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pro vyhledávání: '"Cunha Pedro"'
The Einstein field equations, or generalizations thereof, are difficult to solve analytically. On the other hand, numerical solutions of the same equations have become increasingly common, in particular concerning compact objects. Whereas analytic ap
Externí odkaz:
http://arxiv.org/abs/2405.15651
Autor:
Machado, Mateus G., Melo, João G., Zanchettin, Cleber, Braga, Pedro H. M., Cunha, Pedro V., Barros, Edna N. S., Bassani, Hansenclever F.
This work investigates the potential of Reinforcement Learning (RL) to tackle robot motion planning challenges in the dynamic RoboCup Small Size League (SSL). Using a heuristic control approach, we evaluate RL's effectiveness in obstacle-free and sin
Externí odkaz:
http://arxiv.org/abs/2404.15410
We analyse the lensing images by dynamically robust rotating (mini-)Proca stars surrounded by thin accretion disks. Due to their peculiar geodesic structure we show that these images exhibit striking similarities with the ones of BHs, for appropriate
Externí odkaz:
http://arxiv.org/abs/2402.14919
It has been established that Black Hole (BH) spacetimes obeying some general set of assumptions always possess, at least, one light ring (per rotation sense) [arXiv:2003.06445]. This theorem was originally established for asymptotically flat, station
Externí odkaz:
http://arxiv.org/abs/2401.05495
Autor:
Loss, Flavio P., da Cunha, Pedro H., Rocha, Matheus B., Zanoni, Madson Poltronieri, de Lima, Leandro M., Nascimento, Isadora Tavares, Rezende, Isabella, Canuto, Tania R. P., Vieira, Luciana de Paula, Rossoni, Renan, Santos, Maria C. S., Frasson, Patricia Lyra, Romão, Wanderson, Filgueiras, Paulo R., Krohling, Renato A.
Skin lesions are classified in benign or malignant. Among the malignant, melanoma is a very aggressive cancer and the major cause of deaths. So, early diagnosis of skin cancer is very desired. In the last few years, there is a growing interest in com
Externí odkaz:
http://arxiv.org/abs/2401.01200
Autor:
Ayzenberg, Dimitry, Blackburn, Lindy, Brito, Richard, Britzen, Silke, Broderick, Avery E., Carballo-Rubio, Raúl, Cardoso, Vitor, Chael, Andrew, Chatterjee, Koushik, Chen, Yifan, Cunha, Pedro V. P., Davoudiasl, Hooman, Denton, Peter B., Doeleman, Sheperd S., Eichhorn, Astrid, Eubanks, Marshall, Fang, Yun, Foschi, Arianna, Fromm, Christian M., Galison, Peter, Ghosh, Sushant G., Gold, Roman, Gurvits, Leonid I., Hadar, Shahar, Held, Aaron, Houston, Janice, Hu, Yichao, Johnson, Michael D., Kocherlakota, Prashant, Natarajan, Priyamvada, Olivares, Héctor, Palumbo, Daniel, Pesce, Dominic W., Rajendran, Surjeet, Roy, Rittick, Saurabh, Shao, Lijing, Tahura, Shammi, Tamar, Aditya, Tiede, Paul, Vincent, Frédéric H., Visinelli, Luca, Wang, Zhiren, Wielgus, Maciek, Xue, Xiao, Yakut, Kadri, Yang, Huan, Younsi, Ziri
The Event Horizon Telescope (EHT) Collaboration recently published the first images of the supermassive black holes in the cores of the Messier 87 and Milky Way galaxies. These observations have provided a new means to study supermassive black holes
Externí odkaz:
http://arxiv.org/abs/2312.02130
Autor:
Dobie, Dougal, Sluse, Dominique, Deller, Adam, Murphy, Tara, Krone-Martins, Alberto, Stern, Daniel, Wang, Ziteng, Wang, Yuanming, hm, Céline Bøe, Djorgovski, S. G., Galluccio, Laurent, Delchambre, Ludovic, Connor, Thomas, Brok, Jakob Sebastiaan den, Cunha, Pedro H. Do Vale, Ducourant, Christine, Graham, Matthew J., Jalan, Priyanka, Klioner, Sergei A., Klüter, Jonas, Mignard, François, Negi, Vibhore, Petit, Quentin, Scarano Jr, Sergio, Slezak, Eric, Surdej, Jean, Teixeira, Ramachrisna, Walton, Dominic J., Wamsbsganss, Joachim
We present radio observations of 24 confirmed and candidate strongly lensed quasars identified by the Gaia Gravitational Lenses (GraL) working group. We detect radio emission from 8 systems in 5.5 and 9 GHz observations with the Australia Telescope C
Externí odkaz:
http://arxiv.org/abs/2311.07836
Autor:
Lima, Rui M., Lopes, Erik Teixeira, Lopes, Derek Chaves, Gonçalves, Bruno S., Cunha, Pedro G.
Publikováno v:
Business Process Management Journal, 2024, Vol. 30, Issue 8, pp. 207-231.
Externí odkaz:
http://www.emeraldinsight.com/doi/10.1108/BPMJ-08-2023-0632
Within nonlinear electrodynamics (NED), photons follow null geodesics of an effective geometry, which is different from the geometry of the spacetime itself. Over the last years, several works were dedicated to investigate the motion of photons in th
Externí odkaz:
http://arxiv.org/abs/2305.04776