Zobrazeno 1 - 10
of 963
pro vyhledávání: '"FERNÁNDEZ, Nicolás"'
Supermassive black holes with masses $\gtrsim 10^9\,M_\odot$ have been discovered by JWST at high redshifts ($z\sim 7$). It is difficult to explain such objects as the result of accretive growth of stellar-mass seeds, as the rate at which baryons can
Externí odkaz:
http://arxiv.org/abs/2410.06252
Autor:
Paz-Martín, José, Schüller, Andreas, Bourgouin, Alexandra, Gago-Arias, Araceli, Gonzalez-Castaño, Diego M., Gómez-Fernández, Nicolás, Pardo-Montero, Juan, Gómez, Faustino
Air-vented ionization chambers exposed to clinical radiation beams may suffer from recombination during the drift of the charge carriers towards the electrodes. Thus, dosimetry protocols recommend the use of a correction factor, usually denominated s
Externí odkaz:
http://arxiv.org/abs/2410.02696
Autor:
Croker, Kevin S., Tarlé, Gregory, Ahlen, Steve P., Cartwright, Brian G., Farrah, Duncan, Fernandez, Nicolas, Windhorst, Rogier A.
Recent baryon acoustic oscillation (BAO) measurements by the Dark Energy Spectroscopic Instrument (DESI) provide evidence that dark energy (DE) evolves with time, as parameterized by a $w_0 w_a$ equation of state. Cosmologically coupled black holes (
Externí odkaz:
http://arxiv.org/abs/2405.12282
We show that a rotating axion field that makes a transition from a matter-like equation of state to a kination-like equation of state around the epoch of recombination can significantly ameliorate the Hubble tension, i.e., the discrepancy between the
Externí odkaz:
http://arxiv.org/abs/2405.12268
Cosmological first order phase transitions are typically associated with physics beyond the Standard Model, and thus of great theoretical and observational interest. Models of phase transitions where the energy is mostly converted to dark radiation c
Externí odkaz:
http://arxiv.org/abs/2402.13309
Autor:
Ayobi, Nicolás, Rodríguez, Santiago, Pérez, Alejandra, Hernández, Isabela, Aparicio, Nicolás, Dessevres, Eugénie, Peña, Sebastián, Santander, Jessica, Caicedo, Juan Ignacio, Fernández, Nicolás, Arbeláez, Pablo
This paper presents the Holistic and Multi-Granular Surgical Scene Understanding of Prostatectomies (GraSP) dataset, a curated benchmark that models surgical scene understanding as a hierarchy of complementary tasks with varying levels of granularity
Externí odkaz:
http://arxiv.org/abs/2401.11174
Early matter-dominated eras (EMDEs) are a natural feature arising in many models of the early universe and can generate a stochastic gravitational wave background (SGWB) during the transition from an EMDE to the radiation-dominated universe required
Externí odkaz:
http://arxiv.org/abs/2312.12499
Autor:
Farrah, Duncan, Croker, Kevin S., Tarlé, Gregory, Faraoni, Valerio, Petty, Sara, Afonso, Jose, Fernandez, Nicolas, Nishimura, Kurtis A., Pearson, Chris, Wang, Lingyu, Zevin, Michael, Clements, David L, Efstathiou, Andreas, Hatziminaoglou, Evanthia, Lacy, Mark, McPartland, Conor, Pitchford, Lura K, Sakai, Nobuyuki, Weiner, Joel
Publikováno v:
ApJL 944 L31 (2023)
Observations have found black holes spanning ten orders of magnitude in mass across most of cosmic history. The Kerr black hole solution is however provisional as its behavior at infinity is incompatible with an expanding universe. Black hole models
Externí odkaz:
http://arxiv.org/abs/2302.07878
Publikováno v:
Eur. Phys. J. B 96, 68 (2023)
The interplay between topological defects, such as dislocations or disclinations, and the electronic degrees of freedom in graphene has been extensively studied. In the literature, for the study of this kind of problems, it is in general used either
Externí odkaz:
http://arxiv.org/abs/2302.04804
Autor:
Valderrama, Natalia, Puentes, Paola Ruiz, Hernández, Isabela, Ayobi, Nicolás, Verlyk, Mathilde, Santander, Jessica, Caicedo, Juan, Fernández, Nicolás, Arbeláez, Pablo
Publikováno v:
Medical Image Computing and Computer Assisted Intervention 2022
Most benchmarks for studying surgical interventions focus on a specific challenge instead of leveraging the intrinsic complementarity among different tasks. In this work, we present a new experimental framework towards holistic surgical scene underst
Externí odkaz:
http://arxiv.org/abs/2212.04582