Tootfinder

If you are sad, let’s ride a bicycle
Let’s put the wind under the feet
Oh, let’s ride a bicycle
With arms opened freely
Na, na-na-na, na-na-na
Na-na-na-na-na
Na-na-na, na-na-na, na-na-na
Na-na-na-na-na
https://www.youtube.com/watch?v=6uq3P7zeYy

Automatic Generation of Python Programs Using Context-Free Grammars
Kamel Yamani, Marwa Na\"ir, Riyadh Baghdadi
https://arxiv.org/abs/2403.06503 https…

Automatic Generation of Python Programs Using Context-Free Grammars
In recent years, data has emerged as the new gold, serving as a powerful tool for creating intelligent systems. However, procuring high-quality data remains challenging, especially for code. To address this, we developed TinyPy Generator, a tool that generates random Python programs using a context-free grammar. The generated programs are guaranteed to be correct by construction. Our system uses custom production rules (in the Backus-Naur Form (BNF) format) to recursively generate code. This al…

Impacto Distributivo Potencial de Reformas na Tributacao Indireta no Brasil: Simulacoes Baseadas na PEC 45/2019
Rozane Bezerra dde Siqueira, Jose Ricardo Bezerra Nogueira, Carlos Feitosa Luna
https://arxiv.org/abs/2404.07651

Impacto Distributivo Potencial de Reformas na Tributacao Indireta no Brasil: Simulacoes Baseadas na PEC 45/2019
This paper analyzes the redistributive impacts of indirect taxation reforms in Brazil inspired by PEC 45/2019, particularly in the version that led to EC 132/2023. Comparisons are made between the current system and the simulated reforms, considering the distribution of the tax burden among families in different income classes, as well as the impact on poverty and inequality indicators. The simulations are conducted based on the combination of effective tax rates that apply to goods and service…

Evaluation and improvement of ETSI ITS Contention-Based Forwarding (CBF) of warning messages in highway scenarios
Oscar Amador, Manuel Urue\~na, Maria Calderon, Ignacio Soto
https://arxiv.org/abs/2403.05994

Evaluation and improvement of ETSI ITS Contention-Based Forwarding (CBF) of warning messages in highway scenarios
This paper evaluates the performance of the ETSI Contention-Based Forwarding (CBF) GeoNetworking protocol for distributing warning messages in highway scenarios, including its interaction with the Decentralized Congestion Control (DCC) mechanism. Several shortcomings of the standard ETSI CBF algorithm are identified, and we propose different solutions to these problems, which are able to reduce the number of transmissions by an order of magnitude, while reducing the message end-to-end delay and…

A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys
M. Maus, Y. Lai, H. E. Noriega, S. Ramirez-Solano, A. Aviles, S. Chen, S. Fromenteau, H. Gil-Mar\'in, C. Howlett, M. Vargas-Maga\~na, M. White, P. Zarrouk, J. Aguilar, S. Ahlen, O. Alves, S. Brieden, D. Brooks, E. Burtin, T. Claybaugh, S. Cole, K. Dawson, M. Icaza-Lizaola, A. de la Macorra, A. de Mattia, P. Doel, S. Ferraro, N. Findlay, J. E. Forero-Romero, E. Gazta…

A comparison of effective field theory models of redshift space galaxy power spectra for DESI 2024 and future surveys
In preparation for the next generation of galaxy redshift surveys, and in particular the year-one data release from the Dark Energy Spectroscopic Instrument (DESI), we investigate the consistency of a variety of effective field theory models that describe the galaxy-galaxy power spectra in redshift space into the quasi-linear regime using 1-loop perturbation theory. These models are employed in the pipelines \texttt{velocileptors}, \texttt{PyBird}, and \texttt{Folps$ν$}. While these models hav…

Jest taki stary dowcip, że poznaniacy są tak oszczędni, że mają nawet własną Maltę.
Ja ostatnio dowiedziałem się, że mamy też własną Saharę.
https://www.openstreetmap.org/way/326214482
Z doświadczenia, na "Saharze" nie jest tak gorąco, jak na tej asfal…

Discovered an incredible painting today: The Babylonian Marriage Market, by Edwin Long.
Edwin Long is thought to have conceived the painting in direct response to creation of the new laws centered around women's ownership and the ongoing women's suffrage movement.
Every face tells such a different story, and so much of civilization is contained within this painting. What an amazing work.
Added to my gallery of favorite paintings:

Aggregation in Dilute Aqueous Solutions of Hydroxypropyl Cellulose with Salt Ions
Valery I. Kovalchuk
https://arxiv.org/abs/2404.07708 https://

Aggregation in Dilute Aqueous Solutions of Hydroxypropyl Cellulose with Salt Ions
Thermal behaviors of hydroxypropyl cellulose dilute aqueous solutions with impurities of Group I alkali metal ions (Li, Na, K, Rb and Cs chlorides) has been studied by means of static and dynamic light scattering measurements. From the experimental data, it follows that at temperatures above the LCST and in the presence of salts, there arise supramolecular associates (clusters) that are several times larger than the wavelength of visible light. It is shown that the observed intensity of backsca…

Improved electrochemical performance of NASICON type Na$_{3}$V$_{2-x}$Co$_x$(PO$_{4}$)$_{3}$/C ($x=$ 0--0.15) cathode for high rate and stable sodium-ion batteries
Simranjot K. Sapra, Jeng-Kuei Chang, Rajendra S. Dhaka
https://arxiv.org/abs/2405.05559

