cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Coherent Spin Preparation of Indium Donor Qubits in Single ZnO Nanowires
Creators: name: Viitaniemi, Maria L. K.
name: Zimmermann, Christian
name: Niaouris, Vasileios
name: D'Ambrosia, Samuel H.
name: Wang, Xingyi
name: Kumar, E. Senthil
name: Mohammadbeigi, Faezeh
name: Watkins, Simon P.
name: Fu, Kai-Mei C.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Shallow donors in ZnO are promising candidates for photon-mediated quantum technologies. Utilizing the indium donor, we show that favorable donor-bound exciton optical and electron spin properties are retained in isolated ZnO nanowires. The inhomogeneous optical linewidth of single nanowires (60 GHz) is within a factor of 2 of bulk single-crystalline ZnO. Spin initialization via optical pumping is demonstrated and coherent population trapping is observed. The two-photon absorption width approaches the theoretical limit expected due to the hyperfine interaction between the indium nuclear spin and the donor-bound electron.
Improved bass model using sales proportional average for one condition of mono peak curves
Creators: name: Sleem, Ahmad Abu
name: Alromema, Mohammed
name: Abdel-Aal, Mohammad A. M.
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: "This study provides a modified Bass model to deal with trend curves for basic issues of relevance to individuals from all over the world, for which we collected 16 data sets from 2004 to 2022 and that are available on Google servers as "google trends". It was discovered that the Bass model did not forecast well for curves that have a mono peak with a sharp decrease to some level then have semi-stable with small decrement sales for a long time, thus a new parameter based on r1 and r2 (ratios of average sales) was introduced, which improved the model's prediction ability and provided better results. The model was also applied to a data set taken from the Kaggle website about a subscriber digital product offering for financial services that include newsletters, webinars, and investment recommendations. The data contain 508932 data points about the products sold during 2016-2022. Compared to the traditional Bass model, the modified model showed better results in dealing with this condition, as the expected curve shape was closer to real sales, and the sum of squares error (SSE) value was reduced to a ratio ranging between (36.35-79.3%). Therefore, the improved model can be relied upon in these conditions."
description: "10 pages, 9 figures, Proceedings of International Conference on Computers and Industrial Engineering (CIE), October 30 - November 2, 2023, American University of Sharjah, UAE."
Comodule Algebras and 2-Cocycles over the (Braided) Drinfeld Double
Creators: name: Laugwitz, Robert
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Algebra (math.QA)
subject: Rings and Algebras (math.RA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: 16T05 (Primary), 17B37, 20G42, 18D10 (Secondary)

description: We show that for dually paired bialgebras, every comodule algebra over one of the paired bialgebras gives a comodule algebra over their Drinfeld double via a crossed product construction. These constructions generalize to working with bialgebra objects in a braided monoidal category of modules over a quasitriangular Hopf algebra. Hence two ways to provide comodule algebras over the braided Drinfeld double (the double bosonization) are provided. Furthermore, a map of second Hopf algebra cohomology spaces is constructed. It takes a pair of 2-cocycles over dually paired Hopf algebras and produces a 2-cocycle over their Drinfeld double. This construction also has an analogue for braided Drinfeld doubles.
description: 34 pages, several figures created with Inkscape. Version 2: more references added, small typos corrected. Version 3: Small corrections and further references added. To appear in Comm. Contemp. Math
On the Evidence for Molecular Outflows in High-redshift Dusty Star-forming Galaxies
Creators: name: Nianias, James
name: Lim, Jeremy
name: Yeung, Michael
Publisher: name: arXiv
Year: 2024
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: Galactic-scale outflows of molecular gas from star-forming galaxies constitute the most direct evidence for regulation of star formation. In the early universe ($ z > 4 $), such outflows have recently been inferred from gravitationally-lensed dusty star-forming galaxies (DSFGs) based on ubiquitous detections of OH absorption extending to more blueshifted velocities than [CII] or CO emission in spatially-integrated spectra. Because these lines are redshifted to sub-mm wavelengths, such measurements require careful corrections for atmospheric absorption lines, and a proper accounting of sometimes large variations in measurement uncertainties over these lines. Taking these factors into consideration, we re-analyze OH and [CII] data taken with ALMA for the five sources where such data is available, of which four were categorised as exhibiting outflows. Based on their spatially-integrated spectra alone, we find statistically significant ($ \geq 3 σ$) OH absorption more blueshifted than [CII] emission in only one source. By contrast, searching channel maps for signals diluted below the detection threshold in spatially-integrated spectra, we find evidence for a separate kinematic component in OH absorption in all five sources in the form of: (i) more blueshifted OH absorption than [CII] emission and/or (ii) a component in OH absorption exhibiting a different spatio-kinematic pattern than [CII] emission, the latter presumably tracing gas in a rotating disc. Providing a more complete and accurate assessment of molecular outflows in gravitationally-lensed DSFGs, we suggest methods to better assess the precision of corrections for atmospheric absorption and to more accurately measure the source continuum in future observations.
description: 18 pages, 8 figures, 2 tables
Nested Fermi surfaces and correlated electronic phases in hole-doped semiconductor quantum wells
Creators: name: Li, Tommy
name: Ingham, Julian
name: Scammell, Harley D.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: We demonstrate the existence of novel interaction effects in hole-doped semiconductor quantum wells which are connected to dramatic changes in the Fermi surface geometry occurring upon variation of the doping. We present band structure calculations showing that quantum wells formed in $p$-type cubic semiconductors develop nested Fermi surfaces at a critical hole density set by the width $d$ of the quantum well $k_F\sim π/d$. Nesting gives rise to competing superconducting and charge or spin density wave order, which we analyze using the perturbative renormalization group method. The correlated phases may be created or destroyed by tuning the hole density towards or away from the critical density. Our results establish $p$-type semiconductor quantum wells as a platform for novel correlated phases, which may be precisely controlled using electrostatic gating and external magnetic fields.
Study on Standardizing Working Time: A Case of XYZ Retail Store in Bandung, Indonesia
Creators: name: Putri, Aprodhita Anindya
name: Yunani, Akhmad
Publisher: name: arXiv
Year: 2024
Subjects: subject: General Economics (econ.GN)
subject: FOS: Economics and business

