103 documents found, page 1 of 11
Impact of higher derivative corrections to general relativity on black hole mer...
Dias, J. M.; Frassino, A. M.; Lopes, D. C.; Paccoia, V. D.; Rocha, J. V.The merging of two black holes is a notoriously difficult process to describe exactly. Nevertheless, the hindrances posed by gravity’s nonlinearity can be circumvented by focusing on the strict extreme mass ratio limit, in which one of the black holes is infinitely larger than the other. Such an approach has been developed by Emparan and Martínez and applied within general relativity to investigate the time evo...
Black hole-wormhole collisions and the emergence of islands
Dias, J. M.; Frassino, A. M.; Paccoia, V. D.; Rocha, J. V.We use ray-tracing techniques to determine the evolution of the event horizon of a large black hole that “gobbles” a tiny, traversable wormhole. This calculation has physical meaning in the extreme mass ratio limit. Two setups are considered; a single-mouth wormhole connecting two otherwise independent universes, and a double-mouth zero-length wormhole within the same universe. In the first setting it turns out...
An automated bi‐level optimization approach for IMRT
Carrasqueira, P.; Alves, M. J.; Dias, J. M.; Rocha, H.; Ventura, T.; Ferreira, B. C.; Lopes, M. C.Intensity-modulated radiation therapy is used worldwide to treat cancer patients. The objective of this treat-ment is to deliver a prescribed radiation dose to the tumor while sparing, as much as possible, all the healthytissues, especially organs at risk (OAR). This means that the planning of a radiotherapy treatment shouldtake into consideration conflicting objectives: to be able to spare as much as possible t...
Coastal warming under climate change: global, faster and heterogeneous
Varela, R.; de Castro, M.; Dias, J. M.; Gómez-Gesteira, M.The assessment of expected changes in coastal sea surface temperature (SST) on a global scale is becoming increasingly important due to the growing pressure on coastal ecosystems caused by climate change. To achieve this objective, 17 Global Climate Models from CMIP6 were used, with data from historical and hist-1950 experiments spanning 1982-2050. This analysis highlights significant warming of coastal areas w...
Y (3940) as a mixed charmonium-molecule state
Albuquerque, R. M. [UNESP]; Dias, J. M.; Nielsen, M.; Zanetti, C. M.Made available in DSpace on 2022-04-29T07:14:33Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-04-10; Using the QCD sum rules approach, we study the mass and the decay widths of the Y(3940) state, assuming that it can be described by a mixed charmonium-molecule scalar state, i.e., a mixture between the χc0 charmonium and D*D̄* molecule. Using a current with JPC=0++, we estimate for the mixing angle, θ=(...
Greater omentum pedicle flap as adjunctive treatment oftibial osteomyelitis in ...
Sonego, D. A.; Moi, T. S. M. [UNESP]; Pires, M. A. M.; Dias, J. M.; Kemper, B.; Amude, A. M.; Cunha, O.; Yamauchi, K. C. I.Made available in DSpace on 2021-06-25T11:47:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-11-01. Added 1 bitstream(s) on 2021-07-15T14:36:21Z : No. of bitstreams: 1 S0102-09352020000602259.pdf: 424603 bytes, checksum: fef17245fac5e65bac43f8d701f11e38 (MD5); Osteomyelitis is a therapeutic challenge in orthopedics, capable of delaying or even preventing bone healing. The omentum has been used in diff...
An automated treatment planning strategy for highly noncoplanar radiotherapy ar...
Carrasqueira, P.; Rocha, H.; Dias, J. M.; Ventura, T.; Ferreira, B. C.; Lopes, M. C.Radiation therapy is a technology-driven cancer treatment modality that has experienced significant advances over the last decades, due to multidisciplinary contributions that include engineering and computing. Recent technological developments allow the use of noncoplanar volumetric modulated arc therapy (VMAT), one of the most recent photon treatment techniques, in clinical practice. In this work, an automate...
An automated treatment planning strategy for highly noncoplanar radiotherapy ar...
Carrasqueira, P.; Rocha, Humberto; Dias, J. M.; Ventura, T.; Ferreira, B. C.; Lopes, M. C.Radiation therapy is a technology-driven cancer treatment modality that has experienced significant advances over the last decades, thanks to multidisciplinary contributions that include engineering and computing. Recent technological developments allow the use of noncoplanar volumetric arc therapy (VMAT), one of the most recent photon treatment techniques, in clinical practice. In this work, an automated nonco...
An automated bi‐level optimization approach for IMRT
Carrasqueira, P.; Alves, M. J.; Dias, J. M.; Rocha, H.; Ventura, T.; Ferreira, B. C.; Lopes, M. C.Intensity-modulated radiation therapy is used worldwide to treat cancer patients. The objective of this treatment is to deliver a prescribed radiation dose to the tumor while sparing, as much as possible, all the healthy tissues, especially organs at risk (OAR). This means that the planning of a radiotherapy treatment should take into consideration conflicting objectives: to be able to spare as much as possible...
Early prediction of durum wheat yield in Spain using radial basis functions int...
Rocha, H.; Dias, J. M.Durum wheat is an important crop in semi-arid Mediterranean regions as Andalusia, an autonomous community in the southern part of Spain. Accurate early predictions of durum wheat yield can provide precious information for within-season adjustment of crop managing as well as for economical and political stakeholders. In this study, an alternative methodology to mechanistic crop models is proposed for within-seas...