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Your search keyword '"Perez Lopez, Carlos"' showing total 103 results
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103 results on '"Perez Lopez, Carlos"'

2. Early cortical atrophy in REM sleep behavior disorder

Author

Abenza Abildua, María José, Lanz Santos, Elvira, Moreno Domínguez, Luis, Mata Álvarez-Santullano, Marina, Borrue Fernández, Carmen, Palmí Cortés, Itziar, Lobato Rodríguez, Ricardo, Navacerrada Barrero, Francisco José, Martínez Ubierna, Sonia, Gómez Aceña A, Ángeles, Suárez Gisbert, Eugenio, Lores Gutiérrez, Vanesa, Gómez de la Riva, Álvaro, Pérez López, Carlos, and Novo Aparicio, Susana

Published
2024
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3. Atrofia cortical precoz en el trastorno de conducta del sueño REM

Author

Abenza Abildua, María José, Lanz Santos, Elvira, Moreno Domínguez, Luis, Mata Álvarez-Santullano, Marina, Borrue Fernández, Carmen, Palmí Cortés, Itziar, Lobato Rodríguez, Ricardo, Navacerrada Barrero, Francisco José, Martínez Ubierna, Sonia, Gómez Aceña A, Ángeles, Suárez Gisbert, Eugenio, Lores Gutiérrez, Vanesa, Gómez de la Riva, Álvaro, Pérez López, Carlos, and Novo Aparicio, Susana

Published
2024
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4. Data Analysis and Generation in the ENVELLINT Longitudinal Study to Determine Loss of Functionality in Elderly People

Author

Nelson, John, Ollé, Jordi, Parra, Xavier, Pérez-López, Carlos, Macho-Pérez, Oscar, Arroyo-Huidobro, Marta, Català, Andreu, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Rojas, Ignacio, editor, Joya, Gonzalo, editor, and Catala, Andreu, editor

Published
2023
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11. Deep Learning for Detecting Freezing of Gait Episodes in Parkinson’s Disease Based on Accelerometers

Author

Camps, Julià, Samà, Albert, Martín, Mario, Rodríguez-Martín, Daniel, Pérez-López, Carlos, Alcaine, Sheila, Mestre, Berta, Prats, Anna, Crespo, M. Cruz, Cabestany, Joan, Bayés, Àngels, Català, Andreu, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Rojas, Ignacio, editor, Joya, Gonzalo, editor, and Catala, Andreu, editor

Published
2017
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12. Posture Transitions Identification Based on a Triaxial Accelerometer and a Barometer Sensor

Author

Rodríguez-Martín, Daniel, Samà, Albert, Pérez-López, Carlos, Català, Andreu, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Rojas, Ignacio, editor, Joya, Gonzalo, editor, and Catala, Andreu, editor

Published
2017
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15. Monitoring Motor Fluctuations in Parkinson’s Disease Using a Waist-Worn Inertial Sensor

Author

Pérez-López, Carlos, Samà, Albert, Rodríguez-Martín, Daniel, Català, Andreu, Cabestany, Joan, de Mingo, Eva, Rodríguez-Molinero, Alejandro, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Rojas, Ignacio, editor, Joya, Gonzalo, editor, and Catala, Andreu, editor

Published
2015
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28. Encephalopathy in severe SARS-CoV2 infection: Inflammatory or infectious?

Author

Abenza-Abildúa, María José, Novo-Aparicio, Susana, Moreno-Zabaleta, Raúl, Algarra-Lucas, Maria Carmen, Rojo Moreno-Arcones, Blas, Salvador-Maya, Miguel Ángel, Navacerrada-Barrero, Francisco José, Ojeda-Ruíz de Luna, Joaquín, Pérez-López, Carlos, Fraile-Vicente, José María, Suárez-García, Inés, Suarez-Gisbert, Eugenio, Palacios-Castaño, Juan Antonio, and Ramirez-Prieto, María Teresa

Published
2020
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30. Detection of surface strain by three-dimensional digital holography

Author

De la Torre-Ibarra, Manuel, Mendoza-Santoyo, Fernando, Perez-Lopez, Carlos, and Saucedo-A, Tonatiuh

Subjects
Holography -- Research, Optics -- Research, Astronomy, Physics
Abstract

Three-dimensional digital holography with three object-illuminating beams has been successfully used for the detection of surface strain in metallic objects. The optical setup that uses illuminating beams to irradiate the object from three directions means that all three object surface displacement components, x, y, and z, can be independently calculated and used to find the strain gradients on the surface. The results show the conversion of the complete surface displacement field into a surface strain field. The method is capable of measuring microstrains for out-of-plane surface displacements of less than 10 [micro]m. OCIS codes: 090.2880, 120.4290, 120.6160.

