Wilmer Rodríguez recibió una corrección en el segundo corte de su desempeño académico. El documento proporciona información sobre una corrección al rendimiento de Wilmer Rodríguez en un período determinado de evaluación.
La nube informática es una red de usuarios donde varias computadoras se unen y comparten recursos. Para usar la nube informática se requiere una conexión de fibra óptica de alta velocidad. La nube informática tiene ventajas como no necesitar personal de mantenimiento, pero también inconvenientes como requerir una conexión a Internet constante para poder acceder a los recursos compartidos.
El documento describe la escasez de papel higiénico en Venezuela, con imágenes de venezolanos comprando grandes cantidades del producto en los supermercados. Entrevistas a compradores expresan tristeza y horror por la situación, indicando que Venezuela siempre fue un país rico pero ahora enfrenta dificultades para acceder a bienes básicos. El gobierno culpa a fuerzas anti-gubernamentales por la escasez y anuncia importaciones para hacer frente al problema, mientras que empresarios ven los controles de precios como la causa subyac
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against developing mental illness and improve symptoms for those who already suffer from conditions like anxiety and depression.
Este seminario trata sobre la lectura crítica de un artículo científico sobre la aparición de hematomas asociados a la extracción de sangre venosa mediante vacío. El objetivo del artículo es determinar la influencia del sistema de vacío en la aparición de hematomas. La conclusión es que el sistema de extracción de vacío no aumenta significativamente los niveles de hematomas.
Este documento describe las características generales del desarrollo de niños de 0 a 6 años en las áreas psicomotriz, socioemocional, cognitiva y del lenguaje. También discute las responsabilidades educativas compartidas entre la familia y la escuela en las primeras etapas, así como factores que influyen en el rendimiento escolar. El documento proporciona una guía sobre el desarrollo infantil temprano y las implicaciones educativas.
La nube informática es una red de usuarios donde varias computadoras se unen y comparten recursos. Para usar la nube informática se requiere una conexión de fibra óptica de alta velocidad. La nube informática tiene ventajas como no necesitar personal de mantenimiento, pero también inconvenientes como requerir una conexión a Internet constante para poder acceder a los recursos compartidos.
El documento describe la escasez de papel higiénico en Venezuela, con imágenes de venezolanos comprando grandes cantidades del producto en los supermercados. Entrevistas a compradores expresan tristeza y horror por la situación, indicando que Venezuela siempre fue un país rico pero ahora enfrenta dificultades para acceder a bienes básicos. El gobierno culpa a fuerzas anti-gubernamentales por la escasez y anuncia importaciones para hacer frente al problema, mientras que empresarios ven los controles de precios como la causa subyac
The document discusses the benefits of exercise for mental health. Regular physical activity can help reduce anxiety and depression and improve mood and cognitive function. Exercise causes chemical changes in the brain that may help protect against developing mental illness and improve symptoms for those who already suffer from conditions like anxiety and depression.
Este seminario trata sobre la lectura crítica de un artículo científico sobre la aparición de hematomas asociados a la extracción de sangre venosa mediante vacío. El objetivo del artículo es determinar la influencia del sistema de vacío en la aparición de hematomas. La conclusión es que el sistema de extracción de vacío no aumenta significativamente los niveles de hematomas.
Este documento describe las características generales del desarrollo de niños de 0 a 6 años en las áreas psicomotriz, socioemocional, cognitiva y del lenguaje. También discute las responsabilidades educativas compartidas entre la familia y la escuela en las primeras etapas, así como factores que influyen en el rendimiento escolar. El documento proporciona una guía sobre el desarrollo infantil temprano y las implicaciones educativas.
El documento describe la anatomía y ecografía de la mama. La mama está formada principalmente por tejido glandular y adiposo, y está separada de los músculos por la aponeurosis profunda. La ecografía mamaria permite caracterizar nódulos como sólidos o quísticos y complementa a la mamografía. La técnica ecográfica evalúa la mama y axilas para detectar lesiones, y la estructura de la mama varía con la edad y etapas reproductivas de la mujer.
