cometadata/datacite-rtg-text-other-reclassification-records huggingface dataset:
Backscatter Sensors Communication for 6G Low-powered NOMA-enabled IoT Networks under Imperfect SIC
Creators: name: Ahmed, Manzoor
name: Khan, Wali Ullah
name: Ihsan, Asim
name: Li, Xingwang
name: Li, Jianbo
name: Tsiftsis, Theodoros A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Signal Processing (eess.SP)
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The combination of non-orthogonal multiple access (NOMA) using power-domain with backscatter sensor communication (BSC) is expected to connect a large-scale Internet of things (IoT) devices in future sixth-generation (6G) era. In this paper, we introduce a BSC in multi-cell IoT network, where a source in each cell transmits superimposed signal to its associated IoT devices using NOMA. The backscatter sensor tag (BST) also transmit data towards IoT devices by reflecting and modulating the superimposed signal of the source. A new optimization framework is provided that simultaneously optimizes the total power of each source, power allocation coefficient of IoT devices and reflection coefficient of BST under imperfect successive interference cancellation decoding. The objective of this work is to maximize the total energy efficiency of IoT network subject to quality of services of each IoT device. The problem is first transformed using the Dinkelbach method and then decoupled into two subproblems. The Karush-Kuhn-Tucker conditions and Lagrangian dual method are employed to obtain the efficient solutions. In addition, we also present the conventional NOMA network without BSC as a benchmark framework. Simulation results unveil the advantage of our considered NOMA BSC networks over the conventional NOMA network.
description: 11 pages, 6 figures
Differential Calculus on h-Deformed Spaces
Creators: name: Herlemont, Basile
name: Ogievetsky, Oleg
Publisher: name: arXiv
Year: 2017
Subjects: subject: Rings and Algebras (math.RA)
subject: Mathematical Physics (math-ph)
subject: Quantum Algebra (math.QA)
subject: Representation Theory (math.RT)
subject: FOS: Mathematics
subject: FOS: Physical sciences

description: We construct the rings of generalized differential operators on the ${\bf h}$-deformed vector space of ${\bf gl}$-type. In contrast to the $q$-deformed vector space, where the ring of differential operators is unique up to an isomorphism, the general ring of ${\bf h}$-deformed differential operators $\operatorname{Diff}_{{\bf h},σ}(n)$ is labeled by a rational function $σ$ in $n$ variables, satisfying an over-determined system of finite-difference equations. We obtain the general solution of the system and describe some properties of the rings $\operatorname{Diff}_{{\bf h},σ}(n)$.
Fair use na União Europeia (ou os estereótipos das copyright wars)
Creators: name: Rendas, Tito
Publisher: name: Propriedades Intelectuais
Year: 2015

description: O debate em torno das vantagens e desvantagens do fair use e do catálogo fechado de excepções e limites aos direitos de autor tende a ser estereotipado e a polarizar fortemente os respectivos intervenientes. De um lado, acusa-se o fair use de criar incerteza jurídica. Do outro, aponta-se o dedo ao catálogo pelo seu carácter inflexível. O artigo põe em causa a ideia instituída de que o catálogo do artigo 5.º da Directiva Sociedade de Informação tem vindo a impedir os tribunais europeus de acolher utilizações não autorizadas de obras protegidas feitas através de novos meios tecnológicos, argumentando que o maior demérito do catálogo é a incerteza jurídica que gera – o reverso daquele que é comummente apontado como sendo o seu maior mérito.
description: Propriedades Intelectuais, n. 3 (2015)
Development of high-rate capable and ultra-low mass Resistive Plate Chamber with Diamond-Like Carbon
Creators: name: Oya, Atsushi
name: Ieki, Kei
name: Ochi, Atsuhiko
name: Onda, Rina
name: Ootani, Wataru
name: Yamamoto, Kensuke
Publisher: name: arXiv
Year: 2021
Subjects: subject: Instrumentation and Detectors (physics.ins-det)
subject: FOS: Physical sciences

description: A new type of resistive plate chamber (RPC) is under development using thin-film resistive electrodes based on diamond-like carbon (DLC). Planned to be put on the path of high-intensity low-momentum muon beam of the MEG II experiment, this detector is required to be high-rate capable and ultra-low mass. Using a prototype detector with 2 cm $\times$ 2 cm size and 0.1 % $X_0$ material budget, performance studies were conducted for MIP detection efficiency, timing resolution and high rate capability in low-momentum muon beam. In this paper, the measured performance is presented including the result with low-momentum muon beam at rate up to 1 $\mathrm{MHz/cm^2}$. Based on the result, the expected performance of the full-scale detector in the MEG~II experiment is also discussed.
description: 5 pages, 8 figures. Contribution to the International Conference on Technology and Instrumentation in Particle Physics (TIPP 2021), May 24-28 2021. Submitted to Journal of Physics: Conference Series
Tasa Google o Canon AEDE: una reforma desacertada
Creators: name: Rodríguez-Cano, Rodrigo Bercovitz
Publisher: name: Propriedades Intelectuais
Year: 2015

description: El objeto de este artículo es ofrecer un estudio crítico sobre la reforma introducida por la Ley 21/2014 en relación con la agregación de noticias en línea.
description: Propriedades Intelectuais, n. 3 (2015)
Gate control of the spin mobility through the modification of the spin-orbit interaction in two-dimensional systems
Creators: name: Luengo-Kovac, M.
name: Moraes, F. C. D.
name: Ferreira, G. J.
name: Ribeiro, A. S. L.
name: Gusev, G. M.
name: Bakarov, A. K.
name: Sih, V.
name: Hernandez, F. G. G.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
subject: FOS: Physical sciences

