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19 results on '"Bringas, F."'

2. On singularities of the Gauss map components of surfaces in ${\mathbb R}^4$

Author

Domitrz, W., Hernández-Martínez, L. I., and Sánchez-Bringas, F.

Subjects
Mathematics - Differential Geometry, Differential Geometry (math.DG), FOS: Mathematics, 53C42, 58K05, 58K30, 58K25, 53A05
Abstract

The Gauss map of a generic immersion of a smooth, oriented surface into $\mathbb R^4$ is an immersion. But this map takes values on the Grassmanian of oriented 2-planes in $\mathbb R^4$. Since this manifold has a structure of a product of two spheres, the Gauss map has two components that take values on the sphere. We study the singularities of the components of the Gauss map and relate them to the geometric properties of the generic immersion. Moreover, we prove that the singularities are generically stable, and we connect them to the contact type of the surface and $\mathcal J$-holomorphic curves with respect to an orthogonal complex structure $\mathcal J$ on $\mathbb R^4$. Finally, we get some formulas of Gauss-Bonnet type involving the geometry of the singularities of the components with the geometry and topology of the surface., 27 pages, 1 figures

Published
2022

9. North Atlantic subpolar gyre along predetermined ship tracks since 1993 : a monthly data set of surface temperature, salinity, and density

Author

Reverdin, G., Valdimarsson, H., Alory, Gaël, Diverrès, Denis, Bringas, F., Goni, G., Heilmann, L., Chafik, L., Szekely, T., and Friedman, A. R.

Abstract

We present a binned product of sea surface temperature, sea surface salinity, and sea surface density data in the North Atlantic subpolar gyre from 1993 to 2017 that resolves seasonal variability along specific ship routes (

Published
2018

11. Demography, preventative healthcare and reason for relinquishment of donkeys to an equine charity in the UK (2013‐2015).

Author

Fernandez, Elena Barrio, De Blas Giral, Ignacio, Thiemann, Alex K., and Vázquez Bringas, F. J.

Abstract

Background: In the UK, there are thousands of donkeys being cared for by charities; however, little is known about the reasons for relinquishment or their previous health status, with even less information available in published literature. Such information could help to identify factors contributing to poor equine welfare and guide the development of appropriate educational resources. Objectives: To describe the characteristics of the relinquished donkeys and to better understand the current preventative healthcare status of donkeys relinquished into The Donkey Sanctuary. Study design: Cross‐sectional observational survey. Methods: A total of 596 donkeys were admitted during a 30‐month period. Each had a health check at arrival; and previous management information was provided by the owner. Data were retrieved from The Donkey Sanctuary database, inputted into a specific Microsoft Access 2016 database then exported for analysis in IBM SPSS 19.0 for Windows®. Mules and ponies were excluded from the study. Results: Many donkeys arrived without a valid passport (32.3%) or microchip (49.7%). Only 23.2% were fully protected against influenza and tetanus and 21.0% of the donkeys had no previous anthelmintic treatment history. Geriatric donkeys often suffered from moderate to severe dental disease in need of advanced treatment, and 43.9% had received no dental treatment within the last year. Overall 26.3% of donkeys were classed as overweight and 8.6% were obese. The median time since the last hoof trim was 10 weeks. Main limitation: The health status of the studied donkeys may have been affected by the reasons for relinquishment, and associations require further investigation. Conclusions: This study highlights the need for improving preventative healthcare in donkeys to ensure better welfare within the population. [ABSTRACT FROM AUTHOR]

Published
2021
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13. Outbreak of 2009 pandemic influenza A (H1N1) on a Peruvian Navy ship--June-July 2009

Author

Vera, D.M., Gonzaga, V., Hora, R.A., Ramos, M., de Mola, C. Loret, Neyra, J.M., Sanchez, C., Kochel, T., Sklar, M.J., Montgomery, J.M., Quispe, J.A., Bringas, F., Cespedes, M., Gonzalez, S., Larru, M., Fernandez, M., Faix, D., Meyers, C., Blair, P., Mote, P., Blazes, D.L., and Quandelacy, T.

Subjects
Swine influenza -- Statistics -- Diagnosis -- Demographic aspects, Warships -- Officials and employees, Disease transmission -- Methods, Health
Abstract

On June 25, 2009, a naval cadet reported to the infirmary of a 355-crewman Peruvian Navy ship with a febrile acute respiratory infection (FARI) 5 days after the ship docked [...]

