Telecomunicaciones e internet

República Bolivariana de Venezuela
Ministerio Para la Defensa
Universidad Nacional Experimental Politécnica
De La Fuerza Armada Nacional
Sede-Naguanagua
Estado-Carabobo

telecomunicaciones
e internet

Sección: N-01-N
Bachilleres:
Ruiz María C.I:17.585.053
Mary González C.I:16.051.991
Yeliber Vivas C.I:18.470.810

Valencia, 02 de Febrero del 2010

Introducción

Es nuestro entorno estamosrelacionados en todo con la tecnología por lo que es importante conocer los elementos y herramientas fundamentales que conforman la tecnología siendo el internet la red prioritaria de comunicación conformado por las páginas web, los buscadores y navegadores los que ha través del tiempo se van mejorando para evolucionar e integrar nuevos programas que satisfagan de manera más rápida y amplia lacomunicación y el trabajo del ser humano.

Desarrollo

1. Definición de telecomunicación:

Conjunto de medios de comunicación a distancia o transmisión de palabras, sonidos, imágenes o datos en forma de impulsos o señales electrónicas o electromagnéticas.

2. Evolución de la telecomunicación:

Podríamos considerar el origen de las telecomunicaciones desde tiempos muy remotos cuando lainformación a transmitir se envía a través de mensajeros, los primeros sistemas de telecomunicaciones eran siempre por y para el servicio del estado. En el pasado los primeros sistemas de telecomunicaciones aparecen pronto en aquellos pueblos que por expansión de guerras se vieron obligados a contar con algún medio de envió rápido de noticias.

A partir de que Benjamín Franklin demostró, en 1752, que losrayos son chispas eléctricas gigantescas, descubrimiento de la electricidad; grandes inventos fueron revolucionando este concepto, pues las grandes distancias cada vez se fueron acercando. 1836 año en que Samuel F. B. Morse creo lo que hoy conocemos Telégrafo. Tomas Edison, en 1874, desarrolló la telegrafía cuádruple, la cual permitía transmitir dos mensajes simultáneamente en ambos sentidos.

Apesar de este gran avance, no era suficiente lo que lograba comunicar, es decir, esto era insuficiente pues se requería de algún medio para la comunicación de la voz. Ante esto, surge el teléfono, inventado por Alexander Graham Bell, que logra la primera transmisión de la voz en 1876.

Así los primeros sistemas telegráficos y telefónicos utilizaban cable para lograr la transmisión de mensajes. Conlos avances en el estudio de la electricidad, el físico alemán Heinrich Hertz descubre, en 1887 descubre las ondas electromagnéticas, estableciendo las bases para la telegrafía sin hilos.

Pero no fue hasta el siglo XX, cuando se inventan los tubos al vacío y el surgimiento de la electrónica, que se logran grandes avances, se inventa el radio, la primera emisión fue en 1906 en los Estados Unidos.En 1925 existían ya 600 emisoras de radio en todo el mundo.

En 1826, físico francés Nicéphore Niepce utilizando una plancha metálica recubierta de betún, expuesta durante ocho horas, consiguió la primera fotografía. Perfeccionando este procedimiento, el pintor e inventor francés Louis Jacques Mandé Daguerre descubrió un proceso químico de revelado que permitían tiempos de exposición muchosmenores, consiguiendo el tipo de fotografía conocido como daguerrotipo.

En el siglo XIX, se desarrolla este invento hasta llegar al cinetoscopio, presentado por Tomas Edison en 1889 y lo patento en 1891. Los hermanos Lumière, presentan y patentan el cinematógrafo en el año de 1895. Hasta el año de 1920 se le añade el sonido. Creando así, el cine, muy disfrutado en nuestros días.

Aunque la transmisiónde imágenes a distancia está ligada a varios avances e inventos, como: disco perforado explorador, inventado en 1884 por el pionero de la televisión, el alemán Paul Gottlieb Nipkow. Otros de los hechos en el desarrollo de la televisión son el iconoscopio y el cinescopio, para transmitir y recibir, respectivamente, imágenes a distancia, inventados ambos en 1923 por el ingeniero electrónico ruso…

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