Browsing by Title
Now showing items 5173-5192 of 6151
-
Qlub Bit : cortos animados por Internet
(Verónica Anahí Cortés RamosClaudia Elena Pedrozo MachorroNarendra Sashi Sánchez Téllez, 2012)Qlub Bit es un proyecto por Internet en el que se busca transmitir valores a los más pequeños a través de videos animados de corta duración. La tecnología nos permite llegar a ellos por éste medio con pequeñas y divertidas ... -
Quadratic boost converter based on stackable switching stages
(Institution of Engineering and Technology, 2018-07-10)The authors propose a novel step-up converter with stackable switching stages that is suitable for renewable energy applications. On the one hand, the converter gain corresponds to that of the traditional quadratic boost ... -
Quadratic boost converter with low-output-voltage ripple
(Institution of Engineering and Technology, 2020)This study proposes a non-isolated quadratic boost converter (QBC) that features a low-output-voltage ripple with respect to traditional QBCs. This advantage is in contrast with other topologies that require a higher amount ... -
Quadratic buck-boost converter with positive output voltage and continuous input current for PEMFC systems
(Elsevier Ltd, 2017-12)Electrical power processing is an essential component of proton exchange membrane fuel cell (PEMFC or simply FC) conversion systems. The first stage of power conditioning usually consists of a DC–DC converter that enables ... -
Quadratic buck-boost converter with positive output-voltage and continuous input-current
(2018)Electrical power processing is an essential component of renewable energy sources such as PV panels and fuel cells conversion systems. The first stage of power conditioning usually consists of a DC-DC converter that enables ... -
Quadratic buck-boost converter with positive output-voltage and minimum ripple point design
(Institution of Engineering and Technology, 2018-06-20)This study presents a novel topology of a buck-boost converter that features: (i) quadratic voltage gain; (ii) positive output voltage with respect to the input; (iii) continuous input current. Moreover, as the main ... -
Quadratic buck-boost converter with reduced input current ripple and wide conversion range
(Institution of Engineering and Technology, 2019-12)This study introduces an advanced DC-DC power converter with two main objectives, (i) to achieve a wide range of voltage gain, which means the converter may work over a wide range of input voltage for a fixed desired output ... -
Quadratic Buck-Boost Converter with Zero Output Voltage Ripple at a Selectable Operating Point
(IEEE, 2019)We introduce a new dc-dc converter topology with the following features: first, quadratic voltage gain, which allows the converter to work over a wide voltage range with a minimal variation of duty cycle and without the ... -
Quadratic gain converter with output voltage ripple mitigation
(IEEE Energy Conversion Congress and Exposition, 2018-11-03)This paper introduces a DC-DC converter topology with the following features: (i) quadratic voltage gain, which allows the converter to work with wide voltage line variations in a wide operation voltage range with a minimal ... -
Quadrotor real-time simulation: a temporary computational complexity-based approach
(MDPI, 2022-06)The interaction of digital systems with dynamic systems requires synchrony and the accomplishment of time constrains, so the simulation of physical processes needs an implementation by means of real-time systems (RTS). ... -
A qualitative look at test anxiety and english language proficiency tests
(Common Ground Research Networks, 2020-10-07)Test anxiety is an emotional response to a testing situation. This article reports on the qualitative aspects of a study carried out at a Mexican university. Students are required to complete an English language proficiency ... -
Quantification of the spectral coupling of atmosphere and photovoltaic system performance : Indexes, methods and impact on energy harvesting
(2017)Photovoltaic system performance is affected by changes in the input sunlight spectrum. Moreover, the different photovoltaic materials employed show different spectral responses, having different spectral behaviour as a ... -
Quantum-behaved bat algorithm for solving the economic load dispatch problem considering a valve-point effect
(IGI Global, 2020)Quantum computing-inspired metaheuristic algorithms have emerged as a powerful computational tool to solve nonlinear optimization problems. In this paper, a quantum-behaved bat algorithm (QBA) is implemented to solve a ... -
Querela inofficiosi testamenti : medio de impugnación del testamento en el derecho romano
(Norma Xóchitl Di Censo García, 2012)A través de algunos testimonios extraídos de fuentes jurídicas así como otros derivados de fuentes literarias, descubrimos la maravillosa construcción científica de la jurisprudencia romana, que crea la institución de la ... -
¿Qué es cognitivo en la metáfora según Aristóteles?
(Imprensa da Universidade de Coimbra, 2020)In the Poetics (21 1457b6 f.), Aristotle, defines metaphor as the transfer (epiphora) of a term from a given, foreign (allotrios) domain to another one. If, as does the classical doctrine of tropes, we consider that it ... -
¿Qué es la justicia? : una revisión del argumento kelseniano de la relación entre moral y derecho
(Universidad Panamericana. Facultad de Derecho, 2005)La pregunta sobre si todo lo moralmente bueno debe ser jurídicamente obligatorio y todo lo moralmente malo debe estar jurídicamente prohibido, está relacionada tanto con una añeja discusión teórica, como con el hoy acuciante ... -
¿Qué es un dilema en bioética?
(Colegio Mexicano de Anestesiología A.C., 2019)Introducción: Basta abrir una página de internet, ver un noticiero, oír el radio o estar en cualquier reunión para encontrarnos con este tipo de noticias: «Se producen los primeros bebés modificados genéticamente», «se ... -
¿Qué significa el "Estado laico" hoy, en México
(2008)I. ¿Es o debe ser el Estado laico un principio constitucional? II. Estado laico y nación religiosa. III. ¿Puede haber un ética laica? -
¿Qué valoran más los estudiantes de sus profesores? Un análisis a partir de cuestionarios de opinión de evaluación de la docencia
(Universidad Panamericana, Escuela de Pedagogía, 2016-11-14)El presente estudio busca realizar un aporte metodológico en la construcción y el análisis de cuestionarios de opinión de estudiantes para la evaluación de la docencia. Se realizó un ejercicio de elabo-ración y validación ... -
¿Quiénes pueden iniciar un procedimiento de revisión ante un panel binacional de acuerdo con el capítulo XIX del TLC?
(Universidad Panamericana. Facultad de Derecho, 1996)Derecho a iniciar la revisión ante el panel binacional y a presentar escritos de reclamación. El procedimiento del capítulo XIX es un procedimiento entre Estados.