Improved electrochemical performance of NASICON type Na$_{3}$V$_{2-x}$Co$_x$(PO$_{4}$)$_{3}$/C ($x=$ 0--0.15) cathode for high rate and stable sodium-ion batteries
In recent years, the Na-ion SuperIonic CONductor (NASICON) based polyanionics are considered the pertinent cathode materials in sodium-ion batteries due to their 3D open framework, which can accommodate a wide range of Na content and can offer high ionic conductivity with great structural stability. However, owing to the inferior electronic conductivity, these materials suffer from unappealing rate capability and cyclic stability for practical applications. Therefore, in this work we investigat…

Fluoride Frameworks as Potential Calcium Battery Cathodes
Dereje Bekele Tekliye, Gopalakrishnan Sai Gautam
https://arxiv.org/abs/2404.05820 https://…

Fluoride Frameworks as Potential Calcium Battery Cathodes
Calcium batteries (CBs) are potential next-generation energy storage devices, offering a promising alternative to lithium-ion batteries due to their theoretically high energy density, better safety, and lower costs associated with the natural abundance of calcium. However, the limited availability of positive electrode (cathode) materials has constrained the development of CBs so far. Given the similar ionic radii of Na$^+$ and Ca$^{2+}$, structures that are effective at reversibly intercalatin…

Why are the 4.7.x ESMTP enhanced status codes that Google is using completely different from the IANA-registered codes?
https://support.google.com/a/answer/14229414?hl=en&fl=1&sjid=14366457679045330359-NA

Respawn and EA postpone the North American Finals of Apex Legends, after an unknown user hacked the game and gave pros hacks like aimbots during the event (Paul Tassi/Forbes)
https://www.forbes.com/sites/paultassi/202

Massive ‘Apex Legends’ Hack Disrupts NA Finals, Raises Serious Security Concerns
Something rather terrifying has disrupted the North American Finals of Apex Legends, and players are now starting to potentially worry about their own accounts

Just published 🚀: Easily navigate code delegates
#c#

Are High $\Sigma_1$ Massive Blue Spiral Galaxies Rejuvenated Systems?
Cai-Na Hao, Xiaoyang Xia, Yong Shi, Rui Guo, Yanmei Chen, Shuai Feng, Junqiang Ge, Qiusheng Gu
https://arxiv.org/abs/2404.03850

Are High $Σ_1$ Massive Blue Spiral Galaxies Rejuvenated Systems?
Quiescent galaxies generally possess denser cores than star-forming galaxies with similar mass. As a measurement of the core density, the central stellar mass surface density within a radius of 1 kpc ($Σ_1$) was thus suggested to be closely related to galaxy quenching. Massive star-forming galaxies with high $Σ_1$ do not fit into this picture. To understand the origin of such galaxies, we compare the spatially-resolved stellar population and star formation properties of massive ($ > 10^{10.5}…

New catalog of distances to planetary nebulae based on Gaia parallaxes and statistical distances
Diego Hern\'andez-Ju\'arez, M\'onica Rodr\'iguez, Miriam Pe\~na
https://arxiv.org/abs/2403.04606

New catalog of distances to planetary nebulae based on Gaia parallaxes and statistical distances
We have developed a method to determine the most reliable distances for a large group of planetary nebulae. For this purpose, we analyze the distances obtained from \textit{Gaia} parallaxes and three determinations of statistical distances. The most reliable distance is derived for 2211 objects, and uncertainties for these distances are calculated in a homogeneous way. Using our most reliable distances, we compare the distributions of Galactic heights of hydrogen-poor and hydrogen-rich central …

Klimaatcrisis: rapport over Afrika voorspelt daar een 30% kleinere oogst, 50.000.000 mensen zonder water.
Ik gok: veel doden en veel vluchtelingen. Wij, in het rijke noordwesten schuiven de schuld van ons af, sluiten de poort, trekken de ophaalbrug op en laten het, op een enkele giro 555 aktie na gewoon gebeuren.

Climate change: alarming Africa-wide report predicts 30% drop in crop revenue, 50 million without water
A new study reveals that from 2050, Africa will suffer from food and water scarcity, and a massive loss of jobs in agriculture, unless climate change mitigation measures are put in place now.

Optimal pinwheel partitions and pinwheel solutions to a nonlinear Schr\"odinger system
M\'onica Clapp, Alberto Salda\~na, Mayra Soares, V\'ictor A. Vicente-Ben\'itez
https://arxiv.org/abs/2404.04448

Optimal pinwheel partitions and pinwheel solutions to a nonlinear Schrödinger system
We establish the existence of a solution to a nonlinear competitive Schrödinger system whose scalar potential tends to a positive constant at infinity with an appropriate rate. This solution has the property that all components are invariant under the action of a group of linear isometries and each component is obtained from the previous one by composing it with some fixed linear isometry. We call it a pinwheel solution. We describe the asymptotic behavior of the least energy pinwheel solution…

Isto é bom.
O MNE polaco dš uma lição (ou um arraso) aos russos na ONU.
https://www.motherjones.com/politics/2024/02/poland-putin-propaganda-un-speech-radoslaw-sikorski/

Watch Poland debunk Putin's propaganda with this powerful UN speech
These four minutes from Foreign Minister Radoslaw Sikorski are worth your time.