description: Spin drag measurements were performed in a two-dimensional electron system set close to the crossed spin helix regime and coupled by strong intersubband scattering. In a sample with uncommon combination of long spin lifetime and high charge mobility, the drift transport allows us to determine the spin-orbit field and the spin mobility anisotropies. We used a random walk model to describe the system dynamics and found excellent agreement for the Rashba and Dresselhaus couplings. The proposed two-subband system displays a large tuning lever arm for the Rashba constant with gate voltage, which provides a new path towards a spin transistor. Furthermore, the data shows large spin mobility controlled by the spin-orbit constants setting the field along the direction perpendicular to the drift velocity. This work directly reveals the resistance experienced in the transport of a spin-polarized packet as a function of the strength of anisotropic spin-orbit fields.
description: 6 pages, 4 figures
Integrability from Point Symmetries in a family of Cosmological Horndeski Lagrangians
Creators: name: Dimakis, N.
name: Giacomini, Alex
name: Paliathanasis, Andronikos
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Theory (hep-th)
subject: Mathematical Physics (math-ph)
subject: FOS: Physical sciences

description: For a family of Horndeski theories, formulated in terms of a generalized Galileon model, we study the integrability of the field equations in a Friedmann-Lema\^ıtre-Robertson-Walker spacetime. We are interested in point transformations which leave invariant the field equations. Noether's theorem is applied to determine the conservation laws for a family of models that belong to the same general class. The cosmological scenarios with or without an extra perfect fluid with constant equation of state parameter are the two important cases of our study. \ The De Sitter universe and ideal gas solutions are derived by using the invariant functions of the symmetry generators as a demonstration of our result. Furthermore, we discuss the connection of the different models under conformal transformations while we show that when the Horndeski theory reduces to a canonical field the same holds for the conformal equivalent theory. Finally we discuss how singular solutions provides nonsingular universes in a different frame and vice versa.
description: 13 pages; new material and discussion improved; version accepted for publication by EPJC
Pacote de direito de autor de 21 de agosto de 2014
Creators: name: Carretas, Miguel Lourenço
name: Rodrigues, Isabel Sarsfield
name: Barreiros, Gonçalo Gil
name: Rocha, Manuel Lopes
Publisher: name: Propriedades Intelectuais
Year: 2014

description: Proposta de lei que regula as entidades de gestão colectiva do direito de autor e dos direitos conexos; proposta de lei sobre a cópia privada; proposta de lei que transpõe a directiva da União Europeia relativa a determinadas utilizações permitidas de obras órfãs; e Plano Estratégico de Combate à Violação de Direito de Autor e de Direitos Conexos.
description: Propriedades Intelectuais, n. 2 (2014)
Carta de Angola: lei dos direitos de autor e conexos
Creators: name: Carvalho, Luís Filipe
name: Cardoso, Carmina
name: De Bastos, Fernando Faria
Publisher: name: Propriedades Intelectuais
Year: 2014

description: Tendo Angola uma economia próspera e estando a sociedade angolana culturalmente mais desenvolvida, como o revela a modernização do DAC, existe uma crescente sensibilidade para a protecção dos direitos de propriedade industrial e pressão para mudar o presente estado de coisas.
description: Propriedades Intelectuais, n. 2 (2014)
ArtPop: A Stellar Population and Image Simulation Python Package
Creators: name: Greco, Johnny P.
name: Danieli, Shany
Publisher: name: arXiv
Year: 2021
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: Instrumentation and Methods for Astrophysics (astro-ph.IM)
subject: FOS: Physical sciences

description: We present Artificial Stellar Populations (ArtPop), an open-source Python package for synthesizing stellar populations and generating artificial images of fully populated stellar systems. The code is designed to be intuitive to use and as modular as possible, making it possible to use each of its functionalities independently or together. ArtPop has a wide range of scientific and pedagogical use cases, including the measurement of detection efficiencies in current and future imaging surveys, the calculation of integrated stellar population parameters, quantitative comparisons of isochrone models, and the development and validation of astronomical image processing algorithms. In this paper, we give an overview of the ArtPop package, provide simple coding examples to demonstrate its implementation, and present results from some potential applications of the code. We provide links to the source code that created each example and figure throughout the paper. ArtPop is under active development, and we welcome bug reports, feature requests, and code contributions from the community.
description: 14 pages, 8 figures, submitted to ApJ, comments welcome!
Carta de Macau: o estranho caso das indicações geográficas em Macau
Creators: name: Cabral, Gonçalo
Publisher: name: Propriedades Intelectuais
Year: 2014

description: Ao longo dos anos 90, e em especial na segunda metade dessa década, o sistema jurídico de Macau foi objecto de uma reforma generalizada com o objectivo de preparar o território para a transferência da administração da República Portuguesa para a República Popular da China. A qualidade dos diplomas legais resultantes desse esforço, e que maioritariamente se mantêm em vigor, foi, como é natural, muito variável. A propriedade industrial não teve sorte.
description: Propriedades Intelectuais, n. 2 (2014)
Stochastic L-BFGS: Improved Convergence Rates and Practical Acceleration Strategies
Creators: name: Zhao, Renbo
name: Haskell, William B.
name: Tan, Vincent Y. F.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Optimization and Control (math.OC)
subject: Information Theory (cs.IT)
subject: Machine Learning (stat.ML)
subject: FOS: Mathematics
subject: FOS: Computer and information sciences

