cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
On anti-invariant semi-Riemannian submersions from Lorentzian (para)Sasakian manifolds
Creators: name: Faghfouri, Morteza
name: Mashmouli, Sahar
Publisher: name: arXiv
Year: 2017
Subjects: subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: In this paper we study a semi-Riemannian submersion from Lorentzian (para)almost contact manifolds and find necessary and sufficient conditions for the characteristic vector field to be vertical or horizontal. We also obtain decomposition theorems for an anti-invariant semi-Riemannian submersion from Lorentzian (para)Sasakian manifolds onto a Lorentzian manifold.
description: arXiv admin note: text overlap with arXiv:1302.4906, arXiv:1302.5108, arXiv:1504.04180 by other authors
Engineering Floquet moiré patterns for scalable photocurrents
Creators: name: Calvo, Hernan L.
name: Torres, Luis E. F. Foa
name: Berdakin, Matias
Publisher: name: arXiv
Year: 2024
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: While intense laser irradiation and moiré engineering have independently proven powerful for tuning material properties on demand in condensed matter physics, their combination remains unexplored. Here we exploit tilted laser illumination to create spatially modulated light-matter interactions, leading to two striking phenomena in graphene. First, using two lasers tilted along the same axis, we create a quasi-1D supercell hosting a network of Floquet topological states that generate controllable and scalable photocurrents spanning the entire irradiated region. Second, by tilting lasers along orthogonal axes, we establish a 2D polarization moiré pattern giving rise to closed orbital propagation of Floquet states, reminiscent of bulk Landau states. These features, imprinted in the bulk of the irradiated region and controlled through laser wavelength and tilt angles, establish a new way for engineering quantum states through spatially modulated light-matter coupling.
description: 14 pages, 10 figures
On the homotopy theory of equivariant colored operads
Creators: name: Bonventre, Peter
name: Pereira, Luis Alexandre
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Topology (math.AT)
subject: FOS: Mathematics

description: We build model structures on the category of equivariant simplicial operads with weak equivalences determined by families of subgroups, in the context of operads with a varying set of colors (and building on the fixed color model structures in the prequel). In particular, by specifying to the family of graph subgroups (or, more generally, one of the indexing systems of Blumberg-Hill), we obtain model structures on the category of equivariant simplicial operads whose weak equivalences are determined by norm map data.
description: v2: Improved exposition, and other minor edits in response to referee suggestions. arXiv admin note: substantial text overlap with arXiv:1908.05440
An Equivariant Tamagawa Number Formula for Drinfeld Modules and Applications
Creators: name: Ferrara, Joseph
name: Green, Nathan
name: Higgins, Zach
name: Popescu, Cristian D.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11G09, 11M38, 11F80

description: We fix data $(K/F, E)$ consisting of a Galois extension $K/F$ of characteristic $p$ global fields with arbitrary abelian Galois group $G$ and a Drinfeld module $E$ defined over a certain Dedekind subring of $F$. For this data, we define a $G$-equivariant $L$-function $Θ_{K/F}^E$ and prove an equivariant Tamagawa number formula for certain Euler-completed versions of its special value $Θ_{K/F}^E(0)$. This generalizes Taelman's class number formula for the value $ζ_F^E(0)$ of the Goss zeta function $ζ_F^E$ associated to the pair $(F, E)$. Taelman's result is obtained from our result by setting $K=F$. As a consequence, we prove a perfect Drinfeld module analogue of the classical (number field) refined Brumer--Stark conjecture, relating a certain $G$-Fitting ideal of Taelman's class group $H(E/K)$ to the special value $Θ_{K/F}^E(0)$ in question.
Baikov-Lee Representations Of Cut Feynman Integrals
Creators: name: Harley, Mark
name: Moriello, Francesco
name: Schabinger, Robert M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: We develop a general framework for the evaluation of $d$-dimensional cut Feynman integrals based on the Baikov-Lee representation of purely-virtual Feynman integrals. We implement the generalized Cutkosky cutting rule using Cauchy's residue theorem and identify a set of constraints which determine the integration domain. The method applies equally well to Feynman integrals with a unitarity cut in a single kinematic channel and to maximally-cut Feynman integrals. Our cut Baikov-Lee representation reproduces the expected relation between cuts and discontinuities in a given kinematic channel and furthermore makes the dependence on the kinematic variables manifest from the beginning. By combining the Baikov-Lee representation of maximally-cut Feynman integrals and the properties of periods of algebraic curves, we are able to obtain complete solution sets for the homogeneous differential equations satisfied by Feynman integrals which go beyond multiple polylogarithms. We apply our formalism to the direct evaluation of a number of interesting cut Feynman integrals.
description: 37 pages; v2 is the published version of this work with references added relative to v1
A ratiometric styryl bridging triphenylamine-indolinium based fluorescent dye for detection of cyanide with a large emission shift in human breast cancer cells and test strips
Creators: name: Mandal, Moumi
name: Karak, Anirban
name: Halder, Satyajit
name: Banerjee, Shilpita
name: Maiti, Anwesha
name: Jana, Kuladip
name: Mahapatra, Ajit Kumar
name: Kar, Arik
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Space Science
subject: Medicine
subject: Microbiology
subject: FOS: Biological sciences
subject: Molecular Biology
subject: Neuroscience
subject: Physiology
subject: Biotechnology
subject: 39999 Chemical Sciences not elsewhere classified
subject: FOS: Chemical sciences
subject: Cancer
subject: Plant Biology

