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30 results on '"Rodriguez-Perez, Alberto"'

4. Role for Maternal Asthma in Severe Human Metapneumovirus Lung Disease Susceptibility in Children

Author

Libster, Romina Paula, Esteban, Ignacio, Bianchi, Alejandra Silvina, Alva Grimaldi, Luciano, Dueñas, Karina, Sancillo, Andrea, Rodriguez, Andrea, Ferrero, Fernando, Stein, Katherine, Acosta, Patricio Leandro, Ferolla, Fausto Martín, Bergel, Eduardo, Caballero, Mauricio Tomás, Polack, Fernando Pedro, Pellegrino, Gustavo, Fernandez Gago, Guadalupe, Pozzolo, Cecilia, Castro, Laura, Almeida, Rodrigo Egues, Rebec, Beatriz, González, Mariela, Calvo, Mariel, Henrichsen, Julieta, Nocito, Celina, Barbero, Guillermo, Ves Losada, Juan, Bonina, Angel, Flamenco, Edgardo, Rodriguez Perez, Alberto, Kobylarz, Alicia, Raggio, Mirta, Schavlosky, Graciela, Caria, Adriana, Barboza, Edgar, and Sastre, Gustavo

Subjects
maternal asthma, viruses, Argentina, CHILDREN, purl.org/becyt/ford/3.3 [https], Human metapneumovirus, children, Lower respiratory tract infection, medicine, Major Article, Immunology and Allergy, Humans, risk factors, Maternal asthma, Lung, Respiratory Tract Infections, Asthma, MATERNAL ASTHMA, Paramyxoviridae Infections, human metapneumovirus, biology, business.industry, HUMAN METAPNEUMOVIRUS, virus diseases, Infant, medicine.disease, biology.organism_classification, respiratory tract diseases, Infectious Diseases, BURDEN OF ILLNESS, Lung disease, Child, Preschool, LOWER RESPIRATORY TRACT INFECTION, RISK FACTORS, Immunology, burden of illness, lower respiratory tract infection, purl.org/becyt/ford/3 [https], Disease Susceptibility, Metapneumovirus, business
Abstract

Background Severity of human metapneumovirus (hMPV) lower respiratory illness (LRTI) is considered similar to that observed for respiratory syncytial virus (RSV). However, differences in severity between these pathogens have been noted, suggesting the degree of illness may vary in different populations. Moreover, a potential association between hMPV and asthma also suggests that hMPV may preferentially affect asthmatic subjects. Methods In a population-based surveillance study in children aged, In a population-based surveillance study in children aged

Published
2021

5. Characterization of Respiratory Syncytial Virus Strains in the Greater Buenos Aires and Spreading Aspects

Author

Castello, Alejandro Andrés, Rodriguez Perez, Alberto, Rojo, Gabriel Lihue, Alvarez, Daniela, Musto, Alejandra, Montali, César, Sancillo, Andrea, Hamilton, Gabriela, Garcia, Carolina, Sosa, Liliana del Valle, Orellana, Mariana Laura, and Viegas, Mariana

Subjects
Virus Sincitial Respiratorio, purl.org/becyt/ford/3.3 [https], CIENCIAS MÉDICAS Y DE LA SALUD, Ciencias de la Salud, purl.org/becyt/ford/3 [https], Salud Pública y Medioambiental, Vulnerabilidad, Genotipo, Epidemiología Molecular, Infección Respiratoria Aguda Baja
Abstract