Why are the 4.7.x ESMTP enhanced status codes that Google is using completely different from the IANA-registered codes?
https://support.google.com/a/answer/14229414?hl=en&fl=1&sjid=14366457679045330359-NA

Predicting room-temperature conductivity of Na-ion super ionic conductors with the minimal number of easily-accessible descriptors
Seong-Hoon Jang, Randy Jalem, Yoshitaka Tateyama
https://arxiv.org/abs/2404.01627

Predicting room-temperature conductivity of Na-ion super ionic conductors with the minimal number of easily-accessible descriptors
Given the vast compositional possibilities Na$_nM_mM_{m'}$Si$_{3-p-a}$P$_p$As$_a$O$_{12}$, Na-ion superionic conductors (NASICON) are attractive but complicate for designing materials with enhanced room-temperature Na-ion conductivity $σ_{\rm Na,300K}$. We propose an explicit regression model for $σ_{\rm Na,300K}$ with easily-accessible descriptors, by exploiting density functional theory molecular dynamics (DFT-MD). Initially, we demonstrate that two primary descriptors, the bottleneck width…

Searching for binary black hole sub-populations in gravitational wave data using binned Gaussian processes
Anarya Ray, Ignacio Maga\~na Hernandez, Katelyn Breivik, Jolien Creighton
https://arxiv.org/abs/2404.03166

Searching for binary black hole sub-populations in gravitational wave data using binned Gaussian processes
Astrophysically motivated population models for binary black hole observables are often insufficient to capture the imprints of multiple formation channels. This is mainly due to the strongly parametrized nature of such investigations. Using a non-parametric model for the joint population-level distributions of binary black hole component masses and effective inspiral spins, we find hints of multiple subpopulations in the third gravitational wave transient catalog. The higher (more positive) sp…

Globally Convergent Distributed Sequential Quadratic Programming with Overlapping Decomposition and Exact Augmented Lagrangian Merit Function
Runxin Ni, Sen Na, Sungho Shin, Mihai Anitescu
https://arxiv.org/abs/2402.17170

Globally Convergent Distributed Sequential Quadratic Programming with Overlapping Decomposition and Exact Augmented Lagrangian Merit Function
In this paper, we address the problem of solving large-scale graph-structured nonlinear programs (gsNLPs) in a scalable manner. GsNLPs are problems in which the objective and constraint functions are associated with a graph node, and they depend only on the variables of adjacent nodes. This graph-structured formulation encompasses various specific instances, such as dynamic optimization, PDE-constrained optimization, multi-stage stochastic optimization, and optimization over networks. We propos…

Aligning Large Language Models for Enhancing Psychiatric Interviews through Symptom Delineation and Summarization
Jae-hee So, Joonhwan Chang, Eunji Kim, Junho Na, JiYeon Choi, Jy-yong Sohn, Byung-Hoon Kim, Sang Hui Chu
https://arxiv.org/abs/2403.17428

Aligning Large Language Models for Enhancing Psychiatric Interviews through Symptom Delineation and Summarization
Recent advancements in Large Language Models (LLMs) have accelerated their usage in various domains. Given the fact that psychiatric interviews are goal-oriented and structured dialogues between the professional interviewer and the interviewee, it is one of the most underexplored areas where LLMs can contribute substantial value. Here, we explore the use of LLMs for enhancing psychiatric interviews, by analyzing counseling data from North Korean defectors with traumatic events and mental health…

Almost strictly sign regular rectangular matrices
P. Alonso, J. M. Pe\~na, M. L. Serrano
https://arxiv.org/abs/2402.10225 https://arx…

Almost strictly sign regular rectangular matrices
Almost strictly sign regular matrices are sign regular matrices with a special zero pattern and whose nontrivial minors are nonzero. In this paper we provide several properties of almost strictly sign regular rectangular matrices and analyze their QR factorization.

Nuclear Matter Equation of State in the Brueckner-Hartree-Fock Approach and Standard Skyrme Energy-Density Functionals
Isaac Vida\~na, J\'er\^ome Margueron, Hans-Josef Schulze
https://arxiv.org/abs/2404.03583

Nuclear Matter Equation of State in the Brueckner-Hartree-Fock Approach and Standard Skyrme Energy-Density Functionals
The equation of state of asymmetric nuclear matter as well as the neutron and proton effective masses and their partial-wave and spin-isospin decomposition are analyzed within the Brueckner--Hartree--Fock approach. Theoretical uncertainties for all these quantities are estimated by using several phase-shift-equivalent nucleon-nucleon forces together with two types of three-nucleon forces, phenomenological and microscopic. It is shown that the choice of the three-nucleon force plays an important…

Residual-Based a Posteriori Error Estimators for Algebraic Stabilizations
Abhinav Jha
https://arxiv.org/abs/2404.02804 https://arxiv.…

Residual-Based a Posteriori Error Estimators for Algebraic Stabilizations
In this note, we extend the analysis for the residual-based a posteriori error estimators in the energy norm defined for the algebraic flux correction (AFC) schemes [Jha20.CAMWA] to the newly proposed algebraic stabilization schemes [JK21.NM, Kn23.NA]. Numerical simulations on adaptively refined grids are performed in two dimensions showing the higher efficiency of an algebraic stabilization with similar accuracy compared with an AFC scheme.