description: A new type of styryl bridging triphenyl amine-indolium conjugated dye has been developed for the colorimetric and ratiometric detection of cyanide. The detection of cyanide is confirmed by means of the fast nucleophilic attack of cyanide by the indolium group of the probe that results a speedy sensing process for cyanide with clear color and fluorescence change of the ICT process. The ratiometric fluorescence changes illustrated a linear response in the range of 0-18 μM with a low LOD value (1.7×10-7 M-1). The as-reported sensor not only function as a colorimetric sensor for “in-the-field” measurement by virtue of a “dip-stick” approach but also interact with a human breast cancer cell (MDA-MB 231) which reveals the realistic value of this probe for tracking cyanide anions in biological systems.
Two-dimensional exciton-polariton interactions beyond the Born approximation
Creators: name: Hu, Hui
name: Deng, Hui
name: Liu, Xia-Ji
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We provide a many-body theory for the interactions of two-dimensional excitons and polaritons beyond the Born approximation. Taking into account Gaussian quantum fluctuations via the Bogoliubov theory, we find that the two-body interaction strength in two-dimensions has an inverse logarithmic dependence on the scattering length and ground state energy. This leads to a vanishing exciton interaction strength in the zero-momentum limit but a finite polariton interaction strength due to strong light-matter coupling. We also derive the exact Tan relations for exciton-polaritons and calculate Tan's contact coefficient. We show the polariton interaction strength and Tan's contact both exhibit an anomalous enhancement at red photon-exciton detuning when the scattering length is large. Our predictions may provide a qualitatively correct guide for studies of exciton and polariton nonlinearities, and suggest a route to achieving strongly nonlinear polariton gases.
description: 6 pages, 3 figures + 8 pages of Supplemental Material; many-body calculations (Bogoliubov theory) using a bosonic model Hamiltonian
Tensor-on-tensor regression
Creators: name: Lock, Eric F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Methodology (stat.ME)
subject: Machine Learning (stat.ML)
subject: FOS: Computer and information sciences

description: We propose a framework for the linear prediction of a multi-way array (i.e., a tensor) from another multi-way array of arbitrary dimension, using the contracted tensor product. This framework generalizes several existing approaches, including methods to predict a scalar outcome from a tensor, a matrix from a matrix, or a tensor from a scalar. We describe an approach that exploits the multiway structure of both the predictors and the outcomes by restricting the coefficients to have reduced CP-rank. We propose a general and efficient algorithm for penalized least-squares estimation, which allows for a ridge (L_2) penalty on the coefficients. The objective is shown to give the mode of a Bayesian posterior, which motivates a Gibbs sampling algorithm for inference. We illustrate the approach with an application to facial image data. An R package is available at https://github.com/lockEF/MultiwayRegression .
description: 33 pages, 3 figures
Calculating polaron mobility in halide perovskites
Creators: name: Frost, Jarvist Moore
Publisher: name: arXiv
Year: 2017
Subjects: subject: Materials Science (cond-mat.mtrl-sci)
subject: FOS: Physical sciences

description: Lead halide perovskite semiconductors are soft, polar, materials. The strong driving force for polaron formation (the dielectric electron-phonon coupling) is balanced by the light band effective-masses, leading to a strongly-interacting large-polaron. A first-principles prediction of mobility would help understand the fundamental mobility limits. Theories of mobility need to consider the polaron (rather than free-carrier) state due to the strong interactions. In this material we expect that at room temperature polar-optical phonon mode scattering will dominate, and so limit mobility. We calculate the temperature-dependent polaron mobility of hybrid halide perovskites by variationally solving the Feynman polaron model with the finite-temperature free-energies of Ōsaka. This model considers a simplified effective-mass band-structure interacting with a continuum dielectric of characteristic response frequency. We parametrise the model fully from electronic-structure calculations. In methylammonium lead iodide at 300 K we predict electron and hole mobilities of 133 and 94 cm^2/V/s respectively. These are in acceptable agreement with single-crystal measurements, suggesting that the intrinsic limit of the polaron charge carrier state has been reached. Repercussions for hot-electron photo-excited states are discussed. As well as mobility, the model also exposes the dynamic structure of the polaron. This can be used to interpret impedance measurements of the charge-carrier state. We provide the phonon-drag mass-renormalisation, and scattering time constants. These could be used as parameters for larger-scale device models and band-structure dependent mobility simulations.
description: 12 pages, 7 figures
Single trusted qubit is necessary and sufficient for quantum realisation of extremal no-signaling correlations
Creators: name: Ramanathan, Ravishankar
name: Banacki, Michał
name: Rodríguez, Ricard Ravell
name: Horodecki, Paweł
Publisher: name: arXiv
Year: 2020
Subjects: subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: Quantum statistics can be considered from the perspective of postquantum no-signaling theories in which either none or only a certain number of quantum systems are trusted. In these scenarios, the role of states is played by the so-called no-signaling boxes or no-signaling assemblages respectively. It has been shown so far that in the usual Bell non-locality scenario with a single measurement run, quantum statistics can never reproduce an extremal non-local point within the set of no-signaling boxes. We provide here a general no-go rule showing that the latter stays true even if arbitrary sequential measurements are allowed. On the other hand, we prove a positive result showing that already a single trusted qubit is enough for quantum theory to produce a self-testable extremal point within the corresponding set of no-signaling assemblages. This result opens up the possibility for security proofs of cryptographic protocols against general no-signaling adversaries.
description: 30 pages
Intellectual Property Protection and Growth: Evidence from Post-TRIPS Development of Manufacturing Industries
Creators: name: Du, Ruozhou
Publisher: name: University of Chicago
Year: 2022
Subjects: subject: Intellectual Property
subject: Economic Growth
subject: TRIPS
subject: R&D