Published
2010

14. Double resonances in Borromean heteronuclear triatomic systems

Author

Bringas, F., Yamashita, M. T., Frederico, T., and Tomio, L.

Subjects
Quantum Gases (cond-mat.quant-gas), Atomic Physics (physics.atom-ph), FOS: Physical sciences, Condensed Matter - Quantum Gases, Physics - Atomic Physics
Abstract

We investigate the occurrence of Borromean three-body continuum s-wave resonances, in an $\alpha\alpha\beta$ system for large negative two-body scattering lengths. The energy and width are determined by a scaling function with arguments given by energy ratios of the two-body virtual state subsystem energies with the shallowest three-body bound state. The Borromean continuum resonances emerging from Efimov states present a peculiar behavior for trapped ultracold atoms near a Feshbach resonance: two resonances with equal energies at different values of the scattering length. The corresponding three-body recombination peaks should merge as the temperature is raised, with one moving towards lower values of the scattering length as the other moves to larger values.

Published
2010

15. Codazzi fields on surfaces immersed in Euclidean 4-space

Author

Gutiérrez Núñez, J.M., Romero Fuster, M.C., and Sánchez-Bringas, F.

Subjects
57R25, Mathematics::Differential Geometry, 53A05
Abstract

Consider a Riemannian vector bundle of rank 1 defined by a normal vector field $\nu$ on a surface $M$ in $\mathbb{R}^{4}$. Let $\mathrm{II}_{\nu}$ be the second fundamental form with respect to $\nu$ which determines a configuration of lines of curvature. In this article, we obtain conditions on $\nu$ to isometrically immerse the surface $M$ with $\mathrm{II}_{\nu}$ as a second fundamental form into $\mathbb{R}^{3}$. Geometric restrictions on $M$ are determined by these conditions. As a consequence, we analyze the extension of Loewner's conjecture, on the index of umbilic points of surfaces in $\mathbb{R}^{3}$, to special configurations on surfaces in $\mathbb{R}^{4}$.

Published
2008

16. Measurement of Proton-Induced Reaction Cross Sections in Ti, Ni and Zr near the Threshold.

Author

Bringas, F., Yamashita, M. T., Goldman, I. D., Pascholati, P. R., and Sciani, V.

Subjects
*NUCLEAR cross sections, *COLLISIONS (Nuclear physics), *TITANIUM, *NICKEL, *ZIRCONIUM, *NUCLEAR reactions, *NUCLEAR physics
Abstract

A stacked-foil method was used to study the cross section of the Ti(p,X)44Ti, Ni(p,X)56Ni and Zr(p,X)88Zr reactions with energies up to 30 MeV. Natural targets of Ti, Ni and Zr were irradiated with a 30 MeV proton beam and the products were measured by residual activity using a germanium hyper-pure detector with energy resolution better than 2 keV. Due to the low irradiation energy, the (p,t) is considered the dominant channel for the formation of the final product. A good agreement between our results and other published data was found in all cases. © 2005 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2005
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18. Trajectory of complex energies of three-atomic systems for large scattering lengths.

Author

Bringas, F., Yamashita, M. T., and Frederico, T.

Subjects
*NUCLEAR physics, *SCATTERING (Physics), *MATHEMATICAL physics, *PHYSICS
Abstract

Illustrates the trajectory of complex energies of three-atomic systems for large scattering lengths. Emergence of weakly bound Efimov states; Transformation of the excited Efimov state into a continuum resonance; Graph of the complete trajectory of Efimov states.

Published
2005
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19. More Than 50 Years of Successful Continuous Temperature Section Measurements by the Global Expendable Bathythermograph Network, Its Integrability, Societal Benefits, and Future