description: Work time standardization helps to find and reduce wasteful movements and time in the workplace, such as chatting, mobile phone use, insufficient rest, or unproductive tasks. This study aims to map the process of displaying products from the warehouse to the shelves and calculate and determine the standard working time of employees of the Operations Division of PT XYZ Branch who oversee displaying X Milk and Y Bread. The data was collected six times in three weeks, including interviews and observations, and took a sample of 20 pieces on each product to carry out data analysis such as data sufficiency tests and control charts. Several time deviations were found in the display process of X Milk products on all observation days in different activities. Whereas in the process of displaying Y Bread, only the deviation of working time was found on the 4th observation day, which proves that the process needs to have a standard working time so that the activity work time is more controlled. Therefore, the analysis is carried out with the calculation of performance rating, time allowance, normal time, and standard time. The result of the standard time calculation for the display process of X Milk products is 15.83 minutes and Y Bread is 9.18 minutes for each product of 20 units.
description: 9 pages, 11 tables, and 3 figures
Director Field Analysis (DFA): Exploring Local White Matter Geometric Structure in diffusion MRI
Creators: name: Cheng, Jian
name: Basser, Peter J.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computer Vision and Pattern Recognition (cs.CV)
subject: Medical Physics (physics.med-ph)
subject: FOS: Computer and information sciences
subject: FOS: Physical sciences

description: In Diffusion Tensor Imaging (DTI) or High Angular Resolution Diffusion Imaging (HARDI), a tensor field or a spherical function field (e.g., an orientation distribution function field), can be estimated from measured diffusion weighted images. In this paper, inspired by the microscopic theoretical treatment of phases in liquid crystals, we introduce a novel mathematical framework, called Director Field Analysis (DFA), to study local geometric structural information of white matter based on the reconstructed tensor field or spherical function field: 1) We propose a set of mathematical tools to process general director data, which consists of dyadic tensors that have orientations but no direction. 2) We propose Orientational Order (OO) and Orientational Dispersion (OD) indices to describe the degree of alignment and dispersion of a spherical function in a single voxel or in a region, respectively; 3) We also show how to construct a local orthogonal coordinate frame in each voxel exhibiting anisotropic diffusion; 4) Finally, we define three indices to describe three types of orientational distortion (splay, bend, and twist) in a local spatial neighborhood, and a total distortion index to describe distortions of all three types. To our knowledge, this is the first work to quantitatively describe orientational distortion (splay, bend, and twist) in general spherical function fields from DTI or HARDI data. The proposed DFA and its related mathematical tools can be used to process not only diffusion MRI data but also general director field data, and the proposed scalar indices are useful for detecting local geometric changes of white matter for voxel-based or tract-based analysis in both DTI and HARDI acquisitions. The related codes and a tutorial for DFA will be released in DMRITool.
description: Accepted by Medical Image Analysis
title: ADCO, Cartulaire de Cîteaux pour les domaines de Beaune (XVe siècle), Cart. 177 (11 H 289), 197 folios, f. 0220
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2015
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: cartulaire
subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris

description: Cartulaire de Cîteaux pour les domaines de Beaune (XVe siècle), Archives départementales de la Côte-d'Or, Cart. 177 (11 H 289), 197 folios, f. 0220, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire de Cîteaux pour les possessions d’Izeure (XVe siècle), Archives départementales de la Côte-d'Or, Cart. 177 (11 H 289), 197 folios, f. 0220, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
Optical Calibration of Holographic Acoustic Tweezers
Creators: name: Marrara, Sonia
name: Ciriza, David Bronte
name: Magazzu, Alessandro
name: Caruso, Roberto
name: Lupo, Giuseppe
name: Saija, Rosalba
name: Foti, Antonino
name: Gucciardi, Pietro G.
name: Mandanici, Andrea
name: Marago, Onofrio M.
name: Donato, Maria Grazia
Publisher: name: arXiv
Year: 2024
Subjects: subject: Optics (physics.optics)
subject: Applied Physics (physics.app-ph)
subject: FOS: Physical sciences