description: Intellectual property protection has long been recognized as a fundamental determinant of innovation and economic growth, and weak rights in developing countries are one of the significant barriers to the takeoff of their economy. Taking countries’ reactions to the Agreement on Trade-Related Aspects of Intellectual Property Rights as an experiment, I examine this linkage by exploiting within-country variation in the growth of industries’ value-added in a context with overall increasing intellectual property protection. Specifically, I ask whether industrial sectors that are more in need of R&D developed faster in developing countries that had raised their intellectual property strength to a relatively higher level in accordance with the Agreement. I find this to be true in a sample of up to 22 industries in 38 countries during 2000-2005. I show this result is unlikely driven by the reverse causality or other confounders, and my findings are robust to alternative measures of industrial R&D intensity.
A Smoothed Particle Hydrodynamics Mini-App for Exascale
Creators: name: Cavelan, Aurélien
name: Cabezón, Rubén M.
name: Grabarczyk, Michal
name: Ciorba, Florina M.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Computational Engineering, Finance, and Science (cs.CE)
subject: FOS: Computer and information sciences

description: The Smoothed Particles Hydrodynamics (SPH) is a particle-based, meshfree, Lagrangian method used to simulate multidimensional fluids with arbitrary geometries, most commonly employed in astrophysics, cosmology, and computational fluid-dynamics (CFD). It is expected that these computationally-demanding numerical simulations will significantly benefit from the up-and-coming Exascale computing infrastructures, that will perform 10 18 FLOP/s. In this work, we review the status of a novel SPH-EXA mini-app, which is the result of an interdisciplinary co-design project between the fields of astrophysics, fluid dynamics and computer science, whose goal is to enable SPH simulations to run on Exascale systems. The SPH-EXA mini-app merges the main characteristics of three state-of-the-art parent SPH codes (namely ChaNGa, SPH-flow, SPHYNX) with state-of-the-art (parallel) programming, optimization, and parallelization methods. The proposed SPH-EXA mini-app is a C++14 lightweight and flexible header-only code with no external software dependencies. Parallelism is expressed via multiple programming models, which can be chosen at compilation time with or without accelerator support, for a hybrid process+thread+accelerator configuration. Strong and weak-scaling experiments on a production supercomputer show that the SPH-EXA mini-app can be efficiently executed with up 267 million particles and up to 65 billion particles in total on 2,048 hybrid CPU-GPU nodes.
description: For PASC 2020 conference
Direito de autor
Creators: name: Fidalgo, Vítor Palmela
Publisher: name: Propriedades Intelectuais
Year: 2019

description: A. E., I.P. contra P. E., S.A., R. E., Lda. e L. E., S.A. – Proc. n.º 284/18.8YHLSB – Acção de Processo Comum – 369840 – Conclusão – 18-06-2019 – Tribunal da Propriedade Intelectual.
description: Propriedades Intelectuais, n. 12 (2019)
A bivariant Yoneda lemma and $(\infty,2)$-categories of correspondences
Creators: name: Macpherson, Andrew W.
Publisher: name: arXiv
Year: 2020
Subjects: subject: Category Theory (math.CT)
subject: Algebraic Topology (math.AT)
subject: K-Theory and Homology (math.KT)
subject: FOS: Mathematics

description: Everyone knows that if you have a bivariant homology theory satisfying a base change formula, you get an representation of a category of correspondences. For theories in which the covariant and contravariant transfer maps are in mutual adjunction, these data are actually equivalent. In other words, a 2-category of correspondences is the universal way to attach to a given 1-category a set of right adjoints that satisfy a base change formula. Through a bivariant version of the Yoneda paradigm, I give a definition of correspondences in higher category theory and prove an extension theorem for bivariant functors. Moreover, conditioned on the existence of a 2-dimensional Grothendieck construction, I provide a proof of the aforementioned universal property. The methods, morally speaking, employ the `internal logic' of higher category theory: they make no explicit use of any particular model.
description: 62 pages. Final version. To appear in Algebraic Geom. Topol.. Keywords: bivariant homology, correspondences, spans, (infinity,2)-category, Yoneda, Beck-Chevalley, base change, straightening, Grothendieck construction, biCartesian fibration
Spatial Distribution of Element Abundances and Ionization States in Solar Energetic-Particle Events
Creators: name: Reames, Donald V.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: FOS: Physical sciences