This document discusses good and bad design in presentations. It provides some rules for identifying good and bad design, such as whether the slide organization, information structure, and readability are functional and attention-grabbing. Examples of good design principles mentioned include simplicity, quality images, appropriate fonts, color matching, and effective word choice. The document then provides links to several example slides demonstrating good and bad design.
This document describes a memristor device using a heterojunction of silver nanoparticles and aluminum oxide for resistive switching applications. The device consists of an aluminum-aluminum oxide-silver nanoparticles-aluminum structure. Current-voltage measurements show a transition between two states, with a resistance ratio of 105 for the major transition and a ratio of 101 for the minor transition. Scanning electron microscopy images confirm the growth of a thin aluminum oxide film consisting of spherical nanoparticles approximately 40nm in size on an aluminum substrate. This memristor operates at low voltages and shows potential for non-volatile resistive random access memory.
This document presents a scalable method for image classification using sparse coding and dictionary learning. It proposes parallelizing the computation of image similarity for faster recognition. Specifically, it distributes the task of measuring similarity between images among multiple cores in a cluster. Experimental results on a face recognition dataset show nearly linear speedup when balancing the dataset size and number of nodes. Reconstruction errors are used as a similarity measure, with dictionaries learned using K-SVD for each image. The proposed parallel method distributes this similarity computation process to achieve faster image classification.
This document describes a VSC-HVDC transmission system connecting a strong AC system to a weak island AC system. It investigates the AC filter requirements and designs controllers for the VSC using optimal techniques. The controllers designed are a active power controller for the rectifier, reactive power controller for the rectifier, DC voltage controller for the inverter, and AC voltage controller for the inverter. Simulations are performed in MATLAB to analyze the system's performance for load variations in the island system.
This document provides a review of analytical modeling and designing of high-speed voltage differencing transconductance amplifier (VDTA)-based multiple input multiple output (MIMO) filters. It discusses MIMO filters and their realization as multiple input single output (MISO) or single input multiple output (SIMO) configurations. MISO configurations are preferred as they can reduce the number of active elements needed for circuit realization. The document then reviews several previous works on designing universal filters using active elements like VDTA. It provides details on the basic concept of VDTA, including its construction, working principle and advantages. Finally, the document proposes designing an electronically tunable universal MIMO filter using VDTA as the active element
The document discusses hiding confidential text data within an encrypted image using reversible data hiding techniques. It begins by introducing the concepts of reversible data hiding and meaningful image encryption. The proposed method first encrypts an original image using AES to create a pre-encrypted image. It then applies discrete wavelet transform to the pre-encrypted image to transform it into a visually meaningful encrypted image. Finally, reversible data hiding is used to hide confidential text data within the meaningful encrypted image while still allowing lossless retrieval of both the image and hidden data. The method aims to provide effective data protection with low computational cost.
This document describes a proposed integrated power electronics interface (IPEI) for battery electric vehicles (BEVs). The IPEI is designed to optimize power flow management for different operating modes like charging/discharging and traction/braking. It integrates a DC/DC converter, onboard battery charger, and DC/AC inverter to improve system efficiency and reliability while reducing component size and costs compared to other topologies. The document discusses the circuit design of the IPEI and its four operating modes. It also provides the dynamic modeling of the electric power train components like the battery and electric motor, as well as the control strategy design for the IPEI, which is analyzed using MATLAB/Simulink simulations.
The document describes the Xerox Color 800i/1000i presses. It highlights their ability to produce vibrant images with a wide color gamut across a range of media weights and sizes. It discusses the presses' digitally mastered image quality, productivity speeds of 80-100 pages per minute, and industry-leading availability. The document provides details on the presses' dry ink technology, color management, and automation features like the full width array sensor that help maintain accurate and consistent color over time.
