INTRODUCTION:
AMPLIFIER:
A circuit that increases the amplitude of a given input signal is called an amplifier. A small a.c. signal fed to the amplifier is obtained as a larger a.c. signal of the same frequency at the output.Amplifiers constitute an essential part of radio, television and other communication circuits. Bipolar junction transistors and Field effect transistors are commonly used as amplifying elements.
Amplifiers can be classified as follows:
1. Based on transistor conf ....etc

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ABSTRACT

Low-cost portable devices capable of capturing signature signals are being increasingly used. Additionally, the social and legal acceptance of the written signature for authentication purposes is opening a range of new applications. We describe a highly versatile and scalable prototype for Web-based secure access using signature verification. The proposed architecture can be easily extended to work with different kinds of sensors and large-scale databases. Several remarks are also given on security and privacy of network-based sign ....etc

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We are now entering the Third Age of reproduced sound. The monophonic era was the First Age, which lasted from the Edison's invention of the phonograph in 1877 until the 1950s. During those times, the goal was simply to reproduce the timbre of the original sound. No attempts were made to reproduce directional properties or spatial realism.

The stereo era was the Second Age. It was based on the inventions from the 1930s, reached the public in the mid-'50s, and has provided great listening pleasure for four decades. Stereo improved the reprodu ....etc

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ESCUELA POLITÉCNICA DEL EJÉRCITO



DESCRIPCIÓN
Utilizando como herramienta fundamental de desarrollo el software de simulación LOGIX PRO, y dentro del
mismo las plantas para simulación que este presenta, se pide el plantear en base a los elementos de entrada
y salida que contiene cada planta el realizar el programa el lenguaje de escalera que permita controlar su
funcionamiento, para esto se va a sortear entre los grupos de laboratorio las plantas existentes y cada gru ....etc

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The purpose of this seminar is to explore the advances and technologies of surround sound in the consumer market. Human hearing is binaural (based on two ears), yet we have the ability to locate sound spatially. That is, we can determine where a sound is coming from, and in most cases, from how far away. In addition, humans can distinguish multiple sound sources in relation to the surrounding environment. This is possible because our brains can determine the location of each sound in the three-dimensional environment we live in by processing th ....etc

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ESCUELA POLITÉCNICA DEL EJÉRCITO



DESCRIPCIÓN
Utilizando como herramienta fundamental de desarrollo el software de simulación LOGIX PRO, y dentro del
mismo las plantas para simulación que este presenta, se pide el plantear en base a los elementos de entrada
y salida que contiene cada planta el realizar el programa el lenguaje de escalera que permita controlar su
funcionamiento, para esto se va a sortear entre los grupos de laboratorio las plantas existentes y cada gru ....etc

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ABSTRACT

Low-cost portable devices capable of capturing signature signals are being increasingly used. Additionally, the social and legal acceptance of the written signature for authentication purposes is opening a range of new applications. We describe a highly versatile and scalable prototype for Web-based secure access using signature verification. The proposed architecture can be easily extended to work with different kinds of sensors and large-scale databases. Several remarks are also given on security and privacy of network-based sign ....etc

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ESCUELA POLITÉCNICA DEL EJÉRCITO



DESCRIPCIÓN
Utilizando como herramienta fundamental de desarrollo el software de simulación LOGIX PRO, y dentro del
mismo las plantas para simulación que este presenta, se pide el plantear en base a los elementos de entrada
y salida que contiene cada planta el realizar el programa el lenguaje de escalera que permita controlar su
funcionamiento, para esto se va a sortear entre los grupos de laboratorio las plantas existentes y cada gru ....etc

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Definition
There are many surround systems available in the market .They use different technologies for produce surround effect. Some Surround sound is based on using audio compression technology (for example Dolby ProLogic? or Digital AC-3?) to encode and deliver a multi-channel soundtrack, and audio decompression technology to decode the soundtrack for delivery on a surround sound 5-speaker setup. Additionally, virtual surround sound systems use 3D audio technology to create the illusion of five speakers emanating from a regular set of stere ....etc

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ABSTRACT
As more and more audiovisual information becomes available from many sources around the world, many people would like to use this information for various purposes. This challenging situation led to the need for a solution that quickly and efficiently searches for and/or filters various types of multimedia material thatâ„¢s interesting to the user.
For example, finding information by rich-spoken queries, hand-drawn images, and humming improves the user-friendliness of compute ....etc

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Abstract
On-line signature verication for Tablet PC devices is studied. The on-line signature verication algorithm pre- sented by the authors at the First International Signature Verication Competition (SVC 2004) is adapted to work in Tablet PC environments. An example prototype of securing access and securing document application using this Tablet PC system is also reported. Two different commercial Tablet PCs are evaluated, including information of interest for sig- nature verication systems such as sampling and pressure statistics. Authen ....etc

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Abstract
On-line signature verication for Tablet PC devices is studied. The on-line signature verication algorithm pre- sented by the authors at the First International Signature Verication Competition (SVC 2004) is adapted to work in Tablet PC environments. An example prototype of securing access and securing document application using this Tablet PC system is also reported. Two different commercial Tablet PCs are evaluated, including information of interest for sig- nature verication systems such as sampling and pressure statistics. Authen ....etc

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