description: We have studied the spatial and temporal distribution of abundances of chemical elements in large "gradual" solar energetic-particle (SEP) events, and especially the source plasma temperatures, derived from those abundances, using measurements from the Wind and Solar TErestrial RElations Observatory (STEREO) spacecraft, widely separated in solar longitude. A power-law relationship between abundance enhancements and mass-to-charge ratios [A/Q] of the ions can be used to determine Q-values and source plasma temperatures at remote spacecraft with instruments that were not designed for charge-state measurements. We search for possible source variations along the accelerating shock wave, finding one clear case where the accelerating shock wave appears to dispatch ions from 3.2+-0.8 MK plasma toward one spacecraft and those from 1.6+-0.2 MK plasma toward another, 116 deg away. The difference persists three days and then fades away. Three other SEP events show less-extreme variation in source temperatures at different spacecraft, in one case observed over 222 deg in longitude. This initial study shows how the power-law relation between abundance enhancements and ion A/Q-values pro-vides a new technique to determine Q and plasma temperatures in the seed population of SEP ions over a broad region of space using remote spacecraft with instruments that were not originally designed for measurements of ionization states.
description: 21 pages, 10 figures, accepted for publication in Solar Physics
A caminho de uma lei europeia sobre contratos de propriedade literária e artística?
Creators: name: Varet, Vicent
Publisher: name: Propriedades Intelectuais
Year: 2019

description: A regulamentação dos contratos de autor (e também a dos contratos celebrados com um artista-intérprete) era até agora um dos poucos aspetos do direito da propriedade literária e artística, juntamente com os direitos morais, a ter escapado ao movimento harmonizador de Bruxelas; por outro lado, o âmbito deste esboço de harmonização é singularmente vasto, uma vez que se refere não só aos contratos de autores, independentemente do sector cultural ou económico em causa, mas também aos contratos celebrados com artistas intérpretes.
description: Propriedades Intelectuais, n. 12 (2019)
Non-Uniqueness of Bubbling for Wave Maps
Creators: name: Engelstein, Max
name: Mendelson, Dana
Publisher: name: arXiv
Year: 2020
Subjects: subject: Analysis of PDEs (math.AP)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics

description: We consider wave maps from $\mathbb R^{2+1}$ to a $C^\infty$-smooth Riemannian manifold, $\mathcal N$. Such maps can exhibit energy concentration, and at points of concentration, it is known that the map (suitably rescaled and translated) converges weakly to a harmonic map, known as a bubble. We give an example of a wave map which exhibits a type of non-uniqueness of bubbling. In particular, we exhibit a continuum of different bubbles at the origin, each of which arise as the weak limit along a different sequence of times approaching the blow-up time. This is the first known example of non-uniqueness of bubbling for dispersive equations. Our construction is inspired by the work of Peter Topping [Topping 2004], who demonstrated a similar phenomena can occur in the setting of harmonic map heat flow, and our mechanism of non-uniqueness is the same 'winding' behavior exhibited in that work.
description: Published version with the journal's style file. 30 pages. 2 figures
Anisotropic thermal expansion effects in layered n-Alkyl carboxylic acid – bipyridyl cocrystals
Creators: name: Hall, Amy V.
name: Yufit, Dmitry S.
name: Zhang, Yingfeng
name: Musa, Osama M.
name: Steed, Jonathan W.
Publisher: name: Taylor & Francis
Year: 2022
Subjects: subject: Biophysics
subject: Biochemistry
subject: Molecular Biology
subject: Biotechnology
subject: Evolutionary Biology
subject: FOS: Biological sciences
subject: Developmental Biology
subject: Inorganic Chemistry
subject: FOS: Chemical sciences
subject: Hematology

description: Cocrystallisation of butanoic acid (BA), pentanoic acid (PA), and eicosanoic acid (EA) with 4,4’-azopyridine (azp) and trans-1,2-bis(4-pyridyl)ethylene (bpe) results in 2:1 lamellar cocrystals. All cocrystals display the OH···Npyridyl seven-membered ring supramolecular synthon however, each cocrystal responds differently upon heating. Positive thermal expansion (PTE) occurs along the c-axis due to π···π stacking in the isostructural BA cocrystals, while the PA cocrystals are not isostructural and display a mixture of anti and gauche conformations of the acid chains because of the length mismatch with the coformer. PA2·azp displays negative thermal expansion (NTE) of the intrasynthon C···O hydrogen bond. The two EA cocrystals both display c-axis elongation on warming due to the expansion of the distance between the alkyl chains. The expansion by more than 1 Å in EA2·azp is highly anisotropic, however, there is much less c-axis expansion in EA2·bpe.
Fair use como uso transformador: a sua evolução e o seu futuro nos EUA
Creators: name: Leaffer, Marshall
Publisher: name: Propriedades Intelectuais
Year: 2019

