vol. 55, No. 7, July 2009, was a milestone for telecommunications. A Polar code distributes information among high and low-capacity channels, showing the possibility of achieving perfect channel capacity. The high-capacity channels allow almost noiseless transmission of data. When these channels are not high noise, reliability is achieved in the signal transmission. It starts to compete against codes such a Low-Dens…

Call for Panelists: “Saints and the Environment”
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CFP> UKABS 2026 conference on Buddhism and Emotion
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Call for Papers: ICMS 2026 Panel, "The Imagined Woman"
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Code Rate Optimization via Neural Polar Decoders
Ziv Aharoni, Bashar Huleihel, Henry D Pfister, Haim H Permuter
https://arxiv.org/abs/2506.15836 https://…

Code Rate Optimization via Neural Polar Decoders
This paper proposes a method to optimize communication code rates via the application of neural polar decoders (NPDs). Employing this approach enables simultaneous optimization of code rates over input distributions while providing a practical coding scheme within the framework of polar codes. The proposed approach is designed for scenarios where the channel model is unknown, treating the channel as a black box that produces output samples from input samples. We employ polar codes to achieve ou…

ANN: Japanese Journal of Religious Studies, Volume 51 Issue 2
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H-Net Job Guide Weekly Report for H-Buddhism: 3 August - 10 August
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CFP> Critical Review for Buddhist Studies (CRBS) vol. 38 (~ 2025. August. 31st)
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Research Awards - 2025 Canadian Friends of Sufi Arts, Culture, and Knowledge (CFSACK)
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CFP: Materiality and Buddhist Art, College Art Association 2026 Annual Meeting (Feb. 18-21)
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Enhanced Successive Cancellation List Decoder for Long Polar Codes Targeting 6G Air Interface
Jiajie Li, Sihui Shen, Warren J. Gross
https://arxiv.org/abs/2508.16498 https://

Enhanced Successive Cancellation List Decoder for Long Polar Codes Targeting 6G Air Interface
The 6th generation communication standard's air interface requires innovation in channel coding to fulfill anticipated energy and area cost reduction requirements. In this paper, we propose algorithmic techniques to enable the implementation of long polar codes (e.g., length 8K bits) in next-generation communications standards by addressing key challenges in memory usage and computational complexity presented by successive decoding list (SCL) polar decoding. Perturbation-enhanced (PE) successiv…

Precoded Polar Product Decoder Based on Soft-Output SCL Decoding and Maximization of Generalized Mutual Information
Nicol\'as Alvarez Prado, Andreas Stra{\ss}hofer
https://arxiv.org/abs/2508.20580 …

Precoded Polar Product Decoder Based on Soft-Output SCL Decoding and Maximization of Generalized Mutual Information
We combine two approaches to optimize the iterative decoding of product codes with precoded polar component codes. On one side, we generate bitwise soft messages based on the codebook probability, an approximation of an auxiliary quantity that considers all valid decoding paths of a successive cancellation list (SCL) decoder. On the other side, we scale the soft information during message passing with offline-computed coefficients, which maximize the generalized mutual information (GMI) between…

Neural Polar Decoders for Deletion Channels
Ziv Aharoni, Henry D. Pfister
https://arxiv.org/abs/2507.12329 https://arxiv.org/pdf/2507…

Neural Polar Decoders for Deletion Channels
This paper introduces a neural polar decoder (NPD) for deletion channels with a constant deletion rate. Existing polar decoders for deletion channels exhibit high computational complexity of $O(N^4)$, where $N$ is the block length. This limits the application of polar codes for deletion channels to short-to-moderate block lengths. In this work, we demonstrate that employing NPDs for deletion channels can reduce the computational complexity. First, we extend the architecture of the NPD to suppor…

Performance Analysis of Spatiotemporal 2-D Polar Codes for Massive MIMO with MMSE Receivers
Yaqi Li, Xiaohu You, Jiamin Li, Chen Ji, Bin Sheng
https://arxiv.org/abs/2507.19986 h…

Performance Analysis of Spatiotemporal 2-D Polar Codes for Massive MIMO with MMSE Receivers
With the evolution from 5G to 6G, ultra-reliable low-latency communication (URLLC) faces increasingly stringent performance requirements. Lower latency constraints demand shorter channel coding lengths, which can severely degrade decoding performance. The massive multiple-input multiple-output (MIMO) system is considered a crucial technology to address this challenge due to its abundant spatial degrees of freedom (DoF). While polar codes are theoretically capacity-achieving in the limit of infi…

Japanese Journal of Religious Studies 51/2
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Japanese Journal of Religious Studies 51/2
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CFP> UKABS 2026 conference on Buddhism and Emotion
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Call for Papers: ICMS 2026 Panel, "The Imagined Woman"
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ANN: Japanese Journal of Religious Studies, Volume 51 Issue 2
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CFP: 2026 Gods and Monsters Conference at Texas State University
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H-Net Job Guide Weekly Report for H-Buddhism: 3 August - 10 August
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CFP> Critical Review for Buddhist Studies (CRBS) vol. 38 (~ 2025. August. 31st)
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Research Awards - 2025 Canadian Friends of Sufi Arts, Culture, and Knowledge (CFSACK)
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CFP: Materiality and Buddhist Art, College Art Association 2026 Annual Meeting (Feb. 18-21)
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