description: We revisit the stochastic limited-memory BFGS (L-BFGS) algorithm. By proposing a new framework for the convergence analysis, we prove improved convergence rates and computational complexities of the stochastic L-BFGS algorithms compared to previous works. In addition, we propose several practical acceleration strategies to speed up the empirical performance of such algorithms. We also provide theoretical analyses for most of the strategies. Experiments on large-scale logistic and ridge regression problems demonstrate that our proposed strategies yield significant improvements vis-à-vis competing state-of-the-art algorithms.
Carta de Moçambique: Direito de propriedade sobre uma denominação de origem ou indicação geográfica em Moçambique. Aspectos principais do regime jurídico
Creators: name: Abdala, Amina
Publisher: name: Propriedades Intelectuais
Year: 2014

description: Regras aplicáveis à aquisição do direito de propriedade sobre uma denominação de origem ou uma indicação geográfica. A denominação de Origem (DO) consiste no nome de uma região, de um local determinado ou, em casos excepcionais, de um país que serve para designar ou identificar um produto originário dessa região, desse local determinado ou desse país e cujas qualidades ou características se devem, essencial ou exclusivamente, a um meio geográfico específico, incluindo os factores naturais e humanos, e cuja produção, transformação e elaboração ocorrem na área geográfica delimitada. Por Indicação Geográfica (IG) entende-se o nome de uma região, de um local determinado ou, em casos excepcionais, de um país que serve para designar ou identificar um produto originário dessa região, desse local determinado ou desse país e, cuja reputação, determinada qualidade ou outras características podem ser atribuídas a essa origem geográfica, e cuja produção e/ou transformação e/ou elaboração ocorrem na área geográfica delimitada.
description: Propriedades Intelectuais, n. 2 (2014)
The pinching method for Galactic cosmic ray positrons: implications in the light of precision measurements
Creators: name: Boudaud, M.
name: Bueno, E. F.
name: Caroff, S.
name: Genolini, Y.
name: Poulin, V.
name: Poireau, V.
name: Putze, A.
name: Rosier, S.
name: Salati, P.
name: Vecchi, M.
Publisher: name: arXiv
Year: 2016
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: FOS: Physical sciences

description: Two years ago, the AMS collaboration released the most precise measurement of the cosmic ray positron flux. It confirms that pure secondary predictions fall below the data above 10 GeV, suggesting the presence of a primary component, e.g. annihilations of WIMPs dark matter. Most analyses have focused on the high-energy part of the spectrum, disregarding the GeV energy region where cosmic ray transport is harder to model and solar modulation comes into play. Given the high quality of AMS measurements, it is timely to re-examine the positron anomaly over the entire energy range, taking into account transport processes so far neglected, e.g. convection or diffusive re-acceleration. We devise a new semi-analytical method to take into account transport processes so far neglected, but important below a few GeV. It is based on the pinching of inverse Compton and synchrotron energy losses inside the Galactic disc. It allows to carry out extensive scans over the cosmic ray propagation parameters, which we strongly constrain by requiring that the secondary component does not overshoot the AMS measurements. Only models with large diffusion coefficients survive this test. The positron flux is a powerful and independent probe of cosmic ray propagation, complementary to the boron-to-carbon ratio. We then scan over WIMP mass to fit the annihilation cross section and branching ratios, exploring both direct annihilations into standard model particles or through light mediators. In the former case, the best fit yields a $p$-value of 0.4% for a mass of 264 GeV, a value that does not allow to reproduce the highest energy data points. Worse quality fits are found in the latter case. The interpretation of the positron excess in terms of single DM species annihilations is strongly disfavored. This conclusion is based solely on the positron data, and no other observation needs to be invoked.
description: v2: small comments and references added, matches journal version
Direito da propriedade industrial
Creators: name: Mendes, Evaristo
name: D'Oliveira, Carolina Leão
name: Costa, Inês Almeida
Publisher: name: Propriedades Intelectuais
Year: 2014

description: Neste acórdão do Tribunal Geral da União Europeia (6.ª Câmara) sobre o pedido de marca comunitária figurativa FOREVER, o Tribunal considerou haver um risco de confusão com a marca nacional figurativa 4 ever por causa da sua semelhança. O Tribunal considerou, também, provada uma utilização séria da marca anterior, ainda que tivesse sido uma utilização limitada. Finalmente, aceitou que nos dias que correm, com a utilização generalizada de SMS ou da Internet, o emprego do número 4, como referência ao termo inglês “for”, pode ser considerado comum.
description: Propriedades Intelectuais, n. 2 (2014)
Nature of hard X-ray (3-24 keV) detected luminous infrared galaxies in the COSMOS field
Creators: name: Matsuoka, Kenta
name: Ueda, Yoshihiro
Publisher: name: arXiv
Year: 2017
Subjects: subject: Astrophysics of Galaxies (astro-ph.GA)
subject: FOS: Physical sciences