description: O objetivo deste artigo não é analisar a doutrina do fair use em todas as suas manifestações, mas sim focar a análise no denominado uso transformador, tal como adotada pelo Supremo Tribunal em Campbell v. Acuff-Rose Music Inc. Este aspeto da doutrina do fair use é definido como um uso que transformou o trabalho original e, ao fazê-lo, acrescentou-lhe valor ao criar novas informações, novas estéticas, novas ideias e novos entendimentos.
description: Propriedades Intelectuais, n. 12 (2019)
L-space knots have no essential Conway spheres
Creators: name: Lidman, Tye
name: Moore, Allison H.
name: Zibrowius, Claudius
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: Quantum Algebra (math.QA)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics

description: We prove that L-space knots do not have essential Conway spheres with the technology of peculiar modules, a Floer theoretic invariant for tangles.
description: 25 pages, 11 color figures created with PSTricks and TikZ. v1: Comments welcome! v2: This version fixes a mistake that previously occurred in Figure 10 and the proof of Proposition 5.1. The correction simplifies the overall argument. This is the version accepted for publication at Geometry & Topology
O pensamento por detrás do caso Cofemel: entrevista ao Dr. João Miranda, advogado, membro do Comité Editorial desta revista
Creators: name: Antunes, Diogo
Publisher: name: Propriedades Intelectuais
Year: 2019

description: Entrevista conduzida por Diogo Antunes, advogado-estagiário que faz parte da revista Propriedades Intelectuais.
description: Propriedades Intelectuais, n. 12 (2019)
Sylvester O'Halloran's influence on medicine in eighteenth-century Ireland
Creators: name: GRACE, PIERCE
Publisher: name: University of Limerick
Year: 2023
Subjects: subject: Health sciences
subject: FOS: Health sciences

description: Sylvester O’Halloran was a prominent surgeon in late eighteenth-century Limerick. He wrote extensively on medicine, history and antiquarianism. His contribution tomedicine included a series of monographs on eye disease, limb amputation and head injury. Of these many publications only his work on head injury was of clinical significance. His proposals to standardise the training and assessment of surgeons in Ireland were reflected in the procedures of the County Infirmaries Board and likely inspired the curriculum of the newly founded Royal College of Surgeons in 1784. This article reflects on O’Halloran’s medical career, suggesting that his impact on practice was modest but his proposals on surgical education contributed to the professionalisation of surgery in Ireland in the eighteenth century.
Pullback of Klingen Eisenstein series and certain critical L-values identities
Creators: name: Shukla, Alok
Publisher: name: arXiv
Year: 2020
Subjects: subject: Number Theory (math.NT)
subject: FOS: Mathematics
subject: 11F46, 11F67

description: We obtain pullback formulas for Klingen Eisenstein series with arbitrary levels, with respect to both Siegel congruence and paramodular subgroups, in degree two. Pullback results are used, along with the Fourier series expansion of Klingen Eisenstein series given by Mizumoto, to prove certain identities involving critical values of $ L$-functions attached to normalized elliptic modular forms of weight $ k $ and full level.
description: To appear in The Ramanujan Journal
Boosted Dark Matter and its implications for the features in IceCube HESE data
Creators: name: Bhattacharya, Atri
name: Gandhi, Raj
name: Gupta, Aritra
name: Mukhopadhyay, Satyanarayan
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: We study the implications of the premise that any new, relativistic, highly energetic neutral particle that interacts with quarks and gluons would create cascade-like events in the IceCube (IC) detector. Such events would be observationally indistinguishable from neutral current deep-inelastic scattering events due to neutrinos. Consequently, one reason for deviations, breaks or excesses in the expected astrophysical power-law neutrino spectrum could be the flux of such a particle. Motivated by features in the recent 1347-day IceCube high energy starting event data (HESE), we focus on particular boosted dark matter ($χ$) related realizations of this premise. Here, $χ$ is assumed to be much lighter than, and the result of, the slow decay of a massive scalar ($ϕ$) which constitutes a major fraction of the Universe's dark matter. We show that this hypothesis, coupled with a standard power-law astrophysical neutrino flux is capable of providing very good fits to the present data, along with a possible explanation of other features in the HESE sample. These features include a) the paucity of events beyond $\sim 2$ PeV b) a spectral feature resembling a dip or a spectral change in the 400 TeV--1 PeV region and c) an excess in the $50-100$ TeV region. We consider two different boosted DM scenarios, and determine the allowed mass ranges and couplings for four different types of mediators (scalar, pseudoscalar, vector and axial-vector) which could connect the standard and dark sectors. We consider constraints from gamma-ray observations and collider searches. We find that the gamma-ray observations provide the most restrictive constraints, disfavouring the $1σ$ allowed parameter space from IC fits, while still being consistent with the $3σ$ allowed region. We also test our proposal and its implications against IC's recent six-year through-going muon track data.
description: 41 pages, 17 figures; v2: Added more references, minor textual improvements, 42 pages; v3: Minor textual improvements, version Published in JCAP
Entrevista Juiz Desembargador Eurico Reis
Creators: name: Carretas, Miguel
Publisher: name: Propriedades Intelectuais
Year: 2019

