Zobrazeno 1 - 10
of 178 560
pro vyhledávání: '"Nogueira, A."'
In this manuscript, we put forth a general scheme for defining initial value problems from Einstein's equations of General Relativity constrained by homogeneous and isotropic expansion. The cosmological models arising as solutions are naturally inter
Externí odkaz:
http://arxiv.org/abs/2408.01644
Autor:
Nogueira, Pedro H.
We are in a golden era observing Young Stellar Objects (YSOs), protoplanetary disks, and substellar objects, crucial for understanding their formation and evolution. This Ph.D. thesis explores two binary systems. Firstly, we study an eruptive YSO, HB
Externí odkaz:
http://arxiv.org/abs/2407.13897
Autor:
Gomes, Raphael Fortes Infante, Rocha, Julio Cesar Siqueira, Nogueira, Wallon Anderson Tadaiesky, Dias, Rodrigo Alves
We unravel the Rodeo Algorithm to determine the eigenstates and eigenvalues spectrum for a general Hamiltonian considering arbitrary initial states. By presenting a novel methodology, we detail the original method and show how to define all propertie
Externí odkaz:
http://arxiv.org/abs/2407.11301
Autor:
Lopez-Richard, Victor, Meneghetti Jr, Luiz A., Nogueira, Gabriel L., Hartmann, Fabian, Graeff, Carlos F. O.
Despite the remarkable progress in emerging solar cell technologies such as hybrid organic-inorganic perovskites, there are still significant limitations related to the stability of the devices and their non-ideal electrical behavior under certain ex
Externí odkaz:
http://arxiv.org/abs/2407.04814
3D human pose estimation aims to reconstruct the human skeleton of all the individuals in a scene by detecting several body joints. The creation of accurate and efficient methods is required for several real-world applications including animation, hu
Externí odkaz:
http://arxiv.org/abs/2407.03817
Despite advancements in Natural Language Processing (NLP) and the growing availability of pretrained models, the English language remains the primary focus of model development. Continued pretraining on language-specific corpora provides a practical
Externí odkaz:
http://arxiv.org/abs/2406.10806
Autor:
Silva, Renato M., Azevedo, Gregório F., Berto, Matheus V. V., Rocha, Jean R., Fidelis, Eduardo C., Nogueira, Matheus V., Lisboa, Pedro H., Almeida, Tiago A.
Traffic incidents involving vulnerable road users (VRUs) constitute a significant proportion of global road accidents. Advances in traffic communication ecosystems, coupled with sophisticated signal processing and machine learning techniques, have fa
Externí odkaz:
http://arxiv.org/abs/2405.19202
Autor:
Nogueira, P. H., Lazzoni, C., Zurlo, A., Bhowmik, T., Donoso-Oliva, C., Desidera, S., Milli, J., Pérez, S., Delorme, P., Fernadez, A., Langlois, M., Petrus, S., Cabrera-Vives, G., Chauvin, G.
Publikováno v:
A&A 687, A301 (2024)
$\eta$ Tel is an 18 Myr system with a 2.09 M$_{\odot}$ A-type star and an M7-M8 brown dwarf companion, $\eta$ Tel B, separated by 4.2'' (208 au). High-contrast imaging campaigns over 20 years have enabled orbital and photometric characterization. $\e
Externí odkaz:
http://arxiv.org/abs/2405.04723
A quantum system governed by a non-Hermitian Hamiltonian may exhibit zero temperature phase transitions that are driven by interactions, just as its Hermitian counterpart, raising the fundamental question how non-Hermiticity affects quantum criticali
Externí odkaz:
http://arxiv.org/abs/2404.17373
Autor:
de Gracia, G. B., Nogueira, A. A.
In this work we extend the Kugo-Ojima-Nakanishi covariant operator formalism to quantize two higher derivative systems, considering their extended phase space structures. More specifically, the one describing spin-$0$ particles by a vector field and
Externí odkaz:
http://arxiv.org/abs/2404.11805