description: Recently, acoustic tweezers based on an array of ultrasonic transducers have been reported taking inspiration from holographic optical tweezers. In the latter technique, the calibration of the optical trap is an essential procedure to obtain the trap stiffnesses. On the contrary, in the case of acoustic tweezers the calibration of the acoustic forces is seldom carried out. To cover this gap, in this work, we adapt the calibration protocols employed in optical tweezers to acoustic tweezers based on arrays of ultrasonic transducers. We measure trap stiffnesses in the mN/m range that are consistent with theoretical estimates obtained by calculations of the acoustic radiation forces based on the Gorkov potential. This work gives a common framework to the optical and acoustic manipulation communities, paving the way to a consistent calibration of hybrid acoustooptical setups.
description: 8 pages, 6 figures
Magnetic Phase Diagram of Frustrated Spin Ladder
Creators: name: Sugimoto, T.
name: Mori, M.
name: Tohyama, T.
name: Maekawa, S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: Frustrated spin ladders show magnetization plateaux depending on the rung-exchange interaction and frustration defined by the ratio of first and second neighbor exchange interactions in each chain. This paper is the first report on its magnetic phase diagram. Using the variational matrix-product state method, we accurately determine phase boundaries. Several kinds of magnetization plateaux are induced by the frustration and the strong correlation among quasi-particles on a lattice. The appropriate description of quasi-particles and their relevant interactions are changed by a magnetic field. We find that the frustration differentiates the triplet quasi-particle from the singlet one in kinetic energy.
description: 11 pages, 4 figures
On STPA for Distributed Development of Safe Autonomous Driving: An Interview Study
Creators: name: Nouri, Ali
name: Berger, Christian
name: Törner, Fredrik
Publisher: name: arXiv
Year: 2024
Subjects: subject: Software Engineering (cs.SE)
subject: Machine Learning (cs.LG)
subject: FOS: Computer and information sciences

description: Safety analysis is used to identify hazards and build knowledge during the design phase of safety-relevant functions. This is especially true for complex AI-enabled and software intensive systems such as Autonomous Drive (AD). System-Theoretic Process Analysis (STPA) is a novel method applied in safety-related fields like defense and aerospace, which is also becoming popular in the automotive industry. However, STPA assumes prerequisites that are not fully valid in the automotive system engineering with distributed system development and multi-abstraction design levels. This would inhibit software developers from using STPA to analyze their software as part of a bigger system, resulting in a lack of traceability. This can be seen as a maintainability challenge in continuous development and deployment (DevOps). In this paper, STPA's different guidelines for the automotive industry, e.g. J31887/ISO21448/STPA handbook, are firstly compared to assess their applicability to the distributed development of complex AI-enabled systems like AD. Further, an approach to overcome the challenges of using STPA in a multi-level design context is proposed. By conducting an interview study with automotive industry experts for the development of AD, the challenges are validated and the effectiveness of the proposed approach is evaluated.
description: Accepted at SEAA. 8 pages, 2 figures
Possible $P$- wave $D_s\bar{D}_{s0}(2317)$ molecular state $Y^{'}(4274)$
Creators: name: Zhu, Hong Qiang
name: Huang, Yin
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: Stimulated by the measurement of the $Jψϕ$ decay model of $Y(4274)$ by the LHCb Collaboration, we consider a possible interpretation of this state as a hadron molecular-a bound state of $D_s$ and $\bar{D}_{s0}(2317)$ mesons. Using effective Lagrangian approach, we calculate the two-body strong decay channels $Y(4274)\to{}J/ψϕ,χ_{c0}η,χ_{c0}η,D^{*}_s\bar{D}_s$, $D\bar{D}^{*}$, $K\bar{K}^{*}$, and $ϕϕ$ through hadronic loops and three-body decays into $π^0{}D_s\bar{D}_s$. In comparison with the LHCb data, our results show that $Y(4274)$ cannot be assigned to be a $D_s\bar{D}_{s0}(2317)$ molecular state. The calculated partial decay widths with $J^P=1^{+}$ $D_s\bar{D}_{s0}$ molecular state picture indicates that allowed decay modes, $χ_{c0}η$ and $χ_{c1}η$, may have the smallest branching ratio and are of the order of 0.0 MeV. Future experimental measurements of such two processes can be quite useful to test the different interpretations of the $Y(4274)$. If $P-$wave $D_s\bar{D}_{s0}$ molecular exist [we marked as $Y^{'}(4274)$], the total decay is at the order of 1.06-1.84 MeV, which seems to be within the reach of the current experiments such as Belle II. In addition, the calculated partial decay widths indicate that allowed decay mode, $D\bar{D}^{*}$, may have the biggest branching ratio. The experimental measurements for this strong decay process could be a crucial to observe such a new state $Y^{'}(4274)$.
description: arXiv admin note: text overlap with arXiv:1811.10769
Additional file 1 of LDL-cholesterol to HDL-cholesterol ratio discordance with lipid parameters and carotid intima-media thickness: a cohort study in China
Creators: name: Lou, Yanmei
name: Li, Xue
name: Cao, Liming
name: Qin, Pei
name: Shi, Jing
name: Zhang, Yanyan
name: Wang, Changyi
name: Ma, Jianping
name: Wang, Li
name: Peng, Xiaolin
name: Chen, Hongen
name: Xu, Shan
name: Hu, Fulan
name: Zhao, Yashuang
name: Zhao, Ping
Publisher: name: figshare
Year: 2020
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Genetics
subject: FOS: Biological sciences
subject: Biotechnology
subject: Chemical Sciences not elsewhere classified
subject: Sociology
subject: FOS: Sociology
subject: Mathematical Sciences not elsewhere classified
subject: Developmental Biology
subject: Computational Biology