description: Entrevista conduzida por Miguel Carretas, advogado, diretor da revista Propriedades Intelectuais.
description: Propriedades Intelectuais, n. 12 (2019)
Analysis of the $QQ\bar{Q}\bar{Q}$ tetraquark states with QCD sum rules
Creators: name: Wang, Zhi-Gang
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: In this article, we study the $J^{PC}=0^{++}$ and $2^{++}$ $QQ\bar{Q}\bar{Q}$ tetraquark states with the QCD sum rules, and obtain the predictions $M_{X(cc\bar{c}\bar{c},0^{++})} =5.99\pm0.08\,\rm{GeV}$, $M_{X(cc\bar{c}\bar{c},2^{++})} =6.09\pm0.08\,\rm{GeV}$, $M_{X(bb\bar{b}\bar{b},0^{++})} =18.84\pm0.09\,\rm{GeV}$ and $M_{X(bb\bar{b}\bar{b},2^{++})}=18.85\pm0.09\,\rm{GeV}$, which can be confronted to the experimental data in the future. Furthermore, we illustrate that the diquark-antidiquark type tetraquark state can be taken as a special superposition of a series of meson-meson pairs and embodies the net effects.
description: 18 pages, 17 figures
Resonant photoluminescence and dynamics of a hybrid Mn-hole spin in a positively charged magnetic quantum dot
Creators: name: Lafuente-Sampietro, A.
name: Boukari, H.
name: Besombes, L.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: We analyze, through resonant photoluminescence, the spin dynamics of an individual magnetic atom (Mn) coupled to a hole in a semiconductor quantum dot. The hybrid Mn-hole spin and the positively charged exciton in a CdTe/ZnTe quantum dot forms an ensemble of $Λ$ systems which can be addressed optically. Auto-correlation of the resonant photoluminescence and resonant optical pumping experiments are used to study the spin relaxation channels in this multilevel spin system. We identified for the hybrid Mn-hole spin an efficient relaxation channel driven by the interplay of the Mn-hole exchange interaction and the coupling to acoustic phonons. We also show that the optical $Λ$ systems are connected through inefficient spin-flips than can be enhanced under weak transverse magnetic field. The dynamics of the resonant photoluminescence in a p-doped magnetic quantum dot is well described by a complete rate equation model. Our results suggest that long lived hybrid Mn-hole spin could be obtained in quantum dot systems with large heavy-hole/light-hole splitting.
title: Менеджмент и управление персоналом в гостиничном деле
Creators: name: ELS IPR BOOKS
Publisher: name: Липецкий государственный технический университет, Профобразование
Year: 2023

description: В учебном пособии рассматривается структура управления гостиничным предприятиям, приведена система классификации гостиниц в РФ, изложены функции и состав гостиничного комплекса. При освоении материалов издания у студентов формируются знания и умения, необходимые для выполнения организационно-управленческой и сервисной деятельности в гостиничных и туристических комплексах. Подготовлено в соответствии с требованиями Федерального государственного образовательного стандарта среднего профессионального образования. Предназначено для студентов, обучающихся по специальности 43.02.14 «Гостиничное дело», изучающих дисциплину «Менеджмент и управление персоналом в гостиничном деле».
Understanding Task Design Trade-offs in Crowdsourced Paraphrase Collection
Creators: name: Jiang, Youxuan
name: Kummerfeld, Jonathan K.
name: Lasecki, Walter S.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Computation and Language (cs.CL)
subject: Human-Computer Interaction (cs.HC)
subject: FOS: Computer and information sciences
subject: I.2.7; H.5.0

description: Linguistically diverse datasets are critical for training and evaluating robust machine learning systems, but data collection is a costly process that often requires experts. Crowdsourcing the process of paraphrase generation is an effective means of expanding natural language datasets, but there has been limited analysis of the trade-offs that arise when designing tasks. In this paper, we present the first systematic study of the key factors in crowdsourcing paraphrase collection. We consider variations in instructions, incentives, data domains, and workflows. We manually analyzed paraphrases for correctness, grammaticality, and linguistic diversity. Our observations provide new insight into the trade-offs between accuracy and diversity in crowd responses that arise as a result of task design, providing guidance for future paraphrase generation procedures.
description: Published at ACL 2017
Structure of Submetries
Creators: name: Kapovitch, Vitali
name: Lytchak, Alexander
Publisher: name: arXiv
Year: 2020
Subjects: subject: Differential Geometry (math.DG)
subject: Metric Geometry (math.MG)
subject: FOS: Mathematics
subject: 53C20

description: We investigate the geometric and topological structure of equidistant decompositions of Riemannian manifolds.
Bounds on Pachner moves and systoles of cusped 3-manifolds
Creators: name: Kalelkar, Tejas
name: Raghunath, Sriram
Publisher: name: arXiv
Year: 2020
Subjects: subject: Geometric Topology (math.GT)
subject: FOS: Mathematics
subject: 57K32, 57K10, 57Q25