El virus sincitial respiratorio (VSR) es el agente viral más frecuente de infecciones respiratorias agudas bajas (IRAB) en la primera infancia y el mayor responsable de las hospitalizaciones en el período invernal. OBJETIVOS: Describir las características de los brotes de VSR en la Zona Sanitaria VI de la provincia de Buenos Aires, establecer la diversidad de las cepas circulantes y realizar el análisis bioinformático y filogeográfico de las secuencias de la glicoproteína G. MÉTODOS: Se estudió a pacientes pediátricos internados con presentación compatible con IRAB durante dos picos epidémicos (2014-2015) en cuatro hospitales. Se recopilaron datos clínicos, demográficos y socio-sanitarios, y se detectaron patógenos virales en aspirados nasofaríngeos de estos pacientes por inmunofluorescencia (IF), obteniéndose la secuencia del gen de la proteína G en los VSR positivos. RESULTADOS: De 1296 casos estudiados, 317 fueron positivos para algún agente viral. De ellos, 266 (84%) fueron VSR positivos. Se hallaron asociaciones significativas entre las poblaciones positivas y negativas para VSR. Una tendencia al hacinamiento y vivienda precaria en los casos VSR positivos fue reflejada en los estudios filogeográficos The respiratory syncytial virus (RSV) is the most frequent viral agent associated to acute lower respiratory infections (ALRIs) in early childhood, being the main responsible for hospitalizations during winter. OBJECTIVES: To describe the characteristics of RSV outbreaks in the Health Area VI of Buenos Aires Province, to establish the diversity of circulating strains and to perform a bioinformatic and phylogeographic analysis of glycoprotein G sequences. METHODS: Pediatric inpatients with ALRI-compatible x|presentation during two epidemic peaks (2014-2015) were studied in four hospitals. Clinical, demographic and socio-sanitary data were collected, viral pathogens were detected by immunofluorescence (IF), and the sequence of the G protein gene was obtained in the positive RSVs. RESULTS: From 1296 cases, 317 were positive for some viral agent and 266 (84%) out of these were RSV positive. Significant associations were found among the positive and negative populations for RSV. A trend towards overcrowding and precarious housing in positive RSV cases was reflected in phylogeographic studies Fil: Castello, Alejandro Andrés. Universidad Nacional Arturo Jauretche; Argentina. Universidad Nacional de Quilmes; Argentina Fil: Rodriguez Perez, Alberto. Hospital Dr. Alberto Eurnekian; Argentina Fil: Rojo, Gabriel Lihue. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Gobierno de la Ciudad de Buenos Aires. Hospital General de Niños "Ricardo Gutiérrez". Laboratorio de Virología; Argentina Fil: Alvarez, Daniela. Universidad Nacional Arturo Jauretche; Argentina Fil: Musto, Alejandra. Universidad Nacional Arturo Jauretche; Argentina Fil: Montali, César. Provincia de Buenos Aires. Ministerio de Salud. Hospital Alta Complejidad en Red El Cruce Dr. Néstor Carlos Kirchner Samic; Argentina Fil: Sancillo, Andrea. Provincia de Buenos Aires. Ministerio de Salud. Hospital Alta Complejidad en Red El Cruce Dr. Néstor Carlos Kirchner Samic; Argentina Fil: Hamilton, Gabriela. Universidad Nacional Arturo Jauretche; Argentina Fil: Garcia, Carolina. Hospital Evita Pueblo; Argentina Fil: Sosa, Liliana del Valle. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones en Ciencias de la Salud. Universidad Nacional de Córdoba. Instituto de Investigaciones en Ciencias de la Salud; Argentina Fil: Orellana, Mariana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Quilmes; Argentina. Universidad Nacional Arturo Jauretche; Argentina Fil: Viegas, Mariana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Gobierno de la Ciudad de Buenos Aires. Hospital General de Niños "Ricardo Gutiérrez". Laboratorio de Virología; Argentina

Published
2017

6. No Change in Lower Limb Extension Power during a Hospital Stay in Geriatric Patients, Despite Improved Functional Level

Author

Karlsen, Anders, Loeb, Mads Rohde, Turtumoeygard, Ida Fanny, Scheel, Frederik Ulrik, Andersen, Kristine Bramsen, Joergensen, Katrine Jeong, Rodriguez Perez, Alberto Luis, Kjaer, Michael, Beyer, Nina, Karlsen, Anders, Loeb, Mads Rohde, Turtumoeygard, Ida Fanny, Scheel, Frederik Ulrik, Andersen, Kristine Bramsen, Joergensen, Katrine Jeong, Rodriguez Perez, Alberto Luis, Kjaer, Michael, and Beyer, Nina

Published
2017

8. Unravelling respiratory syncytial virus outbreaks in Buenos Aires, Argentina: Molecular basis of the spatio-temporal transmission

Author

Rojo, Gabriel Lihue, primary, Goya, Stephanie, additional, Orellana, Mariana, additional, Sancilio, Andrea, additional, Rodriguez Perez, Alberto, additional, Montali, César, additional, García, Carolina, additional, Sosa, Lilian, additional, Musto, Alejandra, additional, Alvarez, Daniela, additional, Castello, Alejandro, additional, and Viegas, Mariana, additional

Published
2017
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15. An ultra low-power mixed-signal back-end for passive sensor UHF RFID transponders

Author

Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. EPIC - Energy Processing and Integrated Circuits, Rodriguez, J., Delgado Restituto, M., Masuch, J., Rodriguez Perez, Alberto, Alarcón Cot, Eduardo José, Rodríguez Vázquez, Ángel, Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica, Universitat Politècnica de Catalunya. EPIC - Energy Processing and Integrated Circuits, Rodriguez, J., Delgado Restituto, M., Masuch, J., Rodriguez Perez, Alberto, Alarcón Cot, Eduardo José, and Rodríguez Vázquez, Ángel

Abstract

This paper describes the design of mixed-signal back end for an ultrahigh-frequency sensor-enabled radio-frequency identification transponder in full compliance with the Electronic Product Code Class-1 Generation-2 protocol, defined in the standard ISO 18000-6C. The chip, implemented in a low-cost 0.35- μm CMOS technology process, includes a baseband processor, an analog-to-digital converter (ADC) to digitize the signal acquired from the external sensor, and some auxiliary circuitry for voltage regulation and reference generation. The proposed solution uses two different supply voltages, one for the processor and the other for the mixed-signal circuitry, and defines a novel communication protocol between both blocks so that analog readouts are minimally affected by the digital activity of the tag. The whole system was first functionally validated by exhaustively testing with external dc power supplies ten prototype samples, and then, the two main blocks, processor, and ADC were individually tested to assess their performance limits. Regarding the baseband processor, experiments were performed toward the calculation of its packet error rate (PER) under two typical biasing configurations of passive tags, using either crude clamps or regulators. It was found that the regulated biasing outperforms the clamping solution and obtains a PER of 3 × 10-3 with a supply voltage of 0.75 V. The current consumption of the processor during the reception and response to a Read command at maximum backward rate is only 2.2 μA from a 0.9-V supply. Regarding the ADC, it is a 10-b successive approximation register converter which obtains 9.41 b of effective resolution at 2-kS/s sampling frequency with a power consumption of 250 nW, including the dissipation of a current generation cell and the clock generation circuitry, from 1-V supply., Peer Reviewed, Postprint (published version)