Published
2005

34. Transient deformation measurement with electronic speckle pattern interferometry by use of a holographic optical element for spatial phase stepping

Author

Garcia, Bernardino Barrientos, Moore, Andrew J., Perez-Lopez, Carlos, Wang, Lingli, and Tschudi, Theo

Subjects
Holography -- Usage, Interferometry -- Usage, Laser speckle -- Usage, Astronomy, Physics
Abstract

We have used a computer-generated holographic optical element (HOE) with electronic speckle pattern interferometry to calculate the interference phase corresponding to the deformation of a test object from a single TV frame. The HOE is a modified crossed phase grating that introduces a known phase change between the +/- 1 diffracted orders, without being translated. The progressive propagation of transient mechanical waves was measured with an rms precision of 2(pi)/30.

Published
1999

35. Transient deformation analysis by a carrier method of pulsed electronic speckle-shearing pattern interferometry

Author

Davila, Abundio, Kaufmann, Guillermo H., and Perez-Lopez, Carlos

Subjects
Lasers -- Research, Interferometers -- Research, Deformations (Mechanics) -- Measurement, Astronomy, Physics
Abstract

The introduction of a pulsed laser into an electronic speckle-shearing pattern interferometer allows high-speed transient deformations to be measured. We report on a computerized system that permits automatic data reduction by introducing carrier fringes through the translation of a diverging lens. The quantitative determination of the phase map that is due to deformation is carried out by the spatial synchronous detection method. Experimental results obtained for a metal plate transiently deformed by an electromagnetic hammer illustrate the advantages of the proposed system. of America

Published
1998

45. Introduction

Author

Broca, Sebastien, Perez Lopez, Carlos, Berdet, Marc, and Shtalbi, Haki

Subjects
[SHS] Humanities and Social Sciences, ComputingMilieux_MISCELLANEOUS, [SHS.INFO] Humanities and Social Sciences/Library and information sciences
Published
2016

46. Utopia: The Elsewhere and the Otherwise

Author

Broca, Sebastien, Perez Lopez, Carlos, Berdet, Marc, Centre d'études sur les médias, les technologies et l'internationalisation (CEMTI), and Université Paris 8 Vincennes-Saint-Denis (UP8)

Subjects
[SHS.INFO]Humanities and Social Sciences/Library and information sciences, ComputingMilieux_MISCELLANEOUS, [SHS]Humanities and Social Sciences
Abstract

International audience

Published
2016

48. Pulsed digital holographic interferometry for dynamic measurement of rotating objects with an optical derotator

Author

Perez-Lopez, Carlos, Santoyo, Fernando Mendoza, Pedrini, Giancarlo, Schedin, Staffan, and Tiziani, Hans J.

Subjects
Optics -- Research, Holographic interferometry -- Usage, Rotational motion -- Analysis, Deformations (Mechanics) -- Analysis, Astronomy, Physics
Abstract

A method for measuring dynamic deformations of rotating objects with pulsed digital holography is described. An optical derotator is used to compensate for the rotation. A CCD camera is used to record two holograms with a short time separation (20 [micro] s). Results of deformations between the recordings are obtained after subtraction of the phase distribution between the two digital holograms. Fringe phase maps of the phase subtraction of two holograms compensated by the derotator and recorded with a Q-switched double-pulsed ruby laser are presented. A flat disk and the blades of a fan were investigated. We used an optical arrangement that allowed us to improve laser illumination and energy efficiency. Experimental results on quantitative evaluation of dynamical out-of-plane deformations are presented. OCIS codes: 120.2880, 120.3940, 120.4630.

Published
2001

50. Vibration measurements by pulsed digital holographic endoscopy

Author

Schedin, Staffan, Pedrini, Giancarlo, Perez-Lopez, Carlos, Mendoza Santoyo, Fernando, Schedin, Staffan, Pedrini, Giancarlo, Perez-Lopez, Carlos, and Mendoza Santoyo, Fernando

Abstract

Digital holographic interferometry in combination with a flexible fiber endoscope allows high precision measurements of deformations on hidden objects surfaces, inside cavities and objects with small access apertures. A digital holographic endoscopy system is described with a frequency-doubled, twin oscillator Q-switched pulsed Nd:YAG laser as light source. A sequence of digital hologram pairs are recorded with a maximum repetition rate of 260 ms. Each digital hologram is captured at separate video frames of a CCD-camera. The time separation between the laser pulses from each cavity can be set in the range from 50 to 500 mu s. The digital holograms are transferred to a PC via a frame grabber and evaluated quantitatively by the Fourier transform method. The resulting phase fringe pattern has the information needed to evaluate quantitatively the amount of the deformation. Experimental results of vibration measurements of hidden mechanical and biological object surfaces are presented. The quality of the results obtained by mechanical object surfaces is usually higher than for biological surfaces. This can be explained easily by the fact that a biological surface is much more complex than a mechanical surface in the sense that some parts of the surface may reflect the light well whereas other parts may absorb the light. Also, biological surfaces are translucent, which means that part of the light may enter inside the sample where it may be absorbed or reflected.

Published
2005
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