Marketing is an area that has always been updated over time, considering it fundamental to adapt to the changes and evolution of the market and consumers. Consequently, the enlargement of marketing to new areas has be...
Marketing is an area that has always been updated over time, considering it fundamental to adapt to the changes and evolution of the market and consumers. Consequently, the enlargement of marketing to new areas has been a growing reality. Based on this reality and within the scope of Religious Marketing, a study was carried out for the Parish of Poiares, in Portugal. The general objective was to characterize the profile of the parishioners, with the intention of subsequently defining strategies and implementing religious marketing tactics in the context of the parish of Poiares. To this end, an empirical work of qualitative nature was carried out, through the application of a questionnaire survey to a non-probabilistic convenience sample of 120 individuals. This empirical work had as its main objectives to understand the level of spirituality/involvement of the parishioners and the factors that register their greater or lesser satisfaction.
A convolutional code C over Zpr[D] is a Zpr[D]-submodule of Znpr[D] where Zpr[D] stands for the ring of polynomials with coefficients in Zpr. In this paper we study the list decoding problem of these codes when the tr...
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The term Stone-type duality often refers to a dual equivalence between a category of lattices or other partially ordered structures on one side and a category of topological structures on the other. This paper is part...
We investigate quasitopological black holes in (2+1) dimensions in the context of electromagnetic-generalized-quasitopological gravities (EM-GQT). For three different families of geometries of quasitopological nature,...
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We investigate quasitopological black holes in (2+1) dimensions in the context of electromagnetic-generalized-quasitopological gravities (EM-GQT). For three different families of geometries of quasitopological nature, we study the causal structure and their response to a probe scalar field. To linear order, we verify that the scalar field evolves stably, decaying in different towers of quasinormal modes. The studied black holes are either charged geometries (regular and singular) or a regular Bañados-Teitelboim-Zanelli (BTZ)-like black hole, both coming from the EM-GQT theory characterized by nonminimal coupling parameters between gravity and a background scalar field. We calculate the quasinormal modes applying different numerical methods with convergent results between them. The oscillations demonstrate a very peculiar structure for charged black holes: in the intermediate and near extremal cases, a particular scaling arises, similar to that of the rotating BTZ geometry, with the modes being proportional to the distance between horizons. For the single horizon black hole solution, we identify the presence of different quasinormal families by analyzing the features of that spectrum. In all three considered geometries, no instabilities were found.
We study the Skyrmion of the SO(2) gauged O(3) sigma model in 2 + 1 dimensions in the presence of a Skyrme–Chern-Simons (SCS) term, and compare its properties with the corresponding properties of the Skyrmion in the ...
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We consider axially symmetric solutions of the U(1) gauged Skyrme model supplemented with a Callan-Witten (CW) anomaly density term. The main properties of the solutions are studied, several specific features introduc...
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One of the most important tools used in companies is visual communication. A logo is part of a brand entity and therefore, a way to communicate their values or mission. This work aims to verify whether the different c...
One of the most important tools used in companies is visual communication. A logo is part of a brand entity and therefore, a way to communicate their values or mission. This work aims to verify whether the different colors used in the logo can awaken differentiated emotions in consumers. A questionnaire was prepared with the Facebook logo, varying in color. Through the obtained data, it was possible to conclude that color is a key element of a logo. When a new or reformulated logo is performed, companies should be aware that color could influence consumer perception.
作者：
Jorge F. M. DelgadoDepartamento de Matemática
Universidade de Aveiro Center for Research and Development in Mathematics and Applications-CIDMA Campus de Santiago Aveiro 3810-183 Portugal Centro de Astrofísica e Gravitação-CENTRA
Departamento de Física Instituto Superior Técnico-IST Universidade de Lisboa-UL Av. Rovisco Pais 1 Lisboa 1049-001 Portugal
Recently, it has been shown that the radial stability of a light ring (LR) in a spacetime generated by a stationary, axisymmetric, asymptotically flat object with a Z2 symmetry determines the possibility and radial st...
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Recently, it has been shown that the radial stability of a light ring (LR) in a spacetime generated by a stationary, axisymmetric, asymptotically flat object with a Z2 symmetry determines the possibility and radial stability of timelike circular orbits (TCOs) around the LR. In this paper, we generalize this result by also considering the vertical (angular) stability of the orbits through the study of the radial and vertical epicyclic frequencies. We show that the vertical stability of the LR only determines the vertical stability of the TCOs around it. A relation between the sum of the squared epicyclic frequencies and the Ricci tensor is also provided. With such relation, we show that objects with radially and vertically unstable LRs (TCOs) violate the null (strong) energy condition.
Belief propagation is a well-studied algorithm for approximating local marginals of multivariate probability distribution over complex networks, while tensor network states are powerful tools for quantum and classical...
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Belief propagation is a well-studied algorithm for approximating local marginals of multivariate probability distribution over complex networks, while tensor network states are powerful tools for quantum and classical many-body problems. Building on a recent connection between the belief propagation algorithm and the problem of tensor network contraction, we propose a block belief propagation algorithm for contracting two-dimensional (2D) tensor networks and approximating the ground state of 2D systems. The advantages of our method are threefold: (1) the same algorithm works for both finite and infinite systems; (2) it allows natural and efficient parallelization; and (3) given its flexibility, it would allow us to deal with different unit cells. As applications, we use our algorithm to study the 2D Heisenberg and transverse Ising models, and show that the accuracy of the method is on par with state-of-the-art results.
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