description: We investigate the nature of far-infrared (70 um) and hard X-ray (3-24 keV) selected galaxies in the COSMOS field detected with both Spitzer and Nuclear Spectroscopic Telescope Array (NuSTAR). By matching the Spitzer-COSMOS catalog against the NuSTAR-COSMOS catalog, we obtain a sample consisting of a hyperluminous infrared galaxy with log(L_IR/L_sun) > 13, 12 ultraluminous infrared galaxies with 12 < log(L_IR/L_sun) < 13, and 10 luminous infrared galaxies with 11 < log(L_IR/L_sun) < 12, i.e., 23 Hy/U/LIRGs in total. Using their X-ray hardness ratios, we find that 12 sources are obscured active galactic nuclei (AGNs) with absorption column densities of N_H > 10^22 cm^-2, including several Compton-thick (N_H ~ 10^24 cm^-2) AGN candidates. On the basis of the infrared (60 um) and intrinsic X-ray luminosities, we examine the relation between star-formation (SF) and AGN luminosities of the 23 Hy/U/LIRGs. We find that the correlation is similar to that of optically-selected AGNs reported by Netzer (2009), whereas local, far-infrared selected U/LIRGs show higher SF-to-AGN luminosity ratios than the average of our sample. This result suggests that our Hy/U/LIRGs detected both with Spitzer and NuSTAR are likely situated in a transition epoch between AGN-rising and cold-gas diminishing phases in SF-AGN evolutional sequences. The nature of a Compton-thick AGN candidate newly detected above 8 keV with NuSTAR (ID 245 in Civano et al. 2015) is briefly discussed.
description: 7 pages, 4 figures, accepted for publication in ApJ. Erratum (incl. 3 figures) added in Appendix, conclusions unchanged
Direito de autor
Creators: name: Lucas, André
name: Bruguière, Jean-Michel
name: Rosa, Vitor Castro
Publisher: name: Propriedades Intelectuais
Year: 2014

description: O autor comenta uma decisão do Tribunal de Propriedade Intelectual de março deste ano de 2014. Trata-se um caso de streaming ilegal no que respeita a transmissões televisivas de eventos desportivos. O tribunal ordenou às empresas que em Portugal oferecem serviços de acesso à Internet, ou de motor de busca, que limitem o acesso a tais sítios web, a partir de Portugal. Depois de uma referência à jurisprudência principal do TJUE neste tópico, bem como a outras decisões internacionais sobre situações semelhantes, o autor destaca a importância da medida tomada pelo tribunal em defesa dos titulares de direitos. No entanto, o autor assume o seu ceticismo quanto à eficácia destas medidas, evocando a facilidade com que os conteúdos podem mudar de sítio web, de nome ou de localização num servidor, sem esquecer a diversidade de jurisdições por onde passam tais conteúdos ilegais, ou seja, a dificuldade dos juízes quanto à ubiquidade da Internet. Finalmente, o autor evoca outras decisões coevas tomadas por jurisdições estrangeiras, bem como algumas soluções ensaiadas para contornar aquelas limitações, avançando com popostas destinadas a limitar os prejuízos causados pela pirataria na Internet.
description: Propriedades Intelectuais, n. 2 (2014)
Decorrelation of participant and spectator angular momenta in heavy-ion collisions
Creators: name: Adams, Joseph R.
name: Lisa, Michael A.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Nuclear Theory (nucl-th)
subject: FOS: Physical sciences

description: High-energy heavy-ion collisions contain enormous angular momentum, $|\vec{J}|$, which is $\mathcal{O}(10^3-10^6\hbar)$ in the range of collision energy, $\sqrt{s_\mathrm{NN}}$, spanned experimentally by the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). A fraction of $\vec{J}$ is transferred to the overlapping collision region, which is indispensable for measuring observables such as vorticity-driven hadron spin alignment with $\hat{J}$. Experiments estimate the orientation of $\hat{J}$ of the participant nucleons within the collision overlap region, $\hat{J}_\mathrm{part}$, by using that of the forward- and backward-going spectating nucleons $\hat{J}_\mathrm{spec}$. Using two models, we study the decorrelation between $\hat{J}_\mathrm{part}$ and $\hat{J}_\mathrm{spec}$, driven both by angular-momentum conservation and event-by-event fluctuations, as well as by the decorrelation between the orientation of the elliptic overlap region and the $\hat{J}_\mathrm{part}$. $\sqrt{s_\mathrm{NN}}$-dependent decorrelation is observed in both of these cases and is large enough to be an important corrective factor used when experimentally observing phenomena driven by $\vec{J}$.
description: 7 pages, 7 figures
Exclusive determinations of $\vert V_{cb} \vert$ and $R(D^{*})$ through unitarity
Creators: name: Martinelli, G.
name: Simula, S.
name: Vittorio, L.
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Phenomenology (hep-ph)
subject: High Energy Physics - Experiment (hep-ex)
subject: High Energy Physics - Lattice (hep-lat)
subject: FOS: Physical sciences

description: In this work we apply the Dispersive Matrix (DM) method of Refs. [1,2] to the lattice computations of the Form Factors (FFs) entering the semileptonic $B \to D^* \ell ν_\ell$ decays, recently produced by the FNAL/MILC Collaborations [3] at small, but non-vanishing values of the recoil variable ($w-1$). Thanks to the DM method we obtain the FFs in the whole kinematical range accessible to the decay in a completely model-independent and non-perturbative way, implementing exactly both unitarity and kinematical constraints. Using our theoretical bands of the FFs we extract $\vert V_{cb} \vert$ from the experimental data and compute the theoretical value of $R(D^*)$. Our final result for $\vert V_{cb} \vert$ reads $\vert V_{cb} \vert = (41.3 \pm 1.7) \cdot 10^{-3}$, compatible with the most recent inclusive estimate at the $0.5σ$ level. Moreover, we obtain the pure theoretical value $R(D^*) = 0.275 \pm 0.008$, which is compatible with the experimental world average at the $\sim 1.3 σ$ level.
description: 20 pages, 5 figures, 2 tables. Revised version including appendices describing the DM method, the application of the unitarity filters and the implementation of the kinematical constraints. Results and conclusions unchanged. Matches published version in EPJC
Uma nova lei para assegurar direitos na internet no Brasil: o Marco Civil
Creators: name: Lemos, Ronaldo
Publisher: name: Propriedades Intelectuais
Year: 2014