Author

Gustavo J. Goni, Janet Sprintall, Francis Bringas, Lijing Cheng, Mauro Cirano, Shenfu Dong, Ricardo Domingues, Marlos Goes, Hosmay Lopez, Rosemary Morrow, Ulises Rivero, Thomas Rossby, Robert E. Todd, Joaquin Trinanes, Nathalie Zilberman, Molly Baringer, Tim Boyer, Rebecca Cowley, Catia M. Domingues, Katherine Hutchinson, Martin Kramp, Mauricio M. Mata, Franco Reseghetti, Charles Sun, Udaya Bhaskar TVS, Denis Volkov, National Oceanic and Atmospheric Administration (NOAA), Scripps Institution of Oceanography (SIO), University of California [San Diego] (UC San Diego), University of California-University of California, Institute of Atmospheric Physics [Beijing] (IAP), Chinese Academy of Sciences [Beijing] (CAS), Instituto de Matemática da Universidade Federal do Rio de Janeiro (IM / UFRJ), Universidade Federal do Rio de Janeiro (UFRJ), Océan du Large et Variabilité Climatique (OLVAC), Laboratoire d'études en Géophysique et océanographie spatiales (LEGOS), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), Woods Hole Oceanographic Institution (WHOI), Institute for Marine and Antarctic Studies and Centre for Marine Socioecology, University of Tasmania [Hobart, Australia] (UTAS), Nucleus for European Modeling of the Ocean (NEMO R&D ), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Department of Oceanography [Cape Town], University of Cape Town, Universidade de Santiago de Compostela. Departamento de Electrónica e Computación, Goni, G. J., Sprintall, J., Bringas, F., Cheng, L., Cirano, M., Dong, S., Domingues, R., Goes, M., Lopez, H., Morrow, R., Rivero, U., Rossby, T., Todd, R. E., Trinanes, J., Zilberman, N., Baringer, M., Boyer, T., Cowley, R., Domingues, C. M., Hutchinson, K., Kramp, M., Mata, M. M., Reseghetti, F., Sun, C., Tvs, U. B., Volkov, D., Scripps Institution of Oceanography (SIO - UC San Diego), University of California (UC)-University of California (UC), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
0106 biological sciences, Subsurface current, 010504 meteorology & atmospheric sciences, lcsh:QH1-199.5, Subsurface currents, Ocean Engineering, [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph], Aquatic Science, lcsh:General. Including nature conservation, geographical distribution, Oceanography, 01 natural sciences, 7. Clean energy, Expendable bathythermograph, Sea level, 14. Life underwater, lcsh:Science, 0105 earth and related environmental sciences, Water Science and Technology, Global and Planetary Change, Expendable bathythermographs, Extreme weather, Surface currents, 010604 marine biology & hydrobiology, Ocean current, Mode (statistics), Boundary current, Current (stream), Ocean heat content, 13. Climate action, Climatology, Environmental science, lcsh:Q, Meridional heat transport, Bathythermograph
Abstract

The first eXpendable BathyThermographs (XBTs) were deployed in the 1960s in the North Atlantic Ocean. In 1967 XBTs were deployed in operational mode to provide a continuous record of temperature profile data along repeated transects, now known as the Global XBT Network. The current network is designed to monitor ocean circulation and boundary current variability, basin-wide and trans-basin ocean heat transport, and global and regional heat content. The ability of the XBT Network to systematically map the upper ocean thermal field in multiple basins with repeated trans-basin sections at eddy-resolving scales remains unmatched today and cannot be reproduced at present by any other observing platform. Some repeated XBT transects have now been continuously occupied for more than 30 years, providing an unprecedented long-term climate record of temperature, and geostrophic velocity profiles that are used to understand variability in ocean heat content (OHC), sea level change, and meridional ocean heat transport. Here, we present key scientific advances in understanding the changing ocean and climate system supported by XBT observations. Improvement in XBT data quality and its impact on computations, particularly of OHC, are presented. Technology development for probes, launchers, and transmission techniques are also discussed. Finally, we offer new perspectives for the future of the Global XBT Network GG, FB, SD, UR, MB, RD, and DV were supported by a grant from the NOAA/Ocean Observing and Monitoring Division (OOMD) and by NOAA's Atlantic Oceanographic and Meteorological Laboratory (AOML). The participation of JS and NZ in this study was supported by NOAA's Global Ocean Monitoring and Observing Program through Award NA15OAR4320071 and NSF Award 1542902. CD was funded by the Australian Research Council (FT130101532 and DP160103130); the Scientific Committee on Oceanic Research (SCOR) Working Group 148, funded by national SCOR committees and a grant to SCOR from the U.S. National Science Foundation (Grant OCE-1546580); and the Intergovernmental Oceanographic Commission of UNESCO/International Oceanographic Data and Information Exchange (IOC/IODE) IQuOD Steering Group. LC was supported by 2016YFC1401800 SI

Published
2019
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