Optimization of the Downlink Spectral- and Energy-Efficiency of RIS-aided Multi-user URLLC MIMO Systems
Mohammad Soleymani, Ignacio Santamaria, Eduard Jorswieck, Robert Schober, Lajos Hanzo
https://arxiv.org/abs/2402.16434

Optimization of the Downlink Spectral- and Energy-Efficiency of RIS-aided Multi-user URLLC MIMO Systems
Modern wireless communication systems are expected to provide improved latency and reliability. To meet these expectations, a short packet length is needed, which makes the first-order Shannon rate an inaccurate performance metric for such communication systems. A more accurate approximation of the achievable rates of finite-block-length (FBL) coding regimes is known as the normal approximation (NA). It is therefore of substantial interest to study the optimization of the FBL rate in multi-user…

On the group cohomology of groups of the form $\mathbb{Z}^n\rtimes \mathbb{Z}/m$ with $m$ free of squares
Luis Jorge S\'anchez Salda\~na, Mario Vel\'asquez
https://arxiv.org/abs/2403.14569

On the group cohomology of groups of the form $\mathbb{Z}^n\rtimes \mathbb{Z}/m$ with $m$ free of squares
We provide an explicit computation of the cohomology groups (with untwisted coefficients) of semidirect products of the form $\mathbb{Z}^n\rtimes \mathbb{Z}/m$ with $m$ free of squares, by means of formulas that only depend on $n$, $m$ and the action of $\mathbb{Z}/m$ on $\mathbb{Z}^n$. We want to highlight the fact that we are not impossing any conditions on the $\mathbb{Z}/m$-action on $\mathbb{Z}^n$, and as far as we know our formulas are the first in the literature in this generality. This …

Detailed study of the decay of $^{21}$Mg
E. A. M. Jensen, S. T. Nielsen, A. Andreyev, M. J. G. Borge, J. Cederk\"all, L. M. Fraile, H. O. U. Fynbo, L. J. Harkness-Brennan, B. Jonson, D. S. Judson, O. S. Kirsebom, R. Lic\u{a}, M. V. Lund, M. Madurga, N. Marginean, C. Mihai, R. D. Page, \'A. Perea, K. Riisager, O. Tengblad
https://

Detailed study of the decay of $^{21}$Mg
Beta-delayed proton and gamma emission in the decay of $^{21}$Mg has been measured at ISOLDE, CERN with the ISOLDE Decay Station (IDS) set-up. The existing decay scheme is updated, in particular what concerns proton transitions to excited states in $^{20}$Ne. Signatures of interference in several parts of the spectrum are used to settle spin and parity assignments to highly excited states in $^{21}$Na. The previously reported $β$p$α$ branch is confirmed. A half-life of 120.5(4) ms is extracte…

Action potential propagation properties of a reduced Hodgkin-Huxley type model with ATP Na-K pumps
L\'izia Branco, Rui Dil\~ao
https://arxiv.org/abs/2402.16711

Action potential propagation properties of a reduced Hodgkin-Huxley type model with ATP Na-K pumps
We explore the relationship between the sodium and potassium gating variables in the Hodgkin-Huxley electrophysiology model showing that the transport of sodium and potassium are intrinsically related and may be associated with the ubiquitous ATPase mechanism responsible for energy transport to cells. This reduces the dimension of the original 4-dimensional HH model, decreasing the complexity of the model equations. With a new reduced 2-dimensional HH-type model equations, we have derived the m…

On the association of GW190425 with its potential electromagnetic counterpart FRB 20190425A
Ignacio Maga\~na Hernandez, Virginia D'Emilio, Soichiro Morisaki, Mohit Bhardwaj, Antonella Palmese
https://arxiv.org/abs/2404.02496

On the association of GW190425 with its potential electromagnetic counterpart FRB 20190425A
Recent work by Moroianu et al. (2022) has suggested that the binary neutron star (BNS) merger GW190425 might have a potential fast radio burst (FRB) counterpart association, FRB 20190425A, at the 2.8$σ$ level of confidence with a likely host galaxy association, namely UGC10667. The authors argue that the observations are consistent with a long-lived hypermassive neutron star (HMNS) that formed promptly after the BNS merger and was stable for approximately 2.5 hours before promptly collapsing i…

MSene: A new large family of two-dimensional transition metal sulfide with MXene structure
Shu-Xiang Qiao, Yu-Lin Han, Na Jiao, Meng-Meng Zheng, Hong-Yan Lu, Ping Zhang
https://arxiv.org/abs/2405.03928

MSene: A new large family of two-dimensional transition metal sulfide with MXene structure
Nowadays, discovering new two-dimensional (2D) materials with unique properties and potential applications remains a focus in condensed matter physics. Here, based on first-principles calculations, we report a new large family of transition metal sulfides M2S with MXene structure in 2H and 1T phases, which we name as MSene. Twenty-four out of fifty-eight MSenes are proved to be stable. Notably, this family includes twelve superconducting (SC) materials, seven SC topological metals (SCTMs), four…

At the same age, metallicity, and alpha-enhancement, sodium is a more effective tracer of the young and old sequences of the Milky Way disc
Evans K. Owusu, Sven Buder, Ashley J. Ruiter, Ivo R. Seitenzahl, Nicol\'as Rodr\'iguez-Segovia
https://arxiv.org/abs/2405.00315

At the same age, metallicity, and alpha-enhancement, sodium is a more effective tracer of the young and old sequences of the Milky Way disc
Trends in the enrichment of elements with stellar ages are a powerful avenue to identify unexplained origins of the elements. We investigate the stellar abundance trends of low to intermediate-mass stars using the GALAH DR3 high-resolution spectroscopic dataset of 6234 solar-type stars. Our study explores the elemental abundance [X/Fe] of sodium (Na) with age. We find a pronounced enrichment in [Na/Fe] at super solar metallicity (i.e., [Fe/H] above 0) in the old sequence of Milky Way disc stars…