description: Com isso, o resultado final do Marco Civil foi uma lei tecnicamente sólida, abrangente e ambiciosa. Mais do que isso, seu texto foi saudado por especialistas de vários países como um dos mais avançados e pró-inovação que se poderia conceber naquele momento. Com isso, o Marco Civil despertou grande interesse internacional. E grande expectativa com relação ao Brasil: nosso país passou a correr o bom risco de aprovar uma das leis mais avançadas para a internet.
description: Propriedades Intelectuais, n. 2 (2014)
A family of charged compact objects with anisotropic pressure
Creators: name: Maurya, S. K.
name: Govender, M.
Publisher: name: arXiv
Year: 2017
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: Utilizing an ansatz developed by Maurya and co-workers we present a class of exact solutions of the Einstein-Maxwell field equations describing a spherically symmetric compact object. A detailed physical analysis of these solutions in terms of stability, compactness and regularity indicate that these solutions may be used to model strange star candidates. In particular, we model the strange star candidate Her X-1 and show that our solution conforms to observational data to an excellent degree of accuracy. An interesting and novel phenomenon which arises in this model is the fact that the relative difference between the electromagnetic force and the force due to pressure anisotropy changes sign within the stellar interior. This may be a an additional mechanism required for stability against cracking of the stellar object.
Por uma construção de um direito de autor imune ao esvaziamento semântico e ético de expressões utilizadas como mantras performáticos
Creators: name: Drummond, Victor Gameiro
Publisher: name: Propriedades Intelectuais
Year: 2014

description: Enquanto não for apontada a necessidade de um banho hermenêutico nos conceitos do direito de autor, as polarizações e os radicalismos ocuparão mais do que somente um papel coadjuvante, mas tomarão um espaço constante de protagonismo que não lhes caberia. Por conta deste fato, que não é o único olhar sobre o problema da crise contemporânea pela qual atravessa o direito de autor, vale a pena discutir até que ponto o uso das referidas expressões ou de seu conteúdo está de acordo com a realidade e realmente contribui para a proteção do direito de autor e mais do que isto, para o desenvolvimento da cultura, seja nos processos criativos (que conduzem à aplicação do direito de autor) seja no processo de distribuição (dos produtos e bens decorrentes deste processo criativo).
description: Propriedades Intelectuais, n. 2 (2014)
The large-$N$ limit of 4d superconformal indices for general BPS charges
Creators: name: Colombo, Edoardo
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Physics - Theory (hep-th)
subject: FOS: Physical sciences

description: We study the superconformal index of $\mathcal N=1$ quiver theories at large-$N$ for general values of electric charges and angular momenta, using both the Bethe Ansatz formulation and the more recent elliptic extension method. We are particularly interested in the case of unequal angular momenta, $J_1\ne J_2$, which has only been partially considered in the literature. We revisit the previous computation with the Bethe Ansatz formulation with generic angular momenta and extend it to encompass a large class of competing exponential terms. In the process, we also provide a simplified derivation of the original result. We consider the newly-developed elliptic extension method as well; we apply it to the $J_1\ne J_2$ case, finding a good match with the Bethe Ansatz results. We also investigate the relation between the two different approaches, finding in particular that for every saddle of the elliptic action there are corresponding terms in the Bethe Ansatz formula that match it at large-$N$.
description: 47 pages
Exclusivo, concorrência e equidade
Creators: name: Barreiros, Gonçalo Gil
Publisher: name: Propriedades Intelectuais
Year: 2014

description: O direito de autor português actual, tendo as suas raízes no droit d´auteur – o qual –, encontra a sua justificação na tutela da criação, vai-se, contudo, e seguindo uma tendência comunitária de harmonização de sistemas aproximando-se do copyright, o qual é informado, em primeira linha, pelo princípio da protecção do investimento.
description: Propriedades Intelectuais, n. 2 (2014)
A avaliação do prejuízo em matéria de contrafacção de patente
Creators: name: Fourlon, Armelle
name: Laborde, Anne-Sophie
Publisher: name: Propriedades Intelectuais
Year: 2014

description: Este estudo trata da avaliação das indemnizações em matéria de patentes. As disposições de direito das patentes não diferem das disposições relativas aos outros direitos da propriedade intelectual. A avaliação do prejuízo sofrido em virtude da contrafacção de patente pode, no entanto, revestir uma importância particular em face das somas investidas antes da outorga do título, para o desenvolvimento e ultimação de processos ou produtos patenteados, nomeadamente em certos sectores específicos onde os departamentos de investigação e desenvolvimento (I&D) têm um papel central (indústria farmacêutica, tecnologia de ponta…).
description: Propriedades Intelectuais, n. 2 (2014)
title: Управление недвижимым имуществом
Creators: name: ELS IPR BOOKS
Publisher: name: Липецкий государственный технический университет, Профобразование
Year: 2023