description: Additional file 1: Supplementary Table 1. Association between LDL-C/HDL-C ratio concordance with TC and CIMT risk in the subgroup analyses. Supplementary Table 2 Association between LDL-C/HDL-C ratio concordance with TG and CIMT risk in the subgroup analyses. Supplementary Table 3 Association between LDL-C/HDL-C ratio concordance with LDL-C, HDL-C and CIMT risk in the subgroup analyses.
Studying the QGP with Jets at the LHC and RHIC
Creators: name: Cunqueiro, Leticia
name: Sickles, Anne M.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Experiment (nucl-ex)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We review the current status of jet measurements in heavy-ion collisions at the Large Hadron Collider (LHC) and the Relativistic Heavy Ion Collider (RHIC). We discuss how the current measurements provide information about the quark-gluon plasma and discuss near future opportunities at both RHIC and the LHC.
description: review submitted to Progress in Particle and Nuclear Physics
FASER: ForwArd Search ExpeRiment at the LHC
Creators: name: Feng, Jonathan L.
name: Galon, Iftah
name: Kling, Felix
name: Trojanowski, Sebastian
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: Accelerator Physics (physics.acc-ph)
subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: New physics has traditionally been expected in the high-$p_T$ region at high-energy collider experiments. If new particles are light and weakly-coupled, however, this focus may be completely misguided: light particles are typically highly concentrated within a few mrad of the beam line, allowing sensitive searches with small detectors, and even extremely weakly-coupled particles may be produced in large numbers there. We propose a new experiment, ForwArd Search ExpeRiment, or FASER, which would be placed downstream of the ATLAS or CMS interaction point (IP) in the very forward region and operated concurrently there. Two representative on-axis locations are studied: a far location, $400~\text{m}$ from the IP and just off the beam tunnel, and a near location, just $150~\text{m}$ from the IP and right behind the TAN neutral particle absorber. For each location, we examine leading neutrino- and beam-induced backgrounds. As a concrete example of light, weakly-coupled particles, we consider dark photons produced through light meson decay and proton bremsstrahlung. We find that even a relatively small and inexpensive cylindrical detector, with a radius of $\sim 10~\text{cm}$ and length of $5-10~\text{m}$, depending on the location, can discover dark photons in a large and unprobed region of parameter space with dark photon mass $m_{A'} \sim 10~\text{MeV} - 1~\text{GeV}$ and kinetic mixing parameter $ε\sim 10^{-7} - 10^{-3}$. FASER will clearly also be sensitive to many other forms of new physics. We conclude with a discussion of topics for further study that will be essential for understanding FASER's feasibility, optimizing its design, and realizing its discovery potential.
description: 35 Pages, 12 figures. Version 2, references added, minor changes
Neuropsychological assessment of adults with ADHD: A Delphi consensus study
Creators: name: Fuermaier, Anselm B. M.
name: Fricke, Jan A.
name: Vries, Stefanie M. De
name: Tucha, Lara
name: Tucha, Oliver
Publisher: name: Taylor & Francis
Year: 2018
Subjects: subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Neuroscience
subject: Physiology
subject: FOS: Biological sciences
subject: Pharmacology
subject: Biotechnology
subject: Developmental Biology
subject: 111714 Mental Health
subject: FOS: Health sciences
subject: Hematology

description: Within the clinical evaluation of adults with attention deficit hyperactivity disorder (ADHD), cognitive functions are often assessed to characterize individual cognitive problems and guide treatment planning. However, the composition of an adequate neuropsychological assessment battery remains difficult given the large number of cognitive functions that can be distinguished, the variety of available tools to assess these functions, as well as the cognitive heterogeneity that has been observed between individuals with ADHD. Twenty-seven clinicians and researchers experienced in working with adults with ADHD took part in the present study. This study employed the Delphi methodology in order to compose an assessment battery for the measurement of the most important neuropsychological functions by employing the most suitable measures to assess these functions. Consensus between experts was achieved on a ranking of 16 neuropsychological functions that are important for the neuropsychological assessment of adults with ADHD. Furthermore, measures were suggested to assess each of the neuropsychological functions. The assessment battery as composed in the present study may support research and clinical practice in the selection of appropriate functions and measures for the determination of the individual level of cognitive functioning and treatment planning of adults with ADHD.
Generalized Hydrodynamics of the attractive Non-Linear Schroedinger Equation
Creators: name: Koch, Rebekka
name: Caux, Jean-Sébastien
name: Bastianello, Alvise
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: Exactly Solvable and Integrable Systems (nlin.SI)
subject: FOS: Physical sciences