Published
2012

20. Contributors

Author

Basak, Abhishek, Bhadra, Niloy, Bhunia, Swarup, Damaser, Margot S., Delgado-Restituto, Manuel, Durand, Dominique M., Dweiri, Yazan, Ferry, Elizabeth K., Fletter, Paul C., Gad, Bishoy, Ghovanloo, Maysam, Hess-Dunning, Allison, Hoffman, Grant, Jha, Niraj K., Kim, Younghyun, Ko, Wen, Lachhman, Shem, Lee, Hyung-Min, Lee, Woosuk, Majerus, Steve J.A., Makovey, Iryna, Mendez, Arnaldo, Raghunathan, Anand, Raghunathan, Vijay, Rodríguez-Pérez, Alberto, Sawan, Mohamad, Scherer, Randy, Vrabec, Tina, Wang, Peng, Wodlinger, Brian, Young, Darrin J., Zhu, Hui, and Zorman, Christian A.

Published
2015
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28. The experience of starting-up a radiation test at the 18MeV cyclotron in the Spanish National Accelerators Center

Author

Tombs, Jonathan, primary, Aguirre, Miguel A., additional, Palomo, Rogelio, additional, Mogollon, Juan M., additional, Guzman, Hipolito, additional, Napoles, Javier, additional, Rodriguez-Perez, Alberto, additional, Rodriguez, Jose A., additional, Vega-Leal, Alfredo P., additional, Morillas, Yolanda, additional, and Garcia, Javier, additional

Published
2007
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29. A 64-channel inductively-powered neural recording sensor array.

Author

Rodriguez-Perez, Alberto, Masuch, Jens, Rodriguez-Rodriguez, Jose A., Delgado-Restituto, Manuel, and Rodriguez-Vazquez, Angel

Abstract

This paper reports a 64-channel inductively powered neural recording sensor array. Neural signals are acquired, filtered, digitized and compressed in the channels. Additionally, each channel implements a local auto-calibration mechanism which configures the transfer characteristics of the recording site. The system has two operation modes; in one case the information captured by the channels is sent as uncompressed raw data; in the other, feature vectors extracted from the detected neural spikes are transmitted. Data streams coming from the channels are serialized by an embedded digital processor and transferred to the outside by means of the same inductive link used for powering the system. Simulation results show that the power consumption of the complete system is 377µW. [ABSTRACT FROM PUBLISHER]

Published
2012
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30. An Ultralow-Power Mixed-Signal Back End for Passive Sensor UHF RFID Transponders.

Author

Rodriguez-Rodriguez, José A., Delgado-Restituto, Manuel, Masuch, Jens, Rodriguez-Perez, Alberto, Alarcon, Eduard, and Rodriguez-Vazquez, Ángel

Subjects
RADIO frequency identification systems, COMPLEMENTARY metal oxide semiconductors, ANALOG-to-digital converters, ELECTRIC circuits, PERFORMANCE evaluation, ELECTRIC generators, ENERGY dissipation, ENERGY consumption
Abstract

This paper describes the design of mixed-signal back end for an ultrahigh-frequency sensor-enabled radio-frequency identification transponder in full compliance with the Electronic Product Code Class-1 Generation-2 protocol, defined in the standard ISO 18000-6C. The chip, implemented in a low-cost 0.35- \mu\m CMOS technology process, includes a baseband processor, an analog-to-digital converter (ADC) to digitize the signal acquired from the external sensor, and some auxiliary circuitry for voltage regulation and reference generation. The proposed solution uses two different supply voltages, one for the processor and the other for the mixed-signal circuitry, and defines a novel communication protocol between both blocks so that analog readouts are minimally affected by the digital activity of the tag. The whole system was first functionally validated by exhaustively testing with external dc power supplies ten prototype samples, and then, the two main blocks, processor, and ADC were individually tested to assess their performance limits. Regarding the baseband processor, experiments were performed toward the calculation of its packet error rate (PER) under two typical biasing configurations of passive tags, using either crude clamps or regulators. It was found that the regulated biasing outperforms the clamping solution and obtains a PER of 3 \times 10^-3 with a supply voltage of 0.75 V. The current consumption of the processor during the reception and response to a Read command at maximum backward rate is only 2.2 \mu\A from a 0.9-V supply. Regarding the ADC, it is a 10-b successive approximation register converter which obtains 9.41 b of effective resolution at 2-kS/s sampling frequency with a power consumption of 250 nW, including the dissipation of a current generation cell and the clock generation circuitry, from 1-V supply. [ABSTRACT FROM PUBLISHER]

Published
2011
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