description: В учебном пособии изложены основные понятия и особенности рынка недвижимости и управления недвижимостью, рассмотрены виды операций и сделок, выполняемых с недвижимостью. Описаны экономическая эффективность управления объектами недвижимости, особенности анализа инвестиций в недвижимость. Подготовлено в соответствии с требованиями Федерального государственного образовательного стандарта среднего профессионального образования. Учебное пособие предназначено для студентов, обучающихся по специальности 21.02.05 «Земельно-имущественные отношения», изучающих дисциплину «Управление территориями и недвижимым имуществом».
Observational evidence for high neutronization in supernova remnants: implications for Type Ia supernova progenitors
Creators: name: Martínez-Rodríguez, Héctor
name: Badenes, Carles
name: Yamaguchi, Hiroya
name: Bravo, Eduardo
name: Timmes, F. X.
name: Miles, Broxton J.
name: Townsley, Dean M.
name: Piro, Anthony L.
name: Mori, Hideyuki
name: Andrews, Brett
name: Park, Sangwook
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: The physical process whereby a carbon--oxygen white dwarf explodes as a Type Ia supernova (SN Ia) remains highly uncertain. The degree of neutronization in SN Ia ejecta holds clues to this process because it depends on the mass and the metallicity of the stellar progenitor, and on the thermodynamic history prior to the explosion. We report on a new method to determine ejecta neutronization using Ca and S lines in the X-ray spectra of Type Ia supernova remnants (SNRs). Applying this method to \textit{Suzaku} data of Tycho, Kepler, 3C 397 and G337.2$-$0.7 in the Milky Way, and N103B in the Large Magellanic Cloud, we find that the neutronization of the ejecta in N103B is comparable to that of Tycho and Kepler, which suggests that progenitor metallicity is not the only source of neutronization in SNe Ia. We then use a grid of SN Ia explosion models to infer the metallicities of the stellar progenitors of our SNRs. The implied metallicities of 3C 397, G337.2$-$0.7, and N103B are major outliers compared to the local stellar metallicity distribution functions, indicating that progenitor metallicity can be ruled out as the origin of neutronization for these SNRs. Although the relationship between ejecta neutronization and equivalent progenitor metallicity is subject to uncertainties stemming from the $^{12}$C$\,$+$^{16}$O reaction rate, which affects the Ca/S mass ratio, our main results are not sensitive to these details.
description: 12 pages, 7 figures, accepted for publication in the ApJ
Robust Multi-dimensional Model Order Estimation Using LineAr Regression of Global Eigenvalues (LaRGE)
Creators: name: Korobkov, Alexey A.
name: Diugurova, Marina K.
name: Haueisen, Jens
name: Haardt, Martin
Publisher: name: arXiv
Year: 2021
Subjects: subject: Methodology (stat.ME)
subject: Signal Processing (eess.SP)
subject: FOS: Computer and information sciences
subject: FOS: Electrical engineering, electronic engineering, information engineering

description: The efficient estimation of an approximate model order is very important for real applications with multi-dimensional data if the observed low-rank data is corrupted by additive noise. In this paper, we present a novel robust method for model order estimation of noise-corrupted multi-dimensional low-rank data based on the LineAr Regression of Global Eigenvalues (LaRGE). The LaRGE method uses the multi-linear singular values obtained from the HOSVD of the measurement tensor to construct global eigenvalues. In contrast to the Modified Exponential Test (EFT) that also exploits the approximate exponential profile of the noise eigenvalues, LaRGE does not require the calculation of the probability of false alarm. Moreover, LaRGE achieves a significantly improved performance in comparison with popular state-of-the-art methods. It is well suited for the analysis of biomedical data. The excellent performance of the LaRGE method is illustrated via simulations and results obtained from EEG recordings.
Spinor polariton condensates under nonresonant pumping: Steady states and elementary excitations
Creators: name: Xu, Xingran
name: Hu, Ying
name: Zhang, Zhidong
name: Liang, Zhaoxin
Publisher: name: arXiv
Year: 2017
Subjects: subject: Quantum Gases (cond-mat.quant-gas)
subject: FOS: Physical sciences

description: We theoretically investigate a spinor polariton condensate under nonresonant pumping, based on driven-dissipative Gross-Pitaevskii equations coupled to the rate equation of a spin-unpolarized reservoir. We find the homogeneous polariton condensate can transit from the spin-unpolarized phase, where it is linearly polarized, to the spin-polarized phase, where it is elliptically polarized, depending on the cross-spin versus same-spin interactions and the linear polarization splitting. In both phases, we study elementary excitations using Bogoliubov approach, in a regime where the decay rate of total exciton density in reservoir crosses over from the slow to the fast limit. Depending on reservoir parameters, the global-phase mode can be either diffusive or gapped. By contrast, the relative-phase mode always possesses a gapped energy, undamped in the spin-unpolarized phase but weakly damped in the spin-polarized phase. In the spin-unpolarized phase, both modes are linearly polarized despite pumping and decay. However, in the spin-polarized phase, the mode polarization can be significantly affected by the reservoir and depends strongly on the circular polarization degree of the condensate. Interestingly, we demonstrate that the `ghost' branch of the Bogoliubov spectrum of the relative-phase mode can be visualized in the photoluminescence emission, distinguishable from that of the global-phase mode and thus allowing for experimental observation, when the spinor polariton condensate is elliptically polarized.
Detecting Important Patterns Using Conceptual Relevance Interestingness Measure
Creators: name: Ibrahim, Mohamed-Hamza
name: Missaoui, Rokia
name: Vaillancourt, Jean
Publisher: name: arXiv
Year: 2021
Subjects: subject: Artificial Intelligence (cs.AI)
subject: Social and Information Networks (cs.SI)
subject: FOS: Computer and information sciences