description: We study the generalized hydrodynamics of the one-dimensional classical Non Linear Schroedinger equation in the attractive phase. We thereby show that the thermodynamic limit is entirely captured by solitonic modes and radiation is absent. Our results are derived by considering the semiclassical limit of the quantum Bose gas, where the Planck constant has a key role as a regulator of the classical soliton gas. We use our result to study adiabatic interaction changes from the repulsive to the attractive phase, observing soliton production and obtaining exact analytical results which are in excellent agreement with Monte Carlo simulations.
description: 24 pages, 4 figures
Slowly rotating black holes with exact Killing tensor symmetries
Creators: name: Gray, Finnian
name: Kubiznak, David
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We present a novel family of slowly rotating black hole solutions in four, and higher dimensions, that extend the well known Lense-Thirring spacetime and solve the field equations to linear order in rotation parameter. As "exact metrics" in their own right, the new (non-vacuum) spacetimes feature the following two remarkable properties: i) near the black hole horizon they can be cast in the, manifestly regular, Painlevé-Gullstrand form and ii) they admit exact Killing tensor symmetries. We show these symmetries are inherited from the principal Killing-Yano tensor of the exact rotating black hole geometry in the slow rotation limit. This provides a missing link as to how the exact hidden symmetries emerge as rotation is switched on. Remarkably, in higher dimensions the novel generalized Lense-Thirring spacetimes feature a rapidly growing number of exact irreducible rank-2, as well as higher-rank, Killing tensors -- giving a first example of a physical spacetime with more hidden than explicit symmetries.
description: 7 pages, no figures, v3: minor changes
Closed warped G$_2$-structures evolving under the Laplacian flow
Creators: name: Fino, Anna
name: Raffero, Alberto
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We study the behaviour of the Laplacian flow evolving closed G$_2$-structures on warped products of the form $M^6\times{\mathbb S}^1$, where the base $M^6$ is a compact 6-manifold endowed with an SU(3)-structure. In the general case, we reinterpret the flow as a set of evolution equations on $M^6$ for the differential forms defining the SU(3)-structure and the warping function. When the latter is constant, we find sufficient conditions for the existence of solutions of the corresponding coupled flow. This provides a method to construct immortal solutions of the Laplacian flow on the product manifolds $M^6\times{\mathbb S}^1$. The application of our results to explicit cases allows us to obtain new examples of expanding Laplacian solitons.
description: 27 pages. To appear in Annali della Scuola Normale Superiore di Pisa, Classe di Scienze
title: ADCO, Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Cart. 189 (11 H 74), 316 folios, f. 0065r
Creators: name: de la Côte d'Or, Archives départementales
name: Archives Départementales De La Côte-D'Or
name: Petot, Frédérique
name: Projet CBMA
name: CG21/F.PETOT/2012
Publisher: name: NAKALA - https://nakala.fr (Huma-Num - CNRS)
publisherIdentifier: https://ror.org/04ces3204
publisherIdentifierScheme: ROR
Year: 2020
Subjects: subject: Corpus Burgundiae Medii Aevi
subject: Chartes de la Bourgogne du Moyen Âge
subject: LaMOP
subject: Laboratoire de Médiévistique Occidentale de Paris
subject: cartulaire

description: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Archives départementales de la Côte-d'Or, Cart. 189 (11 H 74), 316 folios, f. 0065r, Numérisation en mode image.
description: Relation: http://www.cbma-project.eu/
description: Bibliographic citation: Cartulaire général de Cîteaux, dit de Jean de Cirey, (XVe siècle), tome V, Archives départementales de la Côte-d'Or, Cart. 189 (11 H 74), 316 folios, f. 0065r, in Projet CBMA - Corpus Burgundiae Medii Aevi [Ressource en ligne], https:// manuscrits.cbma-project.eu/
description: Provenance: https://www.geonames.org/3024876
description: Provenance: http://www.idref.fr/030974844/id
description: Provenance: https://catalogue.bnf.fr/ark:/12148/cb12228351v
description: Provenance: abbaye de Cîteaux
description: Provenance: http://www.wikidata.org/entity/Q843261
On-sky validation of image-based adaptive optics wavefront sensor referencing
Creators: name: Skaf, Nour
name: Guyon, Olivier
name: Gendron, Eric
name: Ahn, Kyohoon
name: Bertrou-Cantou, Arielle
name: Boccaletti, Anthony
name: Cranney, Jesse
name: Currie, Thayne
name: Deo, Vincent
name: Edwards, Billy
name: Ferreira, Florian
name: Gratadour, Damien
name: Lozi, Julien
name: Norris, Barnaby
name: Sevin, Arnaud
name: Vidal, Fabrice
name: Vievard, Sebastien
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: Differentiating between an exoplanet signal and residual speckle noise is a key challenge in high-contrast imaging. Speckles are due to a combination of fast, slow and static wavefront aberrations introduced by atmospheric turbulence and instrument optics. While wavefront control techniques developed over the last decade have shown promise in minimizing fast atmospheric residuals, slow and static aberrations such as non-common path aberrations (NCPAs) remain a key limiting factor for exoplanet detection. NCPA are not seen by the wavefront sensor (WFS) of the adaptive optics (AO) loop, hence the difficulty in correcting them. We propose to improve the identification and rejection of those aberrations. The algorithm DrWHO, performs frequent compensation of static and quasi-static aberrations to boost image contrast. By changing the WFS reference at every iteration of the algorithm, DrWHO changes the AO point of convergence to lead it towards a compensation of the static and slow aberrations. References are calculated using an iterative lucky-imaging approach, where each iteration updates the WFS reference, ultimately favoring high-quality focal plane images. We validate this concept through numerical simulations and on-sky testing on the SCExAO instrument at the 8.2-m Subaru telescope. Simulations show a rapid convergence towards the correction of 82% of the NCPAs. On-sky tests are performed over a 10-minute run in the visible (750 nm). We introduce a flux concentration (FC) metric to quantify the point spread function (PSF) quality and measure a 15.7% improvement. The DrWHO algorithm is a robust focal-plane wavefront sensing calibration method that has been successfully demonstrated on sky. It does not rely on a model nor requires wavefront sensor calibration or linearity. It is compatible with different wavefront control methods, and can be further optimized for speed and efficiency.
description: Accepted in A&A. 12 pages, 15 figures. Abridged abstract
Testing a Galactic Lensing Hypothesis with the Prompt Emission of GRB 221009A
Creators: name: Bloom, Joshua S.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences

description: Even at modest amplification, the optical depth to gravitational lensing through the Galaxy is $<10^{-5}$. However, the large apparent isotropic-equivalent energy of GRB 221009A coupled with a path through low Galactic latitude suggests that the conditional probability that this particular GRB was lensed is greater than the very low a priori expectation. With the extreme brightness of the prompt emission, this Galactic lensing hypothesis can be constrained by autocorrelation analysis of Fermi photons on 0.1-1000 ms timescales. In relating lensing mass, magnification, and autocorrelation timescale, I show that a lensed-induced autocorrelation signature by stellar lenses falls below the minimal variability timescale (MVT) expected from a black hole central engine. However, lensing by Galactic dark matter MACHOs ($M_l > 10-1000\,M_\odot$) could be confirmed with this approach. Regardless, at a peak $γ$-ray photon rate of $>30$ ms$^{-1}$, GRB 221009A represents a prime opportunity to measure the smallest MVTs of GRBs.
description: 4 pages, 1 figure. Published October 2022 in Research Notes of the AAS, Volume 6, Number 10
Ideal structure and pure infiniteness of ample groupoid $C^*$-algebras
Creators: name: Bönicke, Christian
name: Li, Kang
Publisher: name: arXiv
Year: 2017
Subjects: subject: Operator Algebras (math.OA)
subject: FOS: Mathematics

description: In this paper, we study the ideal structure of reduced $C^*$-algebras $C^*_r(G)$ associated to étale groupoids $G$. In particular, we characterize when there is a one-to-one correspondence between the closed, two-sided ideals in $C_r^*(G)$ and the open invariant subsets of the unit space $G^{(0)}$ of $G$. As a consequence, we show that if $G$ is an inner exact, essentially principal, ample groupoid, then $C_r^*(G)$ is (strongly) purely infinite if and only if every non-zero projection in $C_0(G^{(0)})$ is properly infinite in $C_r^*(G)$. We also establish a sufficient condition on the ample groupoid $G$ that ensures pure infiniteness of $C_r^*(G)$ in terms of paradoxicality of compact open subsets of the unit space $G^{(0)}$. Finally, we introduce the type semigroup for ample groupoids and also obtain a dichotomy result: Let $G$ be an ample groupoid with compact unit space which is minimal and topologically principal. If the type semigroup is almost unperforated, then $C_r^*(G)$ is a simple $C^*$-algebra which is either stably finite or strongly purely infinite.
description: 25 pages To appear in Ergodic Theory and Dynamical Systems
THE EFFECTIVENESS OF BIOSAFETY STANDARDS ON THE CONSUMPTION OF GENETICALLY MODIFIED ORGANISMS
Creators: name: VIVIAN FRADE GUEDES
Publisher: name: figshare
Year: 2018
Subjects: subject: Law
subject: FOS: Law