This document provides an analytical review of algorithms that control congestion in vehicular networks (VANETs). It begins with an introduction to VANETs and the issues they face with congestion due to frequent broadcasting of safety and non-safety messages. It then discusses several proposed congestion control algorithms for VANETs, including a utility-based approach that encodes utility information in packets to prioritize them. The document analyzes the characteristics of different hop-by-hop congestion control approaches and highlights their advantages over end-to-end approaches for VANETs. Finally, it provides a comparison of various proposed algorithms for VANET congestion control.
AC M4 Ficha de trabalho 5 -bastidores e cablagem estruturadafilipereira
Este documento descreve bastidores e cablagem estruturada para redes locais, incluindo seus componentes principais como bastidores, cabos de rede e conectores, com imagens e preços de referência. A tarefa pede um relatório detalhando estas características e componentes com base em um manual e pesquisa online.
This document discusses a technique for detecting copy-paste or cut-paste digital image forgeries. The technique uses wavelet decomposition to decompose the input image into sub-bands, including low-low, low-high, high-low, and high-high. Edge detection is then performed to extract edges. The cut-paste or copy-paste region is identified by examining edge pixels in the wavelet domain, as this region is normally rectangular or square. Parameters like entropy, power energy, and standard deviation are compared between the input image and suspected forged images to detect forgeries. The technique was tested on images with copy-pasted areas and could accurately identify the forged regions.
This document discusses the implementation of instantaneous reactive power theory (IRP theory) for current harmonic reduction and reactive power compensation in three phase four wire power systems. IRP theory is used to calculate reference compensating currents that are injected by a shunt active power filter (SAPF) to compensate for non-linear and reactive loads. Clarke's transformation is used to convert voltages and currents to the α-β-0 reference frame for IRP calculations. Hysteresis current control with a constant switching frequency is used to generate PWM signals to control the SAPF inverter. Simulations show the SAPF reducing current harmonics and reactive power, improving the power factor by making the source current sinusoidal and in phase with
El documento describe la anatomía y ecografía de la mama. La mama está formada principalmente por tejido glandular y adiposo, y está separada de los músculos por la aponeurosis profunda. La ecografía mamaria permite caracterizar nódulos como sólidos o quísticos y complementa a la mamografía. La técnica ecográfica evalúa la mama y axilas para detectar lesiones, y la estructura de la mama varía con la edad y etapas reproductivas de la mujer.
This document discusses good and bad design in presentations. It provides some rules for identifying good and bad design, such as whether the slide organization, information structure, and readability are functional and attention-grabbing. Examples of good design principles mentioned include simplicity, quality images, appropriate fonts, color matching, and effective word choice. The document then provides links to several example slides demonstrating good and bad design.
This document describes a memristor device using a heterojunction of silver nanoparticles and aluminum oxide for resistive switching applications. The device consists of an aluminum-aluminum oxide-silver nanoparticles-aluminum structure. Current-voltage measurements show a transition between two states, with a resistance ratio of 105 for the major transition and a ratio of 101 for the minor transition. Scanning electron microscopy images confirm the growth of a thin aluminum oxide film consisting of spherical nanoparticles approximately 40nm in size on an aluminum substrate. This memristor operates at low voltages and shows potential for non-volatile resistive random access memory.
This document presents a scalable method for image classification using sparse coding and dictionary learning. It proposes parallelizing the computation of image similarity for faster recognition. Specifically, it distributes the task of measuring similarity between images among multiple cores in a cluster. Experimental results on a face recognition dataset show nearly linear speedup when balancing the dataset size and number of nodes. Reconstruction errors are used as a similarity measure, with dictionaries learned using K-SVD for each image. The proposed parallel method distributes this similarity computation process to achieve faster image classification.
This document describes a VSC-HVDC transmission system connecting a strong AC system to a weak island AC system. It investigates the AC filter requirements and designs controllers for the VSC using optimal techniques. The controllers designed are a active power controller for the rectifier, reactive power controller for the rectifier, DC voltage controller for the inverter, and AC voltage controller for the inverter. Simulations are performed in MATLAB to analyze the system's performance for load variations in the island system.