description: Discovering meaningful conceptual structures is a substantial task in data mining and knowledge discovery applications. While off-the-shelf interestingness indices defined in Formal Concept Analysis may provide an effective relevance evaluation in several situations, they frequently give inadequate results when faced with massive formal contexts (and concept lattices), and in the presence of irrelevant concepts. In this paper, we introduce the Conceptual Relevance (CR) score, a new scalable interestingness measurement for the identification of actionable concepts. From a conceptual perspective, the minimal generators provide key information about their associated concept intent. Furthermore, the relevant attributes of a concept are those that maintain the satisfaction of its closure condition. Thus, the guiding idea of CR exploits the fact that minimal generators and relevant attributes can be efficiently used to assess concept relevance. As such, the CR index quantifies both the amount of conceptually relevant attributes and the number of the minimal generators per concept intent. Our experiments on synthetic and real-world datasets show the efficiency of this measure over the well-known stability index.
Quantum signatures in nonlinear gravitational waves
Creators: name: Guerreiro, Thiago
name: Coradeschi, Francesco
name: Frassino, Antonia Micol
name: West, Jennifer Rittenhouse
name: Schioppa, Enrico Junior
Publisher: name: arXiv
Year: 2021
Subjects: subject: General Relativity and Quantum Cosmology (gr-qc)
subject: High Energy Physics - Phenomenology (hep-ph)
subject: Quantum Physics (quant-ph)
subject: FOS: Physical sciences

description: The effective quantum field theory description of gravity, despite its non-renormalizability, allows for predictions beyond classical general relativity. As we enter the age of gravitational wave astronomy, an important and timely question is whether measurable quantum predictions that depart from classical gravity, analogous to quantum optics effects which cannot be explained by classical electrodynamics, can be found. In this work, we investigate quantum signatures in gravitational waves using tools from quantum optics. Squeezed-coherent gravitational waves, which can exhibit sub-Poissonian graviton statistics, can enhance or suppress the signal measured by an interferometer, a characteristic effect of quantum squeezing. Moreover, we show that Gaussian gravitational wave quantum states can be reconstructed from measurements over an ensemble of optical fields interacting with a single copy of the gravitational wave, thus opening the possibility of detecting quantum features of gravity beyond classical general relativity.
description: 16 pages, 2 figures; accepted final version, expanded work, added quantum state reconstruction and more detailed calculations and information, comments welcome
Nos 90 anos de Luiz Francisco Rebello
Creators: name: Rocha, Manuel Lopes
name: Carretas, Miguel Lourenço
Publisher: name: Propriedades Intelectuais
Year: 2014

description: É impossível esquecer que, durante o último quartel do século xx, Luiz Francisco Rebello foi o responsável directo ou um dos principais impulsionadores de toda a produção legislativa em matéria de protecção de direitos de autor e direitos conexos. Luiz Francisco Rebello foi não só o principal mentor da introdução, no hoje denominado Código do Direito de Autor e dos Direitos Conexos, de algumas das normas que estão desde então ao serviço de autores, artistas e produtores, como recriou, moldou e apurou, ao longo de décadas de persistência, o próprio conceito de gestão colectiva em Portugal. Foi um notável advogado, como dissemos, e isso reflecte-se em grande parte da jurisprudência nacional sobre Direito de Autor.
description: Propriedades Intelectuais, n. 2 (2014)
Finite element approximation of the Levi-Civita connection and its curvature in two dimensions
Creators: name: Berchenko-Kogan, Yakov
name: Gawlik, Evan S.
Publisher: name: arXiv
Year: 2021
Subjects: subject: Numerical Analysis (math.NA)
subject: Differential Geometry (math.DG)
subject: FOS: Mathematics
subject: 65N30, 53A70, 83C27

description: We construct finite element approximations of the Levi-Civita connection and its curvature on triangulations of oriented two-dimensional manifolds. Our construction relies on the Regge finite elements, which are piecewise polynomial symmetric (0,2)-tensor fields possessing single-valued tangential-tangential components along element interfaces. When used to discretize the Riemannian metric tensor, these piecewise polynomial tensor fields do not possess enough regularity to define connections and curvature in the classical sense, but we show how to make sense of these quantities in a distributional sense. We then show that these distributional quantities converge in certain dual Sobolev norms to their smooth counterparts under refinement of the triangulation. We also discuss projections of the distributional curvature and distributional connection onto piecewise polynomial finite element spaces. We show that the relevant projection operators commute with certain linearized differential operators, yielding a commutative diagram of differential complexes.
description: v2: Several revisions throughout, including major revisions to Section 2.4, Section 5, and the beginning of Section 7
Phase diagram of the triangular-lattice Potts antiferromagnet
Creators: name: Jacobsen, Jesper Lykke
name: Salas, Jesús
name: Scullard, Christian R.
Publisher: name: arXiv
Year: 2017
Subjects: subject: Statistical Mechanics (cond-mat.stat-mech)
subject: FOS: Physical sciences