description: O objetivo geral do trabalho é analisar se a legislação brasileira cumpre seu papel de proteger a saúde da população ao impedir a produção de alimentos perigosos ou com potencial risco. A partir disso, configuram-se como objetivos específicos: a) analisar as instruções normativas da Comissão Técnica Nacional de Biossegurança (CNTBio); b) constatar as diferentes posições da Europa e dos Estados Unidos (EUA) sobre os organismos geneticamente modificados (OGMs) e como essas posições influenciam o Brasil; c) examinar, entre outras, a lei 11.105 e seu cumprimento; d) verificar as medidas de segurança previstas pelo Protocolo de Cartagena, e) ponderar sobre o rótulo dos transgênicos no Brasil e a PL 4148/08; f) examinar os produtos transgênicos no Brasil e suas vantagens econômicas.
Thermal melting of discrete time crystals: a dynamical phase transition induced by thermal fluctuations
Creators: name: Yue, Mingxi
name: Yang, Xiaoqin
name: Cai, Zi
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: The stability of a discrete time crystal against thermal fluctuations has been studied numerically by solving a stochastic Landau-Lifshitz-Gilbert equation of a periodically-driven classical system composed of interacting spins, each of which couples to a thermal bath. It is shown that in the thermodynamic limit, even though the long-range temporary crystalline order is stable at low temperature, it is melting above a critical temperature, at which the system experiences a non-equilibrium phase transition. The critical behaviors of the continuous phase transition have been systematically investigated, and it is shown that despite the genuine non-equilibrium feature of such a periodically driven system, its critical properties fall into the 3D Ising universality class with a dynamical exponent ($z=2$) identical to that in the critical dynamics of kinetic Ising model without driving.
Breakdown of light transport models in photonic scattering slabs with strong absorption and anisotropy
Creators: name: Akdemir, Ozan
name: Lagendijk, Ad
name: Vos, Willem L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: The radiative transfer equation (RTE) models the transport of light inside photonic scattering samples such as paint, foam and tissue. Analytic approximations to solve the RTE fail for samples with strong absorption and dominant anisotropic scattering and predict unphysical negative energy densities and the diffuse flux in the wrong direction. Here we fully characterize the unphysical regions of three popular approximations to the RTE for a slab, namely the $P_1$ approximation (or diffusion approximation), the $P_3$ approximation, and a popular modification to $P_3$ that corrects the forward scattering in the approximation. We find that the delta function correction to $P_3$ eliminates the unphysical range in the forward scattering. In addition, we compare the predictions of these analytical methods to exact Monte Carlo simulations for the physical and unphysical regions. We present maps of relative errors for the albedo and the anisotropy of the scatterers for a realistic index contrast typical of a polymer slab in air and optical thickness. The relative error maps provide a guideline for the accuracy of the analytical methods to interpret experiments on light transport in photonic scattering slabs. Our results show that the $P_1$ approximation is significantly inaccurate to extract transport parameters unless the sample scatters purely isotropic and elastic. The $P_3$ approximation exceeds $P_1$ in terms of accuracy in its physical range for moderate absorption, and the $P_3$ with the delta function correction is the most accurate approximation considered here for the forward direction.
THE LEGAL STATUS OF THE WORKER LINKED TO UBER AND THE ACT OF JUSTICE OF WORK
Creators: name: THIAGO DINIZ VIAL
Publisher: name: figshare
Year: 2018
Subjects: subject: Law
subject: FOS: Law

description: O objetivo geral do trabalho é analisar os tipos de relações existentes entre a empresa Uber e o motorista para que sejam constatadas as condições ideais e justas deste relacionamento. São objetivos específicos: a) analisar a relação custo benefício para o consumidor comparando o taxi e a Uber; b) verificar a opinião dos motoristas do aplicativo a respeito do tema; c) avaliar os resultados econômicos da Uber e de seus motoristas; d) levantar a renda trazida pela empresa ao município; e) estimar o número de motoristas da Uber em Belo Horizonte; f) verificar os resultados de julgamentos sobre o tema; g) analisar o posicionamento constitucional sobre o tema; h) investigar se há subordinação ou não no serviço;
Comment on `Oxygen vacancy-induced magnetic moment in edge-sharing CuO$_{2}$ chains of Li$_{2}$CuO$_{2}$'
Creators: name: Kuzian, R. O.
name: Klingeler, R.
name: Lorenz, W. E. A.
name: Wizent, N.
name: Nishimoto, S.
name: Nitzsche, U.
name: Rosner, H.
name: Milosavljevic, D.
name: Hozoi, L.
name: Yadav, R.
name: Richter, J.
name: Hauser, A.
name: Geck, J.
name: Hayn, R.
name: Yushankhai, V.
name: Siurakshina, L.
name: Monney, C.
name: Schmitt, T.
name: Thar, J.
name: Roth, G.
name: Ito, T.
name: Yamaguchi, H.
name: Matsuda, M.
name: Johnston, S.
name: Malek, J.
name: Drechsler, S-L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Strongly Correlated Electrons (cond-mat.str-el)
subject: FOS: Physical sciences