description: Any two geometric ideal triangulations of a cusped complete hyperbolic $3$-manifold $M$ are related by a sequence of Pachner moves through topological triangulations. We give a bound on the length of this sequence in terms of the total number of tetrahedra and a lower bound on dihedral angles. This leads to a naive but effective algorithm to check if two hyperbolic knots are equivalent, given geometric ideal triangulations of their complements. Given a geometric ideal triangulation of $M$, we also give a lower bound on the systole length of $M$ in terms of the number of tetrahedra and a lower bound on dihedral angles.
description: Exposition improved, more figures added, no change to statements of Theorems. This version is accepted for publication in the journal Algebraic & Geometric Topology
Constraints on AGN feedback from its Sunyaev-Zel'dovich imprint on the cosmic background radiation
Creators: name: Soergel, Bjoern
name: Giannantonio, Tommaso
name: Efstathiou, George
name: Puchwein, Ewald
name: Sijacki, Debora
Publisher: name: arXiv
Year: 2016
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We derive constraints on feedback by active galactic nuclei (AGN) by setting limits on their thermal Sunyaev-Zel'dovich (SZ) imprint on the cosmic microwave background (CMB). The amplitude of any SZ signature is small and degenerate with the poorly known sub-mm spectral energy distribution of the AGN host galaxy and other unresolved dusty sources along the line of sight. Here we break this degeneracy by combining microwave and sub-mm data from Planck with all-sky far-infrared maps from the AKARI satellite. We first test our measurement pipeline using the Sloan Digital Sky Survey (SDSS) redMaPPer catalogue of galaxy clusters, finding a highly significant detection ($>$$20σ$) of the SZ effect together with correlated dust emission. We then constrain the SZ signal associated with spectroscopically confirmed quasi-stellar objects (QSOs) from SDSS data release 7 (DR7) and the Baryon Oscillation Spectroscopic Survey (BOSS) DR12. We obtain a low-significance ($1.6σ$) hint of an SZ signal, pointing towards a mean thermal energy of $\simeq 5 \times 10^{60}$ erg, lower than reported in some previous studies. A comparison of our results with high-resolution hydrodynamical simulations including AGN feedback suggests QSO host masses of $M_{200c} \sim 4 \times 10^{12}~h^{-1}M_\odot$, but with a large uncertainty. Our analysis provides no conclusive evidence for an SZ signal specifically associated with AGN feedback.
description: 21 pages, 14 figures, matches version published by MNRAS
The Higher Dimensional Tropical Vertex
Creators: name: Argüz, Hülya
name: Gross, Mark
Publisher: name: arXiv
Year: 2020
Subjects: subject: Algebraic Geometry (math.AG)
subject: Mathematical Physics (math-ph)
subject: Symplectic Geometry (math.SG)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We study log Calabi-Yau varieties obtained as a blow-up of a toric variety along hypersurfaces in its toric boundary. Mirrors to such varieties are constructed by Gross-Siebert from a canonical scattering diagram built by using punctured log Gromov-Witten invariants of Abramovich-Chen-Gross-Siebert. We show that there is a piecewise linear isomorphism between the canonical scattering diagram and a scattering diagram defined algortihmically, following a higher dimensional generalisation of the Kontsevich-Soibelman construction. We deduce that the punctured log Gromov-Witten invariants of the log Calabi-Yau variety can be captured from this algorithmic construction. As a particular example, we compute these invariants for a non-toric blow-up of the three dimensional projective space along two lines. This generalizes previous results of Gross-Pandharipande-Siebert on "The Tropical Vertex" to higher dimensions.
description: 95 pages, 10 figures. To appear in Geometry & Topology, accepted version
Segundas Jornadas do Tribunal da Propriedade Intelectual 31 de maio de 2019
Creators: name: Andrade, Diana
Publisher: name: Propriedades Intelectuais
Year: 2019

description: As segundas Jornadas do Tribunal da Propriedade Intelectual realizaram-se no passado dia 31 de maio de 2019 no Auditório da Biblioteca Municipal Almeida Garrett, localizada nos Jardins do Palácio de Cristal, na cidade do Porto.
description: Propriedades Intelectuais, n. 11 (2019)
Search for $tZ'$ associated production induced by $tcZ'$ couplings at the LHC
Creators: name: Hou, Wei-Shu
name: Kohda, Masaya
name: Modak, Tanmoy
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences

description: The $P'_5$ and $R_K$ anomalies, recently observed by the LHCb collaboration in $B \to K^{(*)}$ transitions, may indicate the existence of a new $Z'$ boson, which may arise from gauged $L_μ- L_τ$ symmetry. Flavor-changing neutral current $Z'$ couplings, such as $tcZ'$, can be induced by the presence of extra vector-like quarks. In this paper we study the LHC signatures of the induced right-handed $tcZ'$ coupling that is inspired by, but not directly linked to, the $B \to K^{(*)}$ anomalies. The specific processes studied are $cg \to tZ'$ and its conjugate process each followed by $Z'\toμ^+μ^-$. By constructing an effective theory for the $tcZ'$ coupling, we first explore model-independently the discovery potential of such a $Z'$ at the 14 TeV LHC with 300 and 3000 fb$^{-1}$ integrated luminosities. We then reinterpret the model-independent results within the gauged $L_μ- L_τ$ model. In connection with $tcZ'$, the model also implies the existence of a flavor-conserving $ccZ'$ coupling, which can drive the $c \bar c \to Z' \to μ^+μ^-$ process. Our study shows that existing LHC results for dimuon resonance searches already constrain the $ccZ'$ coupling, and that the $Z'$ can be discovered in either or both of the $cg \to tZ'$ and $c \bar c \to Z'$ processes. We further discuss the sensitivity to the left-handed $tcZ'$ coupling and find that the coupling values favored by the $B \to K^{(*)}$ anomalies lie slightly below the LHC discovery reach even with 3000 fb$^{-1}$.
description: 14 pages, 18 figures, explanations added, matched with the published version
Local Projection Inference is Simpler and More Robust Than You Think
Creators: name: Olea, José Luis Montiel
name: Plagborg-Møller, Mikkel
Publisher: name: arXiv
Year: 2020
Subjects: subject: Econometrics (econ.EM)
subject: FOS: Economics and business

description: Applied macroeconomists often compute confidence intervals for impulse responses using local projections, i.e., direct linear regressions of future outcomes on current covariates. This paper proves that local projection inference robustly handles two issues that commonly arise in applications: highly persistent data and the estimation of impulse responses at long horizons. We consider local projections that control for lags of the variables in the regression. We show that lag-augmented local projections with normal critical values are asymptotically valid uniformly over (i) both stationary and non-stationary data, and also over (ii) a wide range of response horizons. Moreover, lag augmentation obviates the need to correct standard errors for serial correlation in the regression residuals. Hence, local projection inference is arguably both simpler than previously thought and more robust than standard autoregressive inference, whose validity is known to depend sensitively on the persistence of the data and on the length of the horizon.
IV Congresso de Propriedade Intelectual 25 e 26 de outubro de 2019
Creators: name: Andrade, Diana
Publisher: name: Propriedades Intelectuais
Year: 2019

description: O IV Congresso de Propriedade Intelectual organizado em parceria pela Associação Portuguesa de Direito Intelectual (APDI) e pela Edições Almedina, sob a coordenação do Prof. Doutor Dário Moura Vicente, Presidente da Direção da Associação, decorreu nos passados dias 25 e 26 de outubro de 2019, no emblemático Altis Grande Hotel, em Lisboa.
description: Propriedades Intelectuais, n. 11 (2019)
N=3-extended Supersymmetric Schwarzian and Liouville Theories
Creators: name: Aoyama, Shogo
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: N=3 super-Schwarzian and N=(3,0) super-Liouville theories are formulated by the coadjoint orbit method. We study the coadjoint orbit dependence of the respective theories, represented by a superfield b. We show that it is renormalized into the N=3 super-Schwarzian derivative when the b field takes an appropriate configuration at the initial point of the orbit. Then the renormalized actions of the respective theories are invariant under OSp(2$|$3) transformations. If the configuration gets further specified, the initial point of the orbit turns out to be stable under one other kind of OSp(2$|$3) transformations as well.
description: 25 pages,v2: published version, streamlined argument on the Kirillov-Kostant two-form by reorganizing Secs 3, 6 and Appendix B, added evaluation of the N=3 super-Schwarzian theory at the stable point in Sec. 5 and comment on the Duistermaat-Heckman formula in Sec. 7, improved Appendix C
Directional Emission from Dielectric Leaky-Wave Nanoantennas
Creators: name: Peter, Manuel
name: Hildebrandt, Andre
name: Schlickriede, Christian
name: Gharib, Kimia
name: Zentgraf, Thomas
name: Förstner, Jens
name: Linden, Stefan
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optics (physics.optics)
subject: FOS: Physical sciences

description: An important source of innovation in nanophotonics is the idea to scale down known radio wave technologies to the optical regime. One thoroughly investigated example of this approach are metallic nanoantennas which employ plasmonic resonances to couple localized emitters to selected far-field modes. While metals can be treated as perfect conductors in the microwave regime, their response becomes Drude-like at optical frequencies. Thus, plasmonic nanoantennas are inherently lossy. Moreover, their resonant nature requires precise control of the antenna geometry. A promising way to circumvent these problems is the use of broadband nanoantennas made from low-loss dielectric materials. Here, we report on highly directional emission from active dielectric leaky-wave nanoantennas made of Hafnium dioxide. Colloidal semiconductor quantum dots deposited in the nanoantenna feed gap serve as a local light source. The emission patterns of active nanoantennas with different sizes are measured by Fourier imaging. We find for all antenna sizes a highly directional emission, underlining the broadband operation of our design.
Conclusões da reunião anual de Lisboa do CET-J (Circle of European Trade Mark Judges) 26 a 28 de setembro de 2019
Creators: name: Reis, Eurico
Publisher: name: Propriedades Intelectuais
Year: 2019

description: Eurico Reis, desembargador, aborda o tema das marcas de certificação, a sua origem geográfica, os princípios aceites em matéria de bons costumes (moralidade); os elementos não distintivos / exclusões de responsabilidade; as marcas individuais e marcas de qualidade.
description: Propriedades Intelectuais, n. 11 (2019)