description: We study the phase diagram of the triangular-lattice $Q$-state Potts model in the real $(Q,v)$-plane, where $v=e^J-1$ is the temperature variable. Our first goal is to provide an obviously missing feature of this diagram: the position of the antiferromagnetic critical curve. This curve turns out to possess a bifurcation point with two branches emerging from it, entailing important consequences for the global phase diagram. We have obtained accurate numerical estimates for the position of this curve by combining the transfer-matrix approach for strip graphs with toroidal boundary conditions and the recent method of critical polynomials. The second goal of this work is to study the corresponding $A_{p-1}$ RSOS model on the torus, for integer $p=4,5,\ldots,8$. We clarify its relation to the corresponding Potts model, in particular concerning the role of boundary conditions. For certain values of $p$, we identify several new critical points and regimes for the RSOS model and we initiate the study of the flows between the corresponding field theories.
description: 56 pages (pdflatex). Contains a .bbl file, 33 figures in pdf format, and a mathematica file triangular.m. The tex source uses IOP and tikz macros (not included). Minor changes with respect to v1. Final version published in the journal
Victorian Era Ballet Performers and Gender Roles Exhibition
Creators: name: Welby, Casey
Publisher: name: University of Chicago
Year: 2022
Subjects: subject: Exhibition
subject: Curation
subject: Ballet
subject: Gender Roles
subject: Tragedy

description: This exhibition examines nineteenth-century English ballerinas and the coinciding gendered themes of the era. My thesis is in the form of a traveling museum exhibition proposal on the professional lives of ballerinas during the Victorian Era in England. A "traveling" exhibition generally includes pieces from various collections. A traveling exhibition would allow a larger audience to enjoy and learn from the collection because it would be more mobile and accessible. This exhibit offers people a new way of looking at and experiencing Victorian ballet. Ballet is often associated with fashion, beauty, and effortlessness. While there are truths to these observations, ballet has a gritty side, especially when ballet first became popular in Great Britain. Viewers may be surprised by the poor working conditions of the corps de ballet and even the mistreatment of star ballerinas. Viewers should come away with their own observations about gender roles in Victorian England, the idea of ballerinas as celebrities, and ballet as an art form.
"Super-Kilonovae" from Massive Collapsars as Signatures of Black-Hole Birth in the Pair-instability Mass Gap
Creators: name: Siegel, Daniel M.
name: Agarwal, Aman
name: Barnes, Jennifer
name: Metzger, Brian D.
name: Renzo, Mathieu
name: Villar, V. Ashley
Publisher: name: arXiv
Year: 2021
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: Solar and Stellar Astrophysics (astro-ph.SR)
subject: General Relativity and Quantum Cosmology (gr-qc)
subject: FOS: Physical sciences

description: The core collapse of rapidly rotating massive ~10 Msun stars ("collapsars"), and resulting formation of hyper-accreting black holes, are a leading model for the central engines of long-duration gamma-ray bursts (GRB) and promising sources of r-process nucleosynthesis. Here, we explore the signatures of collapsars from progenitors with extremely massive helium cores >130 Msun above the pair-instability mass gap. While rapid collapse to a black hole likely precludes a prompt explosion in these systems, we demonstrate that disk outflows can generate a large quantity (up to >50 Msun) of ejecta, comprised of >5-10 Msun in r-process elements and ~0.1-1 Msun of $^{56}$Ni, expanding at velocities ~0.1c. Radioactive heating of the disk-wind ejecta powers an optical/infrared transient, with a characteristic luminosity $\sim 10^{42}$ erg s$^{-1}$ and spectral peak in the near-infrared (due to the high optical/UV opacities of lanthanide elements) similar to kilonovae from neutron star mergers, but with longer durations $\gtrsim$ 1 month. These "super-kilonovae" (superKNe) herald the birth of massive black holes >60 Msun, which, as a result of disk wind mass-loss, can populate the pair-instability mass gap 'from above' and could potentially create the binary components of GW190521. SuperKNe could be discovered via wide-field surveys such as those planned with the Roman Space Telescope or via late-time infrared follow-up observations of extremely energetic GRBs. Gravitational waves of frequency ~0.1-50 Hz from non-axisymmetric instabilities in self-gravitating massive collapsar disks are potentially detectable by proposed third-generation intermediate and high-frequency observatories at distances up to hundreds of Mpc; in contrast to the "chirp" from binary mergers, the collapsar gravitational-wave signal decreases in frequency as the disk radius grows ("sad trombone").
description: 36 pages, 21 figures, 2 tables
The Peculiar Multi-Wavelength Evolution Of V1535 Sco
Creators: name: Linford, J. D.
name: Chomiuk, L.
name: Nelson, T.
name: Finzell, T.
name: Walter, F. M.
name: Sokoloski, J. L.
name: Mukai, K.
name: Mioduszewski, A. J.
name: van der Horst, A. J.
name: Weston, J. H. S.
name: Rupen, M. P.
Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Astrophysical Phenomena (astro-ph.HE)
subject: FOS: Physical sciences

description: We present multi-wavelength observations of the unusual nova V1535 Sco throughout its outburst in 2015. Early radio observations were consistent with synchrotron emission, and early X-ray observations revealed the presence of high-energy (>1 keV) photons. These indicated that strong shocks were present during the first ~2 weeks of the nova's evolution. The radio spectral energy distribution was consistent with thermal emission from week 2 to week 6. Starting in week 7, the radio emission again showed evidence of synchrotron emission and there was an increase in X-ray emission, indicating a second shock event. The optical spectra show evidence for at least two separate outflows, with the faster outflow possibly having a bipolar morphology. The optical and near infrared light curves and the X-ray measurements of the hydrogen column density indicated that the companion star is likely a K giant.
description: 20 pages, 13 figures, under review at ApJ, updated to match the most recent version submitted to the referee