description: In a recent work devoted to the magnetism of Li$_{2}$CuO$_{2}$, Shu et al. [New J. Phys. 19 (2017) 023026] have proposed a "simplified" unfrustrated microscopic model that differs considerably from the models refined through decades of prior work. We show that the proposed model is at odds with known experimental data, including the reported magnetic susceptibility $χ(T)$ data up to 550~K. Using an 8$^{\rm th}$ order high-temperature expansion for $χ(T)$, we show that the experimental data for Li$_{2}$CuO$_{2}$ are consistent with the prior model derived from inelastic neutron scattering (INS) studies. We also establish the $T$-range of validity for a Curie-Weiss law for the real frustrated magnetic system. We argue that the knowledge of the long-range ordered magnetic structure for $T
description: 12 pages, 1 figure. Two authors and one reference added as well as slightly changed wording and style (two footnotes added). Short note on the Authors's Reply and Corrigendum is added as well
A Novel Mutual Insurance Model for Hedging Against Cyber Risks in Power Systems Deploying Smart Technologies
Creators: name: Lau, Pikkin
name: Wang, Lingfeng
name: Wei, Wei
name: Liu, Zhaoxi
name: Ten, Chee-Wooi
Publisher: name: arXiv
Year: 2024
Subjects: subject: Computer Science and Game Theory (cs.GT)
subject: Systems and Control (eess.SY)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: In this paper, a novel cyber-insurance model design is proposed based on system risk evaluation with smart technology applications. The cyber insurance policy for power systems is tailored via cyber risk modeling, reliability impact analysis, and insurance premium calculation. A stochastic Epidemic Network Model is developed to evaluate the cyber risk by propagating cyberattacks among graphical vulnerabilities. Smart technologies deployed in risk modeling include smart monitoring and job thread assignment. Smart monitoring boosts the substation availability against cyberattacks with preventive and corrective measures. The job thread assignment solution reduces the execution failures by distributing the control and monitoring tasks to multiple threads. Reliability assessment is deployed to estimate load losses convertible to monetary losses. These monetary losses would be shared through a mutual insurance plan. To ensure a fair distribution of indemnity, a new Shapley mutual insurance principle is devised. Effectiveness of the proposed Shapley mutual insurance design is validated via case studies. The Shapley premium is compared with existent premium designs. It is shown that the Shapley premium has high indemnity levels closer to those of Tail Conditional Expectation premium. Meanwhile, the Shapley premium is nearly as affordable as the coalitional premium and keeps a relatively low insolvency probability.
description: Power system reliability, cyber-insurance, power system security, cyber-physical systems, cyber risk modeling, actuarial design, tail risk
Impulsive gravitational waves in general massive 3D gravity
Creators: name: Baykal, Ahmet
name: Dereli, Tekin
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Impulsive, non-diverging, Petrov-Segre type N gravitational wave solutions to a general massive three-dimensional gravity in the de Sitter, anti-de Sitter and flat Minkowski backgrounds are constructed in a unified manner by using the exterior algebra of differential forms.
description: Published version
Studying and improving the performance of ETSI ITS contention-based forwarding (CBF) in urban and highway scenarios: S-FoT+
Creators: name: Amador, Oscar
name: Soto, Ignacio
name: Calderon, Maria
name: Urueña, Manuel
Publisher: name: arXiv
Year: 2024
Subjects: subject: Networking and Internet Architecture (cs.NI)
subject: FOS: Computer and information sciences

description: This paper evaluates the performance of ETSI ITS Contention-Based Forwarding (CBF) and ETSI Simple GeoBroadcast forwarding while disseminating warning messages over a Geographical Area in highway and urban scenarios. Our experimental evaluation considers the complete ETSI ITS architecture including the Decentralized Congestion Control (DCC) mechanism. We propose an enhanced CBF mechanism, named S-FOT+, which combines several improvements to the ETSI CBF algorithm. S-FoT+ has a similar or better performance than the ETSI forwarding algorithms regarding both reliability and end-to-end delay while requiring much fewer transmissions. The improvements are equally effective and efficient in both urban and highway scenarios with large Destination Areas. Finally, we evaluate the trade-offs that stem from using multi-hop broadcast mechanisms in urban settings with smaller Destination Areas when compared to single-hop broadcast. Results show that multi-hop mechanisms significantly improve coverage at the cost of an increased number of transmissions.
First numerical evidence of Janssen-Oerding's prediction in a three-dimensional spin model far from equilibrium
Creators: name: da Silva, Roberto
Publisher: name: arXiv
Year: 2021
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: Jansen and Oerding [H. K. Janssen, K. Oerding, J. Phys. A: Math. Gen. 27, 715 (1994)] predicted an interesting anomalous tricritical dynamic behavior in three-dimensional models via renormalization group theory. However, we verify a lack of literature about the computational verification of this universal behavior. Here, we used some tricks to capture the log corrections and the parameters predicted by these authors using the three-dimensional Blume-Capel model. In addition, we also performed a more detailed study of the dynamic localization of the phase diagram via power laws optimization. We quantify the crossover phenomena by computing the critical exponents near the tricritical point.
description: 6 pages, 6 figures
Einstein nilpotent Lie groups
Creators: name: Conti, Diego
name: Rossi, Federico A.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 53C50 (Primary), 53C25, 53D20, 22E25 (Secondary)

description: We study the Ricci tensor of left-invariant pseudoriemannian metrics on Lie groups. For an appropriate class of Lie groups that contains nilpotent Lie groups, we introduce a variety with a natural $\mathrm{GL}(n,\mathbb{R})$ action, whose orbits parametrize Lie groups with a left-invariant metric; we show that the Ricci operator can be identified with the moment map relative to a natural symplectic structure. From this description we deduce that the Ricci operator is the derivative of the scalar curvature $s$ under gauge transformations of the metric, and show that Lie algebra derivations with nonzero trace obstruct the existence of Einstein metrics with $s\neq0$. Using the notion of nice Lie algebra, we give the first example of a left-invariant Einstein metric with $s\neq0$ on a nilpotent Lie group. We show that nilpotent Lie groups of dimension $\leq 6$ do not admit such a metric, and a similar result holds in dimension $7$ with the extra assumption that the Lie algebra is nice.
description: 24 pages; v2, improved criterion for nonexistence added (Theorem 4.1), proofs simplified and contents reorganized accordingly, two references added; v3, corrected a constant in Theorem 3.8 and Corollary 3.10, minor correction in the proofs, added examples of Einstein metrics in any indefinite signature, presentation improved, three references added. To appear in J. Pure Appl. Algebra