Emittance preservation in a plasma-wakefield accelerator
C. A. Lindstr{\o}m, J. Beinortait\.e, J. Bj\"orklund Svensson, L. Boulton, J. Chappell, S. Diederichs, B. Foster, J. M. Garland, P. Gonz\'alez Caminal, G. Loisch, F. Pe\~na, S. Schr\"oder, M. Th\'evenet, S. Wesch, M. Wing, J. C. Wood, R. D'Arcy, J. Osterhoff
https://

Emittance preservation in a plasma-wakefield accelerator
Radio-frequency particle accelerators are engines of discovery, powering high-energy physics and photon science, but are also large and expensive due to their limited accelerating fields. Plasma-wakefield accelerators (PWFAs) provide orders-of-magnitude stronger fields in the charge-density wave behind a particle bunch travelling in a plasma, promising particle accelerators of greatly reduced size and cost. However, PWFAs can easily degrade the beam quality of the bunches they accelerate. Emitt…

Kitaev-Heisenberg cobaltates: Coulomb exchange as leading nearest-neighbor interaction mechanism
Pritam Bhattacharyya, Thorben Petersen, Satoshi Nishimoto, Liviu Hozoi
https://arxiv.org/abs/2404.12742

Kitaev-Heisenberg cobaltates: Coulomb exchange as leading nearest-neighbor interaction mechanism
A range of honeycomb Co oxide compounds has been proposed and investigated in the search for a topological Kitaev spin liquid. Analyzing the quantum chemistry of interacting magnetic moments in Na$_3$Co$_2$SbO$_6$, a representative $LS$-coupled $t_{2g}^5e_g^2$ magnet, we find that the Kitaev and off-diagonal $Γ$ interactions are sizable and antiferromagnetic but still weaker than the Heisenberg contribution. Except $Γ$', all nearest-neighbor couplings are mainly determined by Coulomb exchange…

TESS photometry and CAOS spectroscopy of six eclipsing binaries with Am components
G. Catanzaro, A. Frasca, J. Alonso-Santiago, C. Colombo
https://arxiv.org/abs/2402.16648

TESS photometry and CAOS spectroscopy of six eclipsing binaries with Am components
In this paper, we present the results of a comprehensive study of six eclipsing binaries whose components are confirmed or suspected Am stars. By combining long-term high-resolution CAOS spectroscopy and TESS photometry we have been able to accurately obtain the orbital parameters of each system as well as the atmospheric parameters of its components. We performed an in-depth chemical analysis and provided chemical abundances of C, O, Na, Mg, Si, Ca, Sc, Ti, Cr, Mn, Fe, Ni, Zn, Sr, Y, Zr, and B…

Navigating Eukaryotic Genome Annotation Pipelines: A Route Map to BRAKER, Galba, and TSEBRA
Tom\'a\v{s} Br\r{u}na, Lars Gabriel, Katharina J. Hoff
https://arxiv.org/abs/2403.19416

Navigating Eukaryotic Genome Annotation Pipelines: A Route Map to BRAKER, Galba, and TSEBRA
Annotating the structure of protein-coding genes represents a major challenge in the analysis of eukaryotic genomes. This task sets the groundwork for subsequent genomic studies aimed at understanding the functions of individual genes. BRAKER and Galba are two fully automated and containerized pipelines designed to perform accurate genome annotation. BRAKER integrates the GeneMark-ETP and AUGUSTUS gene finders, employing the TSEBRA combiner to attain high sensitivity and precision. BRAKER is ad…

Determining the chemical composition of diamagnetic mixed solids via measurements of the magnetic susceptibility
Miao Miao Zhao, Yang Yang, Na Du, Yu Ying Zhu, Peng Ren, Fei Yen
https://arxiv.org/abs/2404.02012

Determining the chemical composition of diamagnetic mixed solids via measurements of the magnetic susceptibility
Mixed solid compounds are employed in a vast array of applications so an accurate determination of their chemical compositions is of crucial importance. All current characterization methods require specially-treated samples so the availability of a more practical method with similar accuracy should alleviate the quantification process. In this work, we show how the doping concentration $δ$ (or isotope concentration) of a mixed solid compound in powdered form, where both parent compounds are di…

View-Consistent 3D Editing with Gaussian Splatting
Yuxuan Wang, Xuanyu Yi, Zike Wu, Na Zhao, Long Chen, Hanwang Zhang
https://arxiv.org/abs/2403.11868 http…

View-Consistent 3D Editing with Gaussian Splatting
The advent of 3D Gaussian Splatting (3DGS) has revolutionized 3D editing, offering efficient, high-fidelity rendering and enabling precise local manipulations. Currently, diffusion-based 2D editing models are harnessed to modify multi-view rendered images, which then guide the editing of 3DGS models. However, this approach faces a critical issue of multi-view inconsistency, where the guidance images exhibit significant discrepancies across views, leading to mode collapse and visual artifacts of…

Magnonic Thermal Machines
N. Vidal-Silva, Francisco J. Pe\~na, Roberto E. Troncoso, Patricio Vargas
https://arxiv.org/abs/2404.08153 https://

Magnonic Thermal Machines
We propose a magnon-based thermal machine in two-dimensional (2D) magnetic insulators. The thermodynamical cycles are engineered by exposing a magnon spin system to thermal baths at different temperatures and tuning the Dzyaloshinskii-Moriya (DM) interaction. We find for the Otto cycle that a thermal gas of magnons converts a fraction of heat into energy in the form of work, where the efficiency is maximized for specific values of DM, reaching the corresponding Carnot efficiency. We witness a p…

Implication of odd-even staggering in the charge radii of calcium isotopes
Rong An, Xiang Jiang, Na Tang, Li-Gang Cao, Feng-Shou Zhang
https://arxiv.org/abs/2404.18545

Implication of odd-even staggering in the charge radii of calcium isotopes
Inspired by the evidently observed odd-even staggering and the inverted parabolic-like shape of charge radii along calcium isotopic chain, the ground state properties of calcium isotopes are investigated by constraining the root-mean-square (rms) charge radii under the covariant energy density functionals with effective forces NL3 and PK1. In this work, the pairing correlations are tackled by solving the state-dependent Bardeen-Cooper-Schrieffer equations. The calculated results suggest that th…

Convolution Identities of Stirling Numbers
Nadia Na Li, Wenchang Chu
https://arxiv.org/abs/2404.09891 https://arxiv.org/pdf/2404.0989…

Convolution Identities of Stirling Numbers
By means of the generating function method, a linear recurrence relation is explicitly resolved. The solution is expressed in terms of the Stirling numbers of both the first and the second kind. Two remarkable pairs of combinatorial identities are established as applications, that contain some well-known convolution formulae on Stirling numbers as special cases.

Modified mean field ansatz for charged polarons in a Bose-Einstein condensate
Ubaldo Cavazos Olivas, Luis A. Pe\~na Ardila, Krzysztof Jachymski
https://arxiv.org/abs/2404.11387

Modified mean field ansatz for charged polarons in a Bose-Einstein condensate
Ionic Bose polarons are quantum entities emerging from the interaction between an ion and a Bose-Einstein condensate (BEC), featuring long-ranged interactions that can compete with the gas healing length. This can result in strong interparticle correlations and enhancement of gas density around the ion. One possible approach to describe this complex system with high accuracy relies on numerical treatment such as the quantum Monte Carlo (QMC) techniques. Nevertheless, it is computationally very …

The hunt of PeVatrons as the origin of the most energetic photons observed in our Galaxy
Emma de O\~na Wilhelmi, Rub\'en L\'opez-Coto, Felix Aharonian, Elena Amato, Zhen Cao, Stefano Gabici, Jim Hinton
https://arxiv.org/abs/2404.16591

The hunt of PeVatrons as the origin of the most energetic photons observed in our Galaxy
Ultrarelativistic particles called cosmic rays permeate the Milky Way, propagating through the Galactic turbulent magnetic fields. The mechanisms under which these particles increase their energy can be reasonably described by current theories of acceleration and propagation of cosmic rays. There are, however, still many open questions as to how to reach petaelectronvolt (PeV) energies, the maximum energy believed to be attained in our Galaxy, and in which astrophysical sources (dubbed {\it PeV…

This https://arxiv.org/abs/2402.16711 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Action potential propagation properties of a reduced Hodgkin-Huxley type model with ATP Na-K pumps
We explore the relationship between the sodium and potassium gating variables in the Hodgkin-Huxley electrophysiology model showing that the transport of sodium and potassium are intrinsically related and may be associated with the ubiquitous ATPase mechanism responsible for energy transport to cells. This reduces the dimension of the original 4-dimensional HH model, decreasing the complexity of the model equations. With a new reduced 2-dimensional HH-type model equations, we have derived the m…

Granular aqueous suspensions with controlled inter-particular friction and adhesion
Lily Blaiset, Bruno Bresson, Ludovic Olanier, \'Elisabeth Guazzelli, Matthieu Roch\'e, Nicolas Sanson
https://arxiv.org/abs/2404.02071

Granular aqueous suspensions with controlled inter-particular friction and adhesion
We present a simple route to obtain large quantities of suspensions of non-Brownian particles with stimuli-responsive surface properties to study the relation between their flow and interparticle inter- actions. We perform an alkaline hydrolysis reaction on poly(methyl methacrylate) (PMMA) particles to obtain poly(sodium methacrylate) (PMAA-Na) particles. We characterize the quasi-static macro- scopic frictional response of their aqueous suspensions using a rotating drum. The suspensions are fr…

This https://arxiv.org/abs/2310.06377 has been replaced.
initial toot: https://mastoxiv.page/@ar…

Elevated temperature effects (T > 100 °C) on the interfacial water and microstructure swelling of Na-montmorillonite
Montmorillonite-based barriers are key elements of the engineered barrier systems (EBS) in geological disposal facilities (GDF). Their performance at temperatures above 100 °C is not sufficiently understood to assess the possibility of raising the temperature limits in GDF designs that could reduce construction costs and CO2 footprint. The present work provides new fundamental insights through molecular dynamics (MD) simulations of Na-montmorillonite's water-clay interactions and swelling pres…

Interacting Scalar fields: Dark Matter--Early Dark Energy
Gabriela Garcia-Arroyo, L. Arturo Ure\~na-L\'opez, J. Alberto V\'azquez
https://arxiv.org/abs/2402.08815

Interacting Scalar fields: Dark Matter--Early Dark Energy
The main aim of this work is to explore the possibility that cold dark matter (CDM) and early dark energy (EDE) can be described by canonical scalar fields that are coupled at the level of its conservation equations. The formalism covers dynamical aspects at the background and linear perturbation levels for an arbitrary coupling function, followed by an example of it. We emphasize the impact of this model on the Matter Power Spectrum and the Cosmic Microwave Background (CMB) spectra, with or wi…

Determinantes concorrenciais dos atrasos dos voos no aeroporto e na rota
William E. Bendinelli, Alessandro V. M. Oliveira
https://arxiv.org/abs/2402.11373 …

Determinantes concorrenciais dos atrasos dos voos no aeroporto e na rota
Flight delays are a reality in the modern air industry worldwide. However, studies in the literature have investigated the competitive determinants of delays arising from factors originating at the airport and along the route separately. This work aims to present a national study that used a unifying approach from the literature, considering the local and global effects of competition on delays. The analysis took into account a phenomenon known as the "internalization of externalities" of airpo…

This https://arxiv.org/abs/2312.07977 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_qbi…

Modeling non-genetic information dynamics in cells using reservoir computing
Virtually all cells use energy and ion-specific membrane pumps to maintain large transmembrane gradients of Na$^+$, K$^+$, Cl$^-$, Mg$^{++}$, and Ca$^{++}$. Although they consume up to 1/3 of a cell's energy budget, the corresponding evolutionary benefit of transmembrane ion gradients remain unclear. Here, we propose that ion gradients enable a dynamic and versatile biological system that acquires, analyzes, and responds to environmental information. We hypothesize environmental signals are tra…

View-Consistent 3D Editing with Gaussian Splatting
Yuxuan Wang, Xuanyu Yi, Zike Wu, Na Zhao, Long Chen, Hanwang Zhang
https://arxiv.org/abs/2403.11868 http…

View-Consistent 3D Editing with Gaussian Splatting
The advent of 3D Gaussian Splatting (3DGS) has revolutionized 3D editing, offering efficient, high-fidelity rendering and enabling precise local manipulations. Currently, diffusion-based 2D editing models are harnessed to modify multi-view rendered images, which then guide the editing of 3DGS models. However, this approach faces a critical issue of multi-view inconsistency, where the guidance images exhibit significant discrepancies across views, leading to mode collapse and visual artifacts of…

Large Exciton Binding Energy in the Bulk van der Waals Magnet CrSBr
Shane Smolenski, Ming Wen, Qiuyang Li, Eoghan Downey, Adam Alfrey, Wenhao Liu, Aswin L. N. Kondusamy, Aaron Bostwick, Chris Jozwiak, Eli Rotenberg, Liuyan Zhao, Hui Deng, Bing Lv, Dominika Zgid, Emanuel Gull, Na Hyun Jo
https://arxiv.org/abs/2403.13897

Large Exciton Binding Energy in the Bulk van der Waals Magnet CrSBr
Excitons, bound electron-hole pairs, influence the optical properties in strongly interacting solid state systems. Excitons and their associated many-body physics are typically most stable and pronounced in monolayer materials. Bulk systems with large exciton binding energies, on the other hand, are rare and the mechanisms driving their stability are still relatively unexplored. Here, we report an exceptionally large exciton binding energy in single crystals of the bulk van der Waals antiferrom…

This https://arxiv.org/abs/2403.11698 has been replaced.
initial toot: https://mastoxiv.page/@arX…

Spin-Orbital Ordering in Alkali Superoxides
Akali superoxides AO2 (A=Na, K, Rb, Cs), due to an open p shell of the oxygen ion O2^- with degenerate pi orbitals, have spin and orbital degrees of freedom. The complex magnetic, orbital, and structural phase transitions observed experimentally in this family of materials are only partially understood. Based on density functional theory, we derive a strong-coupling effective model for the isostructural compounds AO2 (A=K, Rb, Cs) from a two-orbital Hubbard model. We find that CsO2 has highly f…

Indispensability of cross-shell contributions in neutron resonance spacing
T. Ghosh, Sangeeta, B. Maheshwari, G. Saxena, B. K. Agrawal
https://arxiv.org/abs/2402.08889

Indispensability of cross-shell contributions in neutron resonance spacing
Spin and parity dependent nuclear level densities (NLDs) are obtained for configuration interaction shell model using a numerically efficient spectral distribution method. The calculations are performed for $^{24}$Na, $^{25,26,27}$Mg nuclei using full $sd$-$pf$ model space that incorporates the cross-shell excitations from $sd$ to $pf$-shell. The NLDs so obtained are then employed to determine the s-wave neutron resonance spacing (D$_0$) which is one of the crucial inputs for the predictions of…

The fundamental plane of blazars based on the black hole spin-mass energy
Xu Zhang, Dingrong Xiong, Quangui Gao, Guiqin Yang, Fangwu Lu, Weiwei Na, Longhua Qin
https://arxiv.org/abs/2403.09088

The fundamental plane of blazars based on the black hole spin-mass energy
We examine the fundamental plane of 91 Blazars which include FSRQs and BL Lacs with known X-ray luminosity ($L_{R}$), radio luminosity ($L_X$), and black hole mass measurements ($M$) to reflect the relationship between jet and accretion for blazars. The fundamental plane of Blazars are log$L_{R}$=${0.273}_{+0.059}^{-0.059}$log$L_X$+${0.695}_{+0.191}^{-0.191}$log$M$+${25.457}_{+2.728}^{-2.728}$ and log$L_{R}$=${0.190}_{+0.049}^{-0.049}$log$L_X$+${0.475}_{+0.157}^{-0.157}$log$M$+${28.568}_{+2.245…

This https://arxiv.org/abs/2402.04039 has been replaced.
link: https://scholar.google.com/scholar?q=a

Electric Field Induced Associations in the Double Layer of Salt-in-Ionic-Liquid Electrolytes
Ionic liquids (ILs) are an extremely exciting class of electrolytes for energy storage applications because of their unique combination of properties. Upon dissolving alkali metal salts, such as Li or Na based salts, with the same anion as the IL, an intrinsically asymmetric electrolyte can be created for use in batteries, known as a salt-in-ionic liquid (SiIL). These SiILs have been well studied in the bulk, where negative transference numbers of the alkali metal cation have been observed from…

Pressure tunable magnetic skyrmion phase in Co8Zn8Mn4 single crystals
Zhun Li, Xinrun Mi, Xinming Wang, Jian Lyu, Na Su, Aifeng Wang, Yisheng Chai, Bao Yuan, Wanju Luo, Hui Cheng, Jianxiang Gao, Hongliang Wang, Lijie Hao, Mingquan He, Junying Shen, Young Sun, Xin Tong
https://arxiv.org/abs/2402.14477

Pressure tunable magnetic skyrmion phase in Co8Zn8Mn4 single crystals
In a magnetic skyrmion phase, magnetic moments form vortex-like topological textures which are of both fundamental and industrial interests. In $β$-Mn-type Co-Zn-Mn alloys, chrial magnetic skyrmions emerge above room temperature, providing a unique system for studying the skrymion physics and exploring spintronics applications. However, the magnetic skyrmion phase is typically confined in a narrow and limited temperature ($T$) and magnetic field ($H$) range. Here, we demonstrate that hydrostat…

Spin-Orbital Ordering in Alkali Superoxides
Kohei Shibata, Makoto Naka, Harald O. Jeschke, Junya Otsuki
https://arxiv.org/abs/2403.11698 https://

Spin-Orbital Ordering in Alkali Superoxides
Akali superoxides AO2 (A=Na, K, Rb, Cs), due to an open p shell of the oxygen ion O2^- with degenerate pi orbitals, have spin and orbital degrees of freedom. The complex magnetic, orbital, and structural phase transitions observed experimentally in this family of materials are only partially understood. Based on density functional theory, we derive a strong-coupling effective model for the isostructural compounds AO2 (A=K, Rb, Cs) from a two-orbital Hubbard model. We find that CsO2 has highly f…

Exciton-photocarrier interference in mixed lead-halide-perovskite nanocrystals
Esteban Rojas-Gatjens, Quinten A. Akkerman, Liberato Manna, Ajay Ram Srimath Kandada, Carlos Silva-Acu\~na
https://arxiv.org/abs/2402.11673

Exciton-photocarrier interference in mixed lead-halide-perovskite nanocrystals
The use of semiconductor nanocrystals in scalable quantum technologies requires characterization of the exciton coherence dynamics in an \emph{ensemble} of electronically isolated crystals in which system-bath interactions are nevertheless strong. In this communication, we identify signatures of Fano-like interference between excitons and photocarriers in the coherent two-dimensional photoluminescence excitation spectral lineshapes of mixed lead-halide perovskite nanocrystals in dilute solution…

Exciton-photocarrier interference in mixed lead-halide-perovskite nanocrystals
Esteban Rojas-Gatjens, Quinten A. Akkerman, Liberato Manna, Ajay Ram Srimath Kandada, Carlos Silva-Acu\~na
https://arxiv.org/abs/2402.11673

Exciton-photocarrier interference in mixed lead-halide-perovskite nanocrystals
The use of semiconductor nanocrystals in scalable quantum technologies requires characterization of the exciton coherence dynamics in an \emph{ensemble} of electronically isolated crystals in which system-bath interactions are nevertheless strong. In this communication, we identify signatures of Fano-like interference between excitons and photocarriers in the coherent two-dimensional photoluminescence excitation spectral lineshapes of mixed lead-halide perovskite nanocrystals in dilute solution…

Two-stage growth for highly ordered epitaxial C$_{60}$ films on Au(111)
Alexandra B. Tully, Rysa Greenwood, MengXing Na, Vanessa King, Erik M{\aa}rsell, Yuran Niu, Evangelos Golias, Arthur K. Mills, Giorgio Levy de Castro, Matteo Michiardi, Darius Menezes, Jiabin Yu, Sergey Zhdanovich, Andrea Damascelli, David J. Jones, Sarah A. Burke
https://…

Two-stage growth for highly ordered epitaxial C$_{60}$ films on Au(111)
As an organic semiconductor and a prototypical acceptor molecule in organic photovoltaics, C$_{60}$ has broad relevance to the world of organic thin film electronics. Although highly uniform C$_{60}$ thin films are necessary to conduct spectroscopic analysis of the electronic structure of these C$_{60}$-based materials, reported C$_{60}$ films show a relatively low degree of order beyond a monolayer. Here, we develop a generalizable two-stage growth technique that consistently produces single-d…

This https://arxiv.org/abs/2403.07826 has been replaced.
initial toot: https://mastoxiv.page/@a…

Computational modelling of complex multiphase behavior of environmentally-friendly materials for sustainable technological solutions
This study presents a computational framework to investigate and predict the complicated multiphase properties of eco-friendly lead-free piezoelectric materials, which are crucial for sustainable technological progress. Although their electromechanical properties vary by phase, lead-free piezoelectric materials show a considerable thermo-electromechanical response. Lead-free materials such as Bi$_{0.5}$Na$_{0,5}$TiO$_{3}$ (BNT) and other BNT-type piezoelectric materials transition to rhombohedr…