This document provides a review of analytical modeling and designing of high-speed voltage differencing transconductance amplifier (VDTA)-based multiple input multiple output (MIMO) filters. It discusses MIMO filters and their realization as multiple input single output (MISO) or single input multiple output (SIMO) configurations. MISO configurations are preferred as they can reduce the number of active elements needed for circuit realization. The document then reviews several previous works on designing universal filters using active elements like VDTA. It provides details on the basic concept of VDTA, including its construction, working principle and advantages. Finally, the document proposes designing an electronically tunable universal MIMO filter using VDTA as the active element
The document discusses hiding confidential text data within an encrypted image using reversible data hiding techniques. It begins by introducing the concepts of reversible data hiding and meaningful image encryption. The proposed method first encrypts an original image using AES to create a pre-encrypted image. It then applies discrete wavelet transform to the pre-encrypted image to transform it into a visually meaningful encrypted image. Finally, reversible data hiding is used to hide confidential text data within the meaningful encrypted image while still allowing lossless retrieval of both the image and hidden data. The method aims to provide effective data protection with low computational cost.
This document describes a proposed integrated power electronics interface (IPEI) for battery electric vehicles (BEVs). The IPEI is designed to optimize power flow management for different operating modes like charging/discharging and traction/braking. It integrates a DC/DC converter, onboard battery charger, and DC/AC inverter to improve system efficiency and reliability while reducing component size and costs compared to other topologies. The document discusses the circuit design of the IPEI and its four operating modes. It also provides the dynamic modeling of the electric power train components like the battery and electric motor, as well as the control strategy design for the IPEI, which is analyzed using MATLAB/Simulink simulations.
The document describes the Xerox Color 800i/1000i presses. It highlights their ability to produce vibrant images with a wide color gamut across a range of media weights and sizes. It discusses the presses' digitally mastered image quality, productivity speeds of 80-100 pages per minute, and industry-leading availability. The document provides details on the presses' dry ink technology, color management, and automation features like the full width array sensor that help maintain accurate and consistent color over time.
This document provides an analytical review of algorithms that control congestion in vehicular networks (VANETs). It begins with an introduction to VANETs and the issues they face with congestion due to frequent broadcasting of safety and non-safety messages. It then discusses several proposed congestion control algorithms for VANETs, including a utility-based approach that encodes utility information in packets to prioritize them. The document analyzes the characteristics of different hop-by-hop congestion control approaches and highlights their advantages over end-to-end approaches for VANETs. Finally, it provides a comparison of various proposed algorithms for VANET congestion control.
AC M4 Ficha de trabalho 5 -bastidores e cablagem estruturadafilipereira
Este documento descreve bastidores e cablagem estruturada para redes locais, incluindo seus componentes principais como bastidores, cabos de rede e conectores, com imagens e preços de referência. A tarefa pede um relatório detalhando estas características e componentes com base em um manual e pesquisa online.
This document discusses a technique for detecting copy-paste or cut-paste digital image forgeries. The technique uses wavelet decomposition to decompose the input image into sub-bands, including low-low, low-high, high-low, and high-high. Edge detection is then performed to extract edges. The cut-paste or copy-paste region is identified by examining edge pixels in the wavelet domain, as this region is normally rectangular or square. Parameters like entropy, power energy, and standard deviation are compared between the input image and suspected forged images to detect forgeries. The technique was tested on images with copy-pasted areas and could accurately identify the forged regions.
This document discusses the implementation of instantaneous reactive power theory (IRP theory) for current harmonic reduction and reactive power compensation in three phase four wire power systems. IRP theory is used to calculate reference compensating currents that are injected by a shunt active power filter (SAPF) to compensate for non-linear and reactive loads. Clarke's transformation is used to convert voltages and currents to the α-β-0 reference frame for IRP calculations. Hysteresis current control with a constant switching frequency is used to generate PWM signals to control the SAPF inverter. Simulations show the SAPF reducing current harmonics and reactive power, improving the power factor by making the source current sinusoidal and in phase with