cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Visualidade dialética: imagem e montagem em Harun Farocki
Creators: name: Arçari, André Nascimento
Publisher: name: Labfront/UEMG
Year: 2023

description: A comunicação analisa parte dos trabalhos do artista Harun Farocki (1944-2014) a partir da lógica da montagem. Partimos do filme-ensaio Bilder der Welt und Inschrift des Krieges (1988) e a videoinstalação Ernste Spiele I-IV (2009-2010) para uma leitura que relaciona essas obras com escritos de Philippe-Alain Michaud sobre filme e os ensaios de Georges Didi-Huberman sobre o artista. Diante da imagem-montagem farockiana e suas imagens de imagens, a visualidade torna-se ferramenta dialética para comparar e comentar, em reorganizações, uma mesma situação do mundo, cada vez mais reduzido a critérios de objetividade. Farocki se vale de imagens operacionais, cujos fins técnicos, científicos ou militar são problematizados, indagando a importância da téchnē. Entretanto essas produções nos colocam uma persistente reflexão: por que a alta tecnologia, a priori, é destinada para fins militares para só depois ser massivamente assimilada aos usos civis?
Characterizing the Hofstadter butterfly's outline with Chern numbers
Creators: name: Goldman, N.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: In this work, we report original properties inherent to independent particles subjected to a magnetic field by emphasizing the existence of regular structures in the energy spectrum's outline. We show that this fractal curve, the well-known Hofstadter butterfly's outline, is associated to a specific sequence of Chern numbers that correspond to the quantized transverse conductivity. Indeed the topological invariant that characterizes the fundamental energy band depicts successive stairways as the magnetic flux varies. Moreover each stairway is shown to be labeled by another Chern number which measures the charge transported under displacement of the periodic potential. We put forward the universal character of these properties by comparing the results obtained for the square and the honeycomb geometries.
description: Accepted for publication in J. Phys. B (Jan 2009)
COPER: a Query-adaptable Semantics-based Search Engine for Persian COVID-19 Articles
Creators: name: Khanmohammadi, Reza
name: Mirshafiee, Mitra Sadat
name: Allahyari, Mehdi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: With the surge of pretrained language models, a new pathway has been opened to incorporate Persian text contextual information. Meanwhile, as many other countries, including Iran, are fighting against COVID-19, a plethora of COVID-19 related articles has been published in Iranian Healthcare magazines to better inform the public of the situation. However, finding answers in this sheer volume of information is an extremely difficult task. In this paper, we collected a large dataset of these articles, leveraged different BERT variations as well as other keyword models such as BM25 and TF-IDF, and created a search engine to sift through these documents and rank them, given a user's query. Our final search engine consists of a ranker and a re-ranker, which adapts itself to the query. We fine-tune our models using Semantic Textual Similarity and evaluate them with standard task metrics. Our final method outperforms the rest by a considerable margin.
description: 7 pages
Nagorny Karabakh: Causes of the Conflict and Ways to Solve It
Creators: name: Yamskov, A.N.
Publisher: name: Zenodo
Year: 1991
Subjects: Karabakh
ethnic conflict

description: The present work is based on the author’s report, revised in 1988-1989, that was originally conveyed to the Director’s office, Institute of Ethnography, USSR Academy of Sciences (Moscow) in August of 1988. It is an attempt to reveal the underlying causes of the conflict around Nagorno Karabakh and, as far as possible, to analyse some of the proposed measures to eliminate them.
Imagens intersemióticas: a percepção e experiência estética do sublime no erotismo poético do Dr.  ngelo Monaqueu
Creators: name: Kimura, Maria Celia Moro
Publisher: name: Labfront/UEMG
Year: 2023

description: Tomando como base a sensualidade na obra do Dr.  ngelo Monaqueu, heterônimo do Prof. Dr. Omar Khouri, será explorada a percepção na obra visual número  15 do artista. Apresentada no livro Poemas da Mãe, a imagem conduz o expectador a uma experiência estética em que a sensualidade implícita/explícita no poema intersemiótico, traduz em quase brutalidade visual, a intencionalidade do Sublime de Longino. Afirma a experiência do espectador em uma pansemiótica metafísica utilizando a experiência poética, a percepção de forma e conteúdo, tanto como o juízo estético kantiano para a harmonização da expressão sensível e fenomenológica da arte, onde fruição da obra torna possível a apreensão do conteúdo a partir da percepção iniciada na contemplação.
MCMC-based Voigt Profile fitting to a Mini-BAL System in the Quasar UM675
Creators: name: Ishita, Dai
name: Misawa, Toru
name: Itoh, Daisuke
name: Charlton, Jane C.
name: Eracleous, Michael
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: We introduce a Bayesian approach coupled with a Markov Chain Monte Carlo (MCMC) method and the maximum likelihood statistic for fitting the profiles of narrow absorption lines (NALs) in quasar spectra. This method also incorporates overlap between different absorbers. We illustrate and test this method by fitting models to a "mini-broad" (mini-BAL) and six NAL profiles in four spectra of the quasar UM675 taken over a rest-frame interval of 4.24 years. Our fitting results are consistent with past results for the mini-BAL system in this quasar by Hamann et al. (1997b). We also measure covering factors ($C_{\rm f}$) for two narrow components in the CIV and NV mini-BALs and their overlap covering factor with the broad component. We find that $C_{\rm f}$(NV) is always larger than $C_{\rm f}$(CIV) for the broad component, while the opposite is true for the narrow components in the mini-BAL system. This could be explained if the broad and narrow components originated in gas at different radial distances, but it seems more likely to be due to them produced by gas at the same distance but with different gas densities (i.e., ionization states). The variability detected only in the broad absorption component in the mini-BAL system is probably due to gas motion since both $C_{\rm f}$(CIV) and $C_{\rm f}$(NV) vary. We determine for the first time that multiple absorbing clouds (i.e., a broad and two narrow components) overlap along our line of sight. We conclude that the new method improves fitting results considerably compared to previous methods.
description: 18 pages, 12 figures, accepted for publication in ApJ
Adaptive Model Refinement Approach for Bayesian Uncertainty Quantification in Turbulence Model
Creators: name: Zeng, Fanzhi
name: Zhang, Wei
name: Li, Jinping
name: Zhang, Tianxin
name: Yan, Chao
Publisher: name: arXiv
Year: 2022
Subjects: subject: Data Analysis, Statistics and Probability (physics.data-an)
subject: Fluid Dynamics (physics.flu-dyn)
subject: FOS: Physical sciences

description: The Bayesian uncertainty quantification technique has become well established in turbulence modeling over the past few years. However, it is computationally expensive to construct a globally accurate surrogate model for Bayesian inference in a high-dimensional design space, which limits uncertainty quantification for complex flow configurations. Borrowing ideas from stratified sampling and inherited sampling, an adaptive model refinement approach is proposed in this work, which concentrates on asymptotically improving the local accuracy of the surrogate model in the high-posterior-density region by adaptively appending model evaluation points. To achieve this goal, a modification of inherited Latin hypercube sampling is proposed and then integrated into the Bayesian framework. The effectiveness and efficiency of the proposed approach are demonstrated through a two-dimensional heat source inversion problem and its extension to a high-dimensional design space. Compared with the prior-based method, the adaptive model refinement approach has the ability to obtain more reliable inference results using fewer evaluation points. Finally, the approach is applied to parametric uncertainty quantification of the Menter shear-stress transport turbulence model for an axisymmetric transonic bump flow and provides convincing numerical results.
description: 35 pages, 21 figures, accepted by AIAA Journal
Эталонное описание устройства Сфираль
Creators: name: Басаргин, Олег Сергеевич
Publisher: name: Zenodo
Year: 2025

description: Устройство "Сфираль" представляет собой топологически устойчивую структуру, состоящую из двух зеркально антисимметричных витков, соединённых S-образным элементом. Она является самостоятельным объектом с возможностью проявления фрактальных свойств. Эти свойства могут быть выражены как в физической реализации устройства (например, при многоуровневом построении), так и в динамике процессов.
Neutral bremsstrahlung and excimer electroluminescence in noble gases and its relevance to two-phase dark matter detectors
Creators: name: Borisova, E.
name: Buzulutskov, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Proportional electroluminescence (EL) is the physical effect used in two-phase detectors for dark matter searches, to optically record (in the gas phase) the ionization signal produced by particle scattering in the liquid phase. In our previous work the presence of a new EL mechanism, namely that of neutral bremsstrahlung (NBrS), was demonstrated in two-phase argon detectors both theoretically and experimentally, in addition to the ordinary EL mechanism due to excimer emission. In this work the similar theoretical approach is applied to all noble gases, i.e. overall to helium, neon, argon, krypton and xenon, to calculate the EL yields and spectra both for NBrS and excimer EL. The relevance of the results obtained to the development of two-phase dark matter detectors is discussed.
description: 14 pages, 14 figures, 1 table
Quantum magnetic oscillations in Weyl semimetals with tilted nodes
Creators: name: Vadnais, Samuel
name: Cote, Rene
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: A Weyl semimetal (WSM)\ is a three-dimensional topological phase of matter where pairs of nondegenerate bands cross at isolated points in the Brillouin zone called Weyl nodes. Near these points, the electronic dispersion is gapless and linear. A magnetic field $B$ changes this dispersion into a set of Landau levels which are dispersive along the direction of the magnetic field only. The $n=0$ Landau level is special since its dispersion$\ $is linear and unidirectional. The presence of this chiral level distinguishes Weyl from Schrödinger fermions. In this paper, we study the quantum oscillations of the orbital magnetization and magnetic susceptibility in Weyl semimetals. We generalise earlier works% \cite{Mikitik2019} on these De Haas-Van Alphen oscillations by considering the effect of a tilt of the Weyl nodes. We study how the fundamental period of the oscillations in the small $B$ limit and the strength of the magnetic field $B_{1}$ required to reach the quantum limit are modified by the magnitude and orientation of the tilt vector $\mathbf{t}$. We show that the magnetization from a single node is finite in the $B\rightarrow 0$ limit. Its sign depends on the product of the chirality and sign of the tilt component along the magnetic field direction. We also study the magnetic oscillations from a pair of Weyl nodes with opposite chirality and with opposite or identical tilt. Our calculation shows that these two cases lead to a very different behavior of the magnetization in the small and large $B$ limits. We finally consider the effect of an energy shift $\pm Δ_{0}$ of a pair of Weyl nodes on the magnetic oscillations. We assume a constant density of carriers so that both nodes share a common Fermi level. Our calculation can easily be extended to a WSM with an arbitrary number of pairs of Weyl nodes.
description: 15 pages with 11 figures
A Broader Picture of Random-walk Based Graph Embedding
Creators: name: Huang, Zexi
name: Silva, Arlei
name: Singh, Ambuj
Publisher: name: arXiv
Year: 2021
Subjects: subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Graph embedding based on random-walks supports effective solutions for many graph-related downstream tasks. However, the abundance of embedding literature has made it increasingly difficult to compare existing methods and to identify opportunities to advance the state-of-the-art. Meanwhile, existing work has left several fundamental questions -- such as how embeddings capture different structural scales and how they should be applied for effective link prediction -- unanswered. This paper addresses these challenges with an analytical framework for random-walk based graph embedding that consists of three components: a random-walk process, a similarity function, and an embedding algorithm. Our framework not only categorizes many existing approaches but naturally motivates new ones. With it, we illustrate novel ways to incorporate embeddings at multiple scales to improve downstream task performance. We also show that embeddings based on autocovariance similarity, when paired with dot product ranking for link prediction, outperform state-of-the-art methods based on Pointwise Mutual Information similarity by up to 100%.
description: Accepted to KDD 2021
Quantum eraser from duality--entanglement perspective
Creators: name: Maleki, Yusef
name: Liu, Jiru
name: Zubairy, M. Suhail
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Wave-particle duality is a bizarre feature at the heart of quantum mechanics which refers to the mutually exclusive dual attributes of quantum objects as the wave and the particle. Quantum eraser presents a counterintuitive aspect of the wave-particle duality. In this work, we show that quantum eraser can be quantitatively understood in terms of the recently developed duality--entanglement relation. In other words, we show that wave-particle-entanglement triality captures all the physics of the quantum erasure. We find that a controllable partial erasure of the which-path information is attainable, enabling the partial recovery of the quantum interference and extending the scope of the conventional quantum eraser protocols.
description: 4 figures
Supplemental Material from Mitonuclear interactions alter sex-specific longevity in a species without sex chromosomes
Creators: name: Flanagan, Ben A.
name: Li, Ning
name: Edmands, Suzanne
Publisher: name: The Royal Society
Year: 2021
Subjects: subject: Genetics
subject: FOS: Biological sciences
subject: Evolutionary Biology

description: Impaired mitochondrial function can lead to senescence and the ageing phenotype. Theory predicts degenerative ageing phenotypes and mitochondrial pathologies may occur more frequently in males due to the matrilineal inheritance pattern of mitochondrial DNA observed in most eukaryotes. Here, we estimated the sex-specific longevity for parental and reciprocal F1 hybrid crosses for inbred lines derived from two allopatric Tigriopus californicus populations with over 20% mitochondrial DNA divergence. T. californicus lacks sex chromosomes allowing for more direct testing of mitochondrial function in sex-specific ageing. To better understand the ageing mechanism, we estimated two age-related phenotypes (mtDNA content and 8-hydroxy-20-deoxyguanosine (8-OH-dG) DNA damage) at two time points in the lifespan. Sex differences in lifespan depended on the mitochondrial and nuclear backgrounds, including differences between reciprocal F1 crosses which have different mitochondrial haplotypes on a 50 : 50 nuclear background, with nuclear contributions coming from alternative parents. Young females showed the highest mtDNA content which decreased with age, while DNA damage in males increased with age and exceed that of females 56 days after hatching. The adult sex ratio was male-biased and was attributed to complex mitonuclear interactions. Results thus demonstrate that sex differences in ageing depend on mitonuclear interactions in the absence of sex chromosomes.
On asymmetric dark matter constraints from the asteroseismology of a subgiant star
Creators: name: Rato, João
name: Lopes, José
name: Lopes, Ilídio
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: The asteroseismic modelling of solar-like stars has proved to be valuable in constraining dark matter. In this work we study for the first time the influence of asymmetric dark matter (ADM) in the evolution of a subgiant star (KIC 8228742) by direct comparison with observational data. Both spectroscopic and seismic data are analysed with a new approach to the stellar calibration method, in which DM properties can also be considered as free inputs. In another phase of this study, a calibrated standard stellar model (without DM) is used as the benchmark for DM models. We find that the latter models consistently outperform the former for $10^{-40} \leq σ_\mathrm{SD} < 10^{-38}$ cm$^2$, hinting that the presence of ADM in stars of this type does not go against observations. Moreover, we show that stellar seismology allows us to suggest exclusion limits that complement the constraints set by direct detection experiments. Different seismic observables are proposed to study DM properties and $ΔΠ_\ell$ is found to be the most reliable, having the potential to build future DM exclusion diagrams. This new methodology can be a powerful tool in the analysis of the data coming from the next generation of asteroseismic missions.
description: 10 pages, 8 figures, 1 table
Deep learning based parameter search for an agent based social network model
Creators: name: Murase, Yohsuke
name: Jo, Hang-Hyun
name: Török, János
name: Kertész, János
name: Kaski, Kimmo
Publisher: name: arXiv
Year: 2021
Subjects: subject: Physics and Society (physics.soc-ph)
subject: Social and Information Networks (cs.SI)
subject: FOS: Physical sciences
subject: FOS: Computer and information sciences

description: Interactions between humans give rise to complex social networks that are characterized by heterogeneous degree distribution, weight-topology relation, overlapping community structure, and dynamics of links. Understanding such networks is a primary goal of science due to serving as the scaffold for many emergent social phenomena from disease spreading to political movements. An appropriate tool for studying them is agent-based modeling, in which nodes, representing persons, make decisions about creating and deleting links, thus yielding various macroscopic behavioral patterns. Here we focus on studying a generalization of the weighted social network model, being one of the most fundamental agent-based models for describing the formation of social ties and social networks. This Generalized Weighted Social Network (GWSN) model incorporates triadic closure, homophilic interactions, and various link termination mechanisms, which have been studied separately in the previous works. Accordingly, the GWSN model has an increased number of input parameters and the model behavior gets excessively complex, making it challenging to clarify the model behavior. We have executed massive simulations with a supercomputer and using the results as the training data for deep neural networks to conduct regression analysis for predicting the properties of the generated networks from the input parameters. The obtained regression model was also used for global sensitivity analysis to identify which parameters are influential or insignificant. We believe that this methodology is applicable for a large class of complex network models, thus opening the way for more realistic quantitative agent-based modeling.
description: 12 pages, 4 figures, 3 tables, 1 pseudocode
Bright single-mode RR Lyrae stars: matching Gaia EDR3 with pulsation and evolutionary models
Creators: name: Kovacs, Geza
name: Karamiqucham, Behrooz
Publisher: name: arXiv
Year: 2021
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We combine observed metallicity, optical and infrared magnitudes with evolutionary and pulsation models to derive average luminosities for 156 single-mode RR Lyrae stars. These luminosities are compared with those obtained from the Gaia EDR3 parallaxes, and found in excellent agreement with the high accuracy subsample (62 stars, with relative parallax errors less than 2%). With the temperature and metallicity scale used, no parallax shift seems to be necessary when alpha-enhanced evolutionary models are employed. Some 10% of the sample shows curious `distance keeping' between the evolutionary and pulsation models. The cause of this behavior is not clear at this moment but can be cured by an excessive increase of the reddening.
description: Submitted to A&A Letters. After the 1st (positive) referee report. Size: 0.24Mb
OGLE-2017-BLG-1434Lb: Confirmation of a Cold Super-Earth using Keck Adaptive Optics
Creators: name: Blackman, J. W.
name: Beaulieu, J. -P.
name: Cole, A. A.
name: Koshimoto, N.
name: Vandorou, A.
name: Bhattacharya, A.
name: Marquette, J. -B.
name: Bennett, D. P.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Earth and Planetary Astrophysics (astro-ph.EP)
subject: FOS: Physical sciences

description: The microlensing event OGLE-2017-BLG-1434 features a cold super-Earth planet which is one of eleven microlensing planets with a planet-host star mass ratio $q < 1 \times 10^{-4}$. We provide an additional mass-distance constraint on the lens host using near-infrared adaptive optics photometry from Keck/NIRC2. We are able to determine a flux excess of $K_L = 16.96 \pm 0.11$ which most likely comes entirely from the lens star. Combining this with constraints from the large Einstein ring radius, $θ_E=1.40 \pm 0.09\;mas$ and OGLE parallax we confirm this event as a super-Earth with mass $m_p = 4.43 \pm 0.25M_\odot$. This system lies at a distance of $D_L = 0.86 \pm 0.05\,kpc$ from Earth and the lens star has a mass of $M_L=0.234\pm0.012M_\odot$. We confirm that with a star-planet mass ratio of $q=0.57 \times 10^{-4}$, OGLE-2017-BLG-1434 lies near the inflexion point of the planet-host mass-ratio power law.
description: 7 pages, 4 figures
Benchdamic: benchmarking of differential abundance methods on microbiome data
Creators: name: Calgaro, Matteo
name: Romualdi, Chiara
name: Risso, Davide
name: Vitulo, Nicola
Publisher: name: F1000 Research Limited
Year: 2021

description: The correct identification of differentially abundant microbial taxa between experimental conditions is a methodological and computational challenge. Recent work has produced methods to deal with the high sparsity and compositionality characteristic of microbiome data, but independent benchmarks are lacking.
 benchdamic is a R package, available on the Bioconductor platform, that implements a series of analysis for microbiome data according to a previously published work (Calgaro et al., 2020). It is the acronym for BENCHmarking of Differential Abundance detection methods for MICrobial data.
 Not only does the package structure allow the users to test a variety of commonly used methods for differential abundance analysis, but it also enables them to set benchmarks including custom methods on their datasets. Performances of each method are evaluated with respect to i) suitability of distributional assumptions, ii) ability to control false discoveries, iii) concordance of the findings, and iv) enrichment of differentially abundant microbial species in specific conditions. Each step of the assessment is flexible when it comes to the choice of differential abundance methods, their parameters, and input data types. Various graphic outputs lead the users to an informed decision when evaluating the most suitable method to use for their data.
Food composition triggers early sex differentiation of a shrimp: a transcriptomic analysis
Creators: name: Glaviano, Francesca
name: Somma, Emanuele
name: Mutalipassi, Mirko
name: Ruocco, Nadia
name: Viel, Thomas
name: Nieri, Paola
name: Esposito, Francesco
name: Aflalo, Eliahu D.
name: Sagi, Amir
name: Zupo, Valerio
name: Costantini, Maria
Publisher: name: F1000 Research Limited
Year: 2021

description: The shrimp Hippolyte inermis undergoes a well-known process of sex reversal triggered by the ingestion of benthic diatoms. However, we still need to elucidate the structure of the wound-activated diatom’s compound, and research is ongoing to clarify its very selective mechanism of action. The shrimp co-evolved with diatoms (Cocconeis spp.) seasonally present on the leaf stratum of various seagrasses and in particular in Posidonia oceanica meadows. The peculiar reproductive strategy of the shrimp, seasonally mixing two different sexual determination phases, protandric in fall, and apparently gonochoristic in spring, facilitates the survival in a highly competitive benthic environment. In the present work a de novo transcriptome of this crustacean, following experimental administration of diatoms to young post-larvae. The sex ratio of diatom-fed shrimps was altered and their transcriptome revealed dramatic physiological modifications, compared to shrimps fed on control diets. A wide transcriptomic analysis provided powerful supporting evidence that gene networks are deeply impacted by diatom’s metabolites, and that the protandric sexual differentiation involves various mechanisms of programmed cell death, noticeably influencing the shrimp physiology just a few days after settlement.
Precision determination of the ground-state hyperfine splitting of trapped ${}^{113}$Cd${}^{+}$ ions
Creators: name: Miao, S. N.
name: Zhang, J. W.
name: Qin, H. R.
name: Xin, N. C.
name: Han, J. Z.
name: Wang, L. J.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Atomic Physics (physics.atom-ph)
subject: FOS: Physical sciences

description: We measured the ground-state hyperfine splitting of trapped ${}^{113}$Cd${}^{+}$ ions to be 15199862855.02799(27) Hz with a fractional uncertainty of $1.8\times10^{-14}$. The ions were trapped and laser-cooled in a linear quadrupole Paul trap. The fractional frequency stability was measured to be ${4.2} \times 10^{-13}/\sqrtτ $, obtained from Ramsey fringes of high signal-to-noise ratio and taken over a measurement time of nearly 5 hours, which is close to the short-term stability limit estimated from the Dick effect. Our result is consistent with previous reported values, but the measurement precision is four times better than the best result obtained to date.
Single-energy partial wave analysis for pion photoproduction with fixed-t analyticity
Creators: name: Osmanović, H.
name: Hadžimehmedović, M.
name: Omerović, R.
name: Stahov, J.
name: Kashevarov, V.
name: Ostrick, M.
name: Tiator, L.
name: Švarc, A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: Experimental data for pion photoproduction including differential cross sections and various polarization observables from four reaction channels, $γp \to π^0 p$, $γp \to π^+n$, $γn \to π^- p$ and $γn \to π^0 n$ from threshold up to $W=2.2$ GeV have been used in order to perform a single-energy partial wave analysis with minimal model dependence by imposing constraints from unitarity and fixed-$t$ analyticity in an iterative procedure. Reaction models were only used as starting point in the very first iteration. We demonstrate that with this procedure partial wave amplitudes can be obtained which show only a minimal dependence on the initial model assumptions. The analysis has been obtained in full isospin, and the Watson theorem is enforced for energies below $W=1.3$ GeV but is even fulfilled up to $W\approx 1.6$ GeV in many partial waves. Electromagnetic multipoles $E_{\ell\pm}$ and $M_{\ell\pm}$ are presented and discussed for $S,P,D$ and $F$-waves.
description: 36 pages, 31 figures. arXiv admin note: substantial text overlap with arXiv:1908.05167
Hurricane's DNA: O Brega Ciberpunk como base criativa para uma Narrativa Audiovisual
Creators: name: Souto, Léo Pimentel
name: Franco, Edgar Silveira
Publisher: name: Labfront/UEMG
Year: 2023

description: Este artigo apresenta o processo criativo da narrativa audiovisual Hurricane's DNA, destacando os aspectos da música do Posthuman Tantra que resgata a sonoridade electro-industrial digital do emblemático álbum Pissing Nanorobots (2004) e está contextualizada no universo ficcional transmídia da Aurora Pós-Humana (FRANCO, 2017). Também apresenta em detalhes as opções estéticas da produção do videoclipe em um contexto de criação gerido pelo conceito de zineasta (SOUTO, 2021), criando uma visualidade que se afina à crítica incisiva ao Binarismo Anticósmico (FRANCO, 2021). Assim o noise ruidoso e implosivo que embala o universo ficcional da Aurora Pós-Humana em seu colapso final, o Ocaso Pós-Humanista, ganhou uma estética iconoclasta e irônica que reconfigura e ressignifica as famigeradas dancinhas de TikTok, propondo uma nova categoria para a ficção científica, o “brega ciberpunk”.
The Effects of Interactive AI Design on User Behavior: An Eye-tracking Study of Fact-checking COVID-19 Claims
Creators: name: Shi, Li
name: Bhattacharya, Nilavra
name: Das, Anubrata
name: Lease, Matthew
name: Gwidzka, Jacek
Publisher: name: arXiv
Year: 2022
Subjects: subject: Human-Computer Interaction (cs.HC)
subject: Computation and Language (cs.CL)
subject: Information Retrieval (cs.IR)
subject: FOS: Computer and information sciences

description: We conducted a lab-based eye-tracking study to investigate how the interactivity of an AI-powered fact-checking system affects user interactions, such as dwell time, attention, and mental resources involved in using the system. A within-subject experiment was conducted, where participants used an interactive and a non-interactive version of a mock AI fact-checking system and rated their perceived correctness of COVID-19 related claims. We collected web-page interactions, eye-tracking data, and mental workload using NASA-TLX. We found that the presence of the affordance of interactively manipulating the AI system's prediction parameters affected users' dwell times, and eye-fixations on AOIs, but not mental workload. In the interactive system, participants spent the most time evaluating claims' correctness, followed by reading news. This promising result shows a positive role of interactivity in a mixed-initiative AI-powered system.
Analysis of Burning Area from Forest Fire using Sentinel-2 image: A Case Study of Pai, Mae Hong Son Province
Creators: name: Nawaphon Linta
Publisher: name: Faculty of Informatics, Mahasarakham University
Year: 2021
Subjects: Normalized burn ratio
Normalized difference water index
Relativized burn ratio

description: Journal of Applied Informatics and Technology, 3, 2, 101-121
Local mixture models of exponential families
Creators: name: Anaya-Izquierdo, Karim
name: Marriott, Paul
Publisher: name: arXiv
Year: 2007
Subjects: subject: Statistics Theory (math.ST)
subject: FOS: Mathematics

description: Exponential families are the workhorses of parametric modelling theory. One reason for their popularity is their associated inference theory, which is very clean, both from a theoretical and a computational point of view. One way in which this set of tools can be enriched in a natural and interpretable way is through mixing. This paper develops and applies the idea of local mixture modelling to exponential families. It shows that the highly interpretable and flexible models which result have enough structure to retain the attractive inferential properties of exponential families. In particular, results on identification, parameter orthogonality and log-concavity of the likelihood are proved.
description: Published at http://dx.doi.org/10.3150/07-BEJ6170 in the Bernoulli (http://isi.cbs.nl/bernoulli/) by the International Statistical Institute/Bernoulli Society (http://isi.cbs.nl/BS/bshome.htm)
Robust Sliding Mode Control of a Magnetic Levitation System: Continuous-Time and Discrete-Time Approaches
Creators: name: Vernekar, Pratik
name: Bandal, Vitthal
Publisher: name: arXiv
Year: 2021
Subjects: subject: Systems and Control (eess.SY)
subject: Optimization and Control (math.OC)
subject: FOS: Electrical engineering, electronic engineering, information engineering
subject: FOS: Mathematics

description: This paper presents three types of sliding mode controllers for a magnetic levitation system. First, a proportional-integral sliding mode controller (PI-SMC) is designed using a new switching surface and a proportional plus power rate reaching law. The PI-SMC is more robust than a feedback linearization controller in the presence of mismatched uncertainties and outperforms the SMC schemes reported recently in the literature in terms of the convergence rate and settling time. Next, to reduce the chattering phenomenon in the PI-SMC, a state feedback-based discrete-time SMC algorithm is developed. However, the disturbance rejection ability is compromised to some extent. Furthermore, to improve the robustness without compromising the chattering reduction benefits of the discrete-time SMC, mismatched uncertainties like sensor noise and track input disturbance are incorporated in a robust discrete-time SMC design using multirate output feedback (MROF). With this technique, it is possible to realize the effect of a full-state feedback controller without incurring the complexity of a dynamic controller or an additional discrete-time observer. Also, the MROF-based discrete-time SMC strategy can stabilize the magnetic levitation system with excellent dynamic and steady-state performance with superior robustness in the presence of mismatched uncertainties. The stability of the closed-loop system under the proposed controllers is proved by using the Lyapunov stability theory. The simulation results and analytical comparisons demonstrate the effectiveness and robustness of the proposed control schemes.
description: 14 pages, 10 figures
Comments on Solutions for Nonsingular Currents in Open String Field Theories
Creators: name: Kishimoto, Isao
name: Michishita, Yoji
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We investigate analytic solutions to Witten's bosonic string field theory and Berkovits' WZW-type superstring field theory. We construct solutions with parameters out of simpler ones, using a commutative monoid that includes the family of wedge states. Our solutions are generalizations of solutions for marginal deformations by nonsingular currents, and can also reproduce Schnabl's tachyon vacuum solution in bosonic string field theory. This implies that such known solutions are generated from simple solutions which are based on the identity state. We also discuss gauge transformations and induced field redefinitions for our solutions in both bosonic and super string field theory.
description: 23 pages; v2: PTPTeX, typos corrected
Visualizing coherent molecular rotation in a gaseous medium
Creators: name: Tutunnikov, Ilia
name: Prost, Emilien
name: Steinitz, Uri
name: Béjot, Pierre
name: Hertz, Edouard
name: Billard, Franck
name: Faucher, Olivier
name: Averbukh, Ilya Sh.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: Chemical Physics (physics.chem-ph)
subject: FOS: Physical sciences

description: Inducing and controlling the ultrafast molecular rotational dynamics using shaped laser fields is essential in numerous applications. Several approaches exist that allow following the coherent molecular motion in real-time, including Coulomb explosion-based techniques and recovering molecular orientation from the angular distribution of high harmonics. We theoretically consider a non-intrusive optical scheme for visualizing the rotational dynamics in an anisotropic molecular gas. The proposed method allows determining the instantaneous orientation of the principal optical axes of the gas. The method is based on probing the sample using ultra-short circularly polarized laser pulses and recording the transmission image through a vortex wave plate. We consider two example excitations: molecular alignment induced by an intense linearly polarized laser pulse and unidirectional molecular rotation induced by a polarization-shaped pulse. The proposed optical method is promising for visualizing the dynamics of complex symmetric- and asymmetric-top molecules.
description: 12 pages, 14 figures
Suppression of Meszaros' Effect in coupled DE
Creators: name: Bonometto, Silvio
name: Mainini, Roberto
Publisher: name: arXiv
Year: 2007
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: A phaenomenological DM-DE coupling could indicate their common origin. Various constraint however exist to such coupling; here we outline that it can suppress Meszaros' effect, yielding transfered spectra with a softer bending above k_{hor,eq}. It could be therefore hard to reconcile these models with both CMB and deep sample data, using a constant spectral index.
description: 4 pages, 4 figures, proceedings of PASCOS 2007, 2-7 July, London
Commercial cultivation of Java apple (Syzygium samarangense) in Dharmapuri district of Tamil Nadu – A case study
Creators: name: K. Indhumathi
name: V.P. Santhi
name: V. Krishnamoorthy
name: P. Paramaguru
Publisher: name: Zenodo
Year: 2021
Subjects: Java Apple
Syzygium samarangense

description: Java apple (Syzygium samarangense) is a tropical plant, cultivated and naturalized in India, Srilanka and Pacific islands (Morton, 1987). It is being cultivated in Indian states viz. Andhra Pradesh, Kerala and Karnataka (Santhi Sirisha and Shreeja, 2019). In Tamil Nadu the commercial cultivation of Java apple is meager. Dharmapuri district is the northern part of Tamil Nadu is a dry tract with tropical climate. Cultivation of Java apple in Dharmapuri district is very experimental as the presence of Java apple is very rare even as a specimen tree in that locality. The study site has 100 numbers of trees of age 3 years. Planting was done in a spacing of 4.5 x 4.5 m. After planting, the orchard was almost of zero management except the initial weeding and drip irrigation. The initial establishment cost was around ₹. 35000.00 including the planting material and planting cost. The trees started bearing form the second year. Harvesting was done during December to April. The average yield per tree was 55.0 kg. The average farm gate price for the unripe and ripe fruits was ₹. 70.00 and ₹. 80.00 respectively. The incidence of pest and disease was almost zero since planting. Harvesting is also very easy that a woman about can harvest 150.0 kg per hour. The benefit cost ratio is 10:1 in the third year. Since Bengaluru market is of metropolitan nature and is nearby the scope for the cultivation of Java apple in Dharmapuri district of Tamil Nadu seems successful.
Livro didático digital e seu consumo em escolas
Creators: name: Lelis, Camila Rita
Publisher: name: Labfront/UEMG
Year: 2023

description: O foco deste trabalho consiste em refletir sobre as contribuições e desafios do uso do Livro Didático Digital de língua portuguesa no processo de ensino e aprendizagem. Nos últimos anos, as editoras vêm apresentando para as escolas uma nova materialidade do livro didático, denominada por elas como Livro digital. Logo, a partir da análise de obras disponibilizadas por duas editoras, tenho como principal objetivo discutir sobre a organização desse material, em comparação à versão impressa, quais os recursos eles disponibilizam e como essa materialidade exige do aluno e do professor a habilidade dos Multiletramentos. Assim, partirei de discussões teóricas sobre Gêneros Textuais, Pedagogia dos Multiletramentos e sobre o uso de tecnologia em sala de aula, amparada, principalmente, pelos estudos de Ribeiro (2021), Ribeiro e Albarrán (2020), Marcuschi (2010) e Rojo (2012).
Magnetic properties and superconductivity in the two-dimensional repulsive Hubbard model
Creators: name: Sherman, Alexei
Publisher: name: arXiv
Year: 2021
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: A new method for estimating the parameter ensuring the fulfillment of the Mermin-Wagner theorem in the strong coupling diagram technique (SCDT) for the two-dimensional Hubbard model is suggested. With the precise parameter value, calculated magnetic quantities are in good agreement with the results of numeric and optical-lattice experiments. Obtained spin and charge vertices are used for investigating superconductivity in the $t$-$U$ and $t$-$t'$-$t"$-$U$ Hubbard models in the regime of strong correlations. We found no superconducting transition in the $t$-$U$ model. In the $t$-$t'$-$t"$-$U$ model, the transition occurs for the singlet $d_{x^2-y^2}$ pairing at $T_c\approx0.016t$. The difference between the two models is in the renormalized hopping describing electron motion in SCDT. In the $t$-$U$ model, it vanishes for momenta $(π,0)$, $(0,π)$ of extrema of the $d$-wave order parameter, while the hopping is finite in the $t$-$t'$-$t"$-$U$ model. In the one-band model, there are optimal values of $t'$ and $t"$ ensuring the highest $T_c$.
description: 10 pages, 11 figures
Effects of Solar Active Regions on Meridional Flows
Creators: name: Svanda, Michal
name: Kosovichev, Alexander G.
name: Zhao, Junwei
Publisher: name: arXiv
Year: 2008
Subjects: subject: Astrophysics (astro-ph)
subject: FOS: Physical sciences

description: The aim of this paper is to extend our previous study of the solar-cycle variations of the meridional flows and to investigate their latitudinal and longitudinal structure in the subphotospheric layer, especially their variations in magnetic regions. Helioseismology observations indicate that mass flows around active regions are dominated by inflows into those regions. On average, those local flows are more important around leading magnetic polarities of active regions than around the following polarities, and depend on the evolutionary stage of particular active regions. We present a statistical study based on MDI/SOHO observations of 1996-2002 and show that this effect explains a significant part of the cyclic change of meridional flows in near-equatorial regions, but not at higher latitudes. A different mechanism driving solar-cycle variations of the meridional flow probably operates.
description: 4 pages, 5 figures, accepted for publication in ApJL
Propagation and Ghosts in the Classical Kagome Antiferromagnet
Creators: name: Robert, J.
name: Canals, B.
name: Simonet, V.
name: Ballou, R.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We investigate the classical spin dynamics of the kagome antiferromagnet by combining Monte Carlo and spin dynamics simulations. We show that this model has two distinct low temperature dynamical regimes, both sustaining propagative modes. The expected gauge invariance type of the low energy low temperature out of plane excitations is also evidenced in the non linear regime. A detailed analysis of the excitations allows to identify ghosts in the dynamical structure factor, i.e propagating excitations with a strongly reduced spectral weight. We argue that these dynamical extinction rules are of geometrical origin.
description: 4+ pages, 4 figures. Accepted for publication in the Physical Review Letters
Curvature Inspired Cosmological Scenario
Creators: name: Srivastava, S. K.
Publisher: name: arXiv
Year: 2007
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: Astrophysics (astro-ph)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Using modified gravity with non-linear terms of curvature, $R^2$ and $R^{(r +2)}$ (with $r$ being the positive real number and $R$ being the scalar curvature), cosmological scenario,beginning at the Planck scale, is obtained. Here, a unified picture of cosmology is obtained from $f(R)-$ gravity. In this scenario, universe begins with power-law inflation, followed by deceleration and acceleration in the late universe as well as possible collapse of the universe in future. It is different from $f(R)-$ dark energy models with non-linear curvature terms assumed as dark energy. Here, dark energy terms are induced by linear as well as non-linear terms of curvature in Friedmann equation being derived from modified gravity.It is also interesting to see that, in this model, dark radiation and dark matter terms emerge spontaneously from the gravitational sector. It is found that dark energy, obtained here, behaves as quintessence in the early universe and phantom in the late universe. Moreover, analogous to brane-tension in brane-gravity inspired Friedmann equation, a tension term $λ$ arises here being called as cosmic tension. It is found that, in the late universe, Friedmann equation (obtained here) contains a term $- ρ^2/2λ$ ($ρ$ being the phantom energy density) analogous to a similar term in Friedmann equation with loop quantum effects, if $λ> 0$ and brane-gravity correction when $λ< 0.$
description: 19 Pages. To appear in Int. J. Thro. Phys
Entangled photon pairs from a quantum dot cascade decay: the effect of time-reordering
Creators: name: Troiani, F.
name: Tejedor, C.
Publisher: name: arXiv
Year: 2008
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Coulomb interactions between confined carriers remove degeneracies in the excitation spectra of quantum dots. This provides a which path information in the cascade decay of biexcitons, thus spoiling the energy-polarization entanglement of the emitted photon pairs. We theoretically analyze a strategy of color coincidence across generation (AG), recently proposed as an alternative to the previous, within generation (WG) approach. We simulate the system dynamics and compute the correlation functions within the density-matrix formalism. This allows to estimate quantities that are accessible by a polarization-tomography experiment, and that enter the expression of the two-photon concurrence. We identify the optimum parameters within the AG approach, and the corresponding